Specific Novel Influenza A Viruses guidance

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Guidance for Industry and FDA Staff - Class II Special Controls
Guidance Document: Reagents for Detection of Specific Novel
Influenza A Viruses
Document issued on: March 22, 2006

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OMB control number: 0910-0584 (expires March 31, 2013). See additional PRA statement in Section 9 of this
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For questions regarding this document contact Claudia Gaffey at 301-796-6196 or by email at
claudia.gaffey@fda.hhs.gov.

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Public Comment
Written comments and suggestions may be submitted at any time for Agency consideration to Division of
Dockets Management, Food and Drug Administration, 5630 Fishers Lane, Room 1061, (HFA-305), Rockville,
MD, 20852. Alternatively, electronic comments may be submitted to Regulations.gov. Please identify your
comments with the docket number 2006D-0099. Comments may not be acted upon by the Agency until the
document is next revised or updated.

Additional Copies
Additional copies are available from the Internet. You may also send an e-mail request to dsmica@fda.hhs.gov
to receive an electronic copy of the guidance or send a fax request to 301-827-8149 to receive a hard copy.
Please use the document number (1596) to identify the guidance you are requesting.

Table of Contents
1. Introduction
2. Background
3. Scope
4. Risks to Health
5. Device Description
6. Performance
7. Labeling
8. Postmarket measures
9. Paperwork Reduction Act of 1995
References

Guidance for Industry and FDA Staff
Class II Special Controls Guidance Document:
Reagents for Detection of Specific Novel Influenza A Viruses
 1. Introduction
This document was developed as a special control to support the classification of reagents for detection of
specific novel influenza A viruses into class II (special controls). Reagents for detection of specific novel
influenza A viruses are devices intended for use in a nucleic acid amplification test to directly detect specific
virus RNA in human respiratory specimens or viral cultures. Detection of virus RNA aids in the diagnosis of
influenza caused by specific novel influenza A viruses in patients with clinical risk of infection with these viruses,
and also aids in the presumptive laboratory identification of specific novel influenza A viruses to provide
epidemiological information on influenza. These reagents include primers, probes, and specific influenza A virus
controls. They are used for detecting a specific influenza A virus (for example, a particular subtype or lineage),

as opposed to devices that are used in detecting influenza A virus generally, without detecting the presence of
specific influenza A viruses.
Novel influenza A viruses are new or re-emergent human strains of influenza A that cause cases or clusters of
human disease, as opposed to those human strains commonly circulating that cause seasonal influenza and to
which human populations have residual or limited immunity (either by vaccination or previous infection).
This guidance is issued in conjunction with a Federal Register notice announcing the classification of reagents
for detection of specific novel influenza A viruses. Any firm submitting a 510(k) premarket notification for
reagents for detection of specific novel influenza A viruses will need to address the issues covered in the
special control guidance. However, the firm need only show that its device meets the recommendations of the
guidance, or in some other way provides equivalent assurances of safety and effectiveness. In addition, the
device must satisfy the additional special control specified in the classification regulation (See Section 3 –
Scope).
The firm must show that its device addresses the issues of safety and effectiveness identified in this guidance,
either by meeting the recommendations of this guidance or by some other means that provides equivalent
assurances of safety and effectiveness.

The Least Burdensome Approach
The issues identified in this guidance document represent those that we believe should be addressed before
your device can be marketed. In developing the guidance, we carefully considered the relevant statutory criteria
for Agency decision-making. We also considered the burden that may be incurred in your attempt to comply
with the guidance and address the issues we have identified. We believe that we have considered the least
burdensome approach to resolving the issues presented in the guidance document. If, however, you believe
that there is a less burdensome way to address the issues, you should follow the procedures outlined in the “A
Suggested Approach to Resolving Least Burdensome Issues” document.

 2. Background
FDA believes that special controls, when combined with the general controls, will be sufficient to provide
reasonable assurance of the safety and effectiveness of reagents for detection of specific novel influenza A
viruses. A manufacturer who intends to market a device of this type should (1) conform to the general controls
of the Federal Food, Drug & Cosmetic Act (the Act), including the premarket notification requirements described
in 21 CFR 807 Subpart E, (2) address the specific risks to health associated with reagents for detection of
specific novel influenza A viruses identified in this guidance, (3) satisfy the other special control designated in
21 CFR 866.3332, the classification regulation for this type of device, and (4) obtain a substantial equivalence
determination from FDA prior to marketing the device.
This guidance document identifies the classification regulation and product code for reagents for detection of
specific novel influenza A viruses. (Refer to Section 3 – Scope). In addition, other sections of this guidance
document list the risks to health identified by FDA and describe measures that, if followed by manufacturers and
combined with the general controls and other special controls designated for this device type, will generally
address the risks associated with these assays and lead to a timely premarket notification [510(k)] review and
clearance. This document supplements other FDA documents regarding the specific content requirements of a
premarket notification submission. You should also refer to 21 CFR 807.87 and other FDA documents on this
topic, such as "Premarket Notification 510(k)".

 3. Scope
The scope of this document is limited to the following devices, described in 21 CFR 866.3332 (product code
NXD):
21 CFR 866.3332 - Reagents for detection of specific novel influenza A viruses.
(a) Identification. Reagents for detection of specific novel influenza A viruses are devices that are
intended for use in a nucleic acid amplification test to directly detect specific virus RNA in human
respiratory specimens or viral cultures. Detection of specific virus RNA aids in the diagnosis of
influenza caused by specific novel influenza A viruses in patients with clinical risk of infection
with these viruses, and also aids in the presumptive laboratory identification of specific novel
influenza A viruses to provide epidemiological information on influenza. These reagents include
primers, probes, and specific influenza A virus controls.
In addition to this guidance document, these devices are subject to a special control requiring that distribution
be limited to laboratories with (i) experienced personnel who have training in standardized molecular testing
procedures and expertise in viral diagnosis, and (ii) appropriate biosafety equipment and containment. (21 CFR
866.3332(b)(2)).
This special control guidance recommends specific information for mitigating risks identified in the following
section (Section 4 - Risks to Health). It supplements other applicable guidances. General recommendations for
fulfilling premarket notification (510(k)) requirements, including recommendations on descriptive information,
demonstrating performance, and labeling to establish substantial equivalence are specified in the document,
“Guidance for Industry and FDA Staff: Format for Traditional and Abbreviated 510(k)s”, issued August 12, 2005.
[Ref. 1]. In addition, FDA has developed draft guidance regarding the type of information generally
recommended for inclusion in a 510(k) for reagents used in nucleic acid amplification tests. We suggest that
manufacturers consult this guidance when final [Ref. 2].

 4. Risks to Health
Influenza illness caused by commonly circulating influenza A viruses can have high morbidity and mortality,
particularly in special populations like the elderly and the very young. Acquired immunity to seasonal influenza
viruses is limited because influenza viruses mutate in small but important ways from year to year (a process
known as antigenic drift). Novel influenza viruses present even greater likelihood of morbidity and mortality, with
the potential to cause widespread disease and/or disease of unusually high severity, because few people (or
none at all) have prior immunologic exposure to surface glycoproteins of these viruses. In addition, other
pathogenicity factors may increase virulence.
Failure of reagents for detection of specific novel influenza A viruses to perform as expected, or failure to

interpret results properly may lead to incorrect patient management decisions and inappropriate public health
responses. In the context of individual patient management, a falsely negative report could lead to delays in
providing (or even failure to provide) definitive diagnosis, appropriate treatment, and infection control and
prevention measures, while a falsely positive report could lead to unnecessary or inappropriate treatment, or
unnecessary control and prevention actions. In the context of public health, a falsely negative report could lead
to a delay in recognition of an outbreak or cluster of influenza due to a novel influenza A virus, while a falsely
positive report could lead to unnecessary public health actions (e.g., unnecessary or inappropriate treatment
and management of others in the community).
Several factors may negatively affect performance of these reagents, or lead to improper interpretation of
results. First, improper testing and inaccurate reporting may result when testing is not performed by trained and
experienced laboratory personnel. Because use of these reagents requires specialized techniques, testing by
laboratory personnel without experience and proper training in both preanalytical (specimen processing and
extraction) and analytical molecular procedures increases the risk of obtaining inaccurate results. Likewise, if
laboratory personnel lack expertise in viral diagnosis, there is an increased risk of providing inadequate or
inaccurate interpretation of testing results.
Second, the propensity of all influenza A viruses to mutate (viral RNA changes) may affect the performance of
reagents for detection of specific novel influenza A viruses. Primers and probes for detection of novel influenza
viruses are selected for their homology with highly conserved regions within viral RNA segments. With
continued mutations over time, annealing of primer and probe reagents with viral targets can diminish. This may
significantly reduce performance of the reagents.
Third, test performance can be affected because the epidemiology and pathology of disease caused by a
specific novel influenza A virus is not fully known. For example, clinicians and laboratories may not know the
optimum types of specimens to collect, and when during the course of infection these specimens are most likely
to contain levels of virus that can be readily detected.
In addition to the risks that the test will not perform as expected or that results will not be interpreted properly,
testing with these reagents is associated with a potential for transmission of novel influenza A viruses. Controls
that are not adequately inactivated may themselves be a source of infection. Testing with these devices by
inexperienced or untrained laboratory personnel, as well as use of these reagents in laboratories that do not
have appropriate biosafety equipment and containment procedures, increases risk of laboratory-acquired
infection caused by novel influenza A virus and potential for spreading infection to others outside the laboratory.
Additionally there is the risk that a novel influenza virus may reassort with other influenza viruses if not properly
contained. Influenza viruses, including novel viruses such as the H5N1 avian influenza virus, have the capability
to reassort with influenza viruses circulating in other animal species. Reassortment of a novel influenza A virus
with a human influenza virus, may lead to significant changes in the virus, such as changes in host range,
virulence, and antigenicity, which can lead to the virus acquiring the ability for sustained person-to-person
transmission. This change is believed necessary to precipitate pandemic influenza. Conditions that favor
reassortment are more likely to occur if testing is done by inexperienced or untrained personnel, or without
appropriate biosafety equipment and containment procedures.
In the table below, FDA has identified the risks to health generally associated with the use of reagents for
detection of specific novel influenza A viruses. Measures recommended to mitigate these identified risks are
given in this guidance document, as shown in the table below. (In addition, the classification regulation for this
type of device designates an additional special control intended to mitigate these risks, indicating that
distribution of these devices is limited to laboratories with (i) experienced personnel who have training in
standardized molecular testing procedures and expertise in viral diagnosis, and (ii) appropriate biosafety
equipment and containment. See 21 CFR 866.3332(b)(2).)
We recommend that you conduct a risk analysis, prior to submitting your premarket notification, to identify any
other risks specific to your device. The premarket notification should describe the risk analysis method. If you
elect to use an alternative approach to address a particular risk identified in this document, or have identified
risks additional to those in this document, you should provide sufficient detail to support the approach you have
used to address that risk.
Identified risk

Recommended mitigation
measures

Failure of testing to perform properly
Failure of the reagents to perform as expected, including inability to detect
mutated viral RNA
Inability to optimize testing when epidemiology or pathology of viral/host
factors is not fully understood

Sections 5-8

Failure to properly interpret test results

Sections 5-8

Laboratory-acquired infection and reassortment

Sections 5 and 7

 5. Device Description
Intended Use 
Your 510(k) must include labeling that describes the intended use of your product. (See 21 CFR 807.87(e)).
You should ensure that all elements of the intended use are clearly stated, particularly regarding the specific
viruses the device is intended to detect (for example, influenza A/H5 (Asian lineage)). The intended use
includes the viral RNA region detected (analyte), the patient population to be tested, specimen types for which
testing will be indicated, and any specific conditions of use.
In your 510(k), you should clearly describe the following information related to the intended use of your product:
The identity, phylogenetic relationship, or other recognized characterization of a specific novel influenza virus
that your device is designed to detect.
How the device test results will be used in a diagnostic algorithm and other measures that would be needed

for a definitive laboratory identification of a specific novel influenza A virus.
Clinical and epidemiological parameters that are relevant to a patient case diagnosis. The World Health
Organization (WHO) and other public health entities provide criteria that may be used as a guide for defining
patient cases.
Note: Recognized laboratory methods for definitive identification of certain novel influenza viruses are available
(e.g., WHO Manual on Animal Influenza Diagnosis and Surveillance) [Ref. 3.]; sequencing of DNAs generated
by subtype-specific primers may also be used to definitively identify a specific novel influenza virus [Ref. 4].

Reagents and other device components
When describing reagents and other device components in your 510(k), we recommend you follow general
guidance provided in other FDA guidance documents. FDA has developed draft guidance regarding Nucleic
Acid Amplification Testing, which will be particularly relevant when final [Ref. 2]. Additionally, for reagents for
detection of specific novel influenza A viruses, you should describe design requirements for your device that
address or mitigate risks associated with primers, probes, and controls used in a nucleic-acid based test
procedure to detect viral RNA segments from a specific novel influenza A virus. Examples include:
Designing your reagent for use in a closed tube test system, to minimize false positives due to contamination
or carryover.
Providing multiple probes that enable detection of virus variants appearing due to mutations within the target
RNA segment(s), or variants within a designated novel influenza virus strain (or lineage).
Developing a positive virus control that minimizes the risk that the control itself will be a source of infection or
of reassortment with other influenza A viruses handled or maintained in the type of clinical laboratory where
testing is intended to be done.
Developing methods for extraction and purification that yield suitable quality and quantity of viral RNA from
different specimen types for use in the test system with your reagents.
Optimizing your reagents and test procedure for recommended instruments.
We expect that appropriate literature references will not likely be available to detail reliable RNA targets within
any viral RNA region (e.g., H 0 within the hemagglutinin RNA) characteristic for a specific novel influenza A
virus. In your 510(k), you should provide performance information that supports the conclusion that your design
requirements have been met. You should also provide information to verify the design of your reagents (e.g.,
rationale for selection of specific conserved target sequences and the methods used to design primers and
probes). (See Section 6 – Performance).
You should assure acceptable reproducibility and efficiency of the recommended extraction procedure(s) from
respiratory specimen types you recommend for testing (e.g., swabs, aspirates, and viral culture media).

Testing Procedures using your device
In your 510(k), you should describe, in detail, the principles of operation applicable to your device in detecting
and differentiating a specific novel influenza A virus. For reagents for detection of specific novel influenza A
viruses, you should specifically describe testing conditions, procedures and controls designed to provide
safeguards for conditions that can cause false positive and false negative results, or present a biosafety hazard.
These include, but are not limited to:
Overall design of the testing procedure, including control elements incorporated into the recommended
testing procedures. These controls should approximate the lower range of clinically relevant viral RNA levels
and should be extracted as a clinical sample.
Recommendations for additional controls that monitor for contamination and extraction efficiency (e.g., a
blank extracted with each specimen test, and concurrent amplification of an endogenous human gene in the
sample, as a control for nucleic acid extraction and inhibition).
Features and additional controls that reduce failure to recognize procedural errors or factors (e.g.,
degradation of master mix) that adversely affect amplification and detection conditions.
Biological Safety Level (BSL) under which testing procedures should be performed.
We recommend that you include a description of all additional procedures, methods, and practices incorporated
into your directions for use (See Section 7 - Labeling) that mitigate risks associated with testing for a specific
novel influenza A virus.

Interpreting Test Results/Reporting
In your 510(k), you should describe how presumptive positive, equivocal, and negative results are determined
and how they should be interpreted. There should be clear explanations for how interpretative algorithms have
been determined. In addition, please see Section 8 (Postmarket Measures) for monitoring results over time to
identify changes in performance due to biological changes with the virus, or changes in performance when
prevalence changes from the existing prevalence at the time your product is evaluated.

 6. Performance
In your 510(k), you should provide descriptive information on the studies done to support performance of your
reagents for detection of specific novel influenza A viruses. FDA has developed draft guidance elsewhere
making general recommendations for this information [Ref. 2].
Your 510(k) should include performance information demonstrating:
Detection of a specific novel influenza A virus (e.g., influenza A/H5 (Asian lineage)) directly in respiratory
specimens from patients who were identified clinically and epidemiologically, and were laboratory confirmed
patient cases (using WHO recommended criteria) [Ref. 3].
Low likelihood of presumed false positive results when testing specimens from patients who were known to
have other influenza A or influenza B virus infections, or who have no influenza viruses detected by WHOrecommended methods (primarily virus culture) [Ref. 4].
Detection of known variant novel influenza A viruses (e.g., clades, lineages).
Lack of cross-reactivity with other broadly representative influenza A viruses that are known to cause human
infections (e.g., influenza A/H3N2), with other respiratory viruses (e.g., respiratory syncytial virus, human
metapneumovirus, etc.) and with relevant bacterial species (e.g., Streptococcus pneumoniae,
Staphylococcus aureus).
Rare unexpected positivity when testing is done on a large group of specimens from individuals with

respiratory symptoms, and from viral cultures.
Reproducible and efficient extraction procedure(s) for respiratory specimen types that you recommend for
testing (e.g., swabs, aspirates, and viral culture media).
Reproducible results without unexpected false positive or false negative test results in multiple clinical
laboratories. Samples should include those representing the lower end of the viral level range that is clinically
relevant (e.g., 101-106 TCID50/mL viral levels have been documented in respiratory specimens from patients
with influenza A/H5 infections; thus samples should represent that lower range for A/H5 viruses).

Clinical studies
FDA recommends that you assess the ability of your device to detect the specific novel influenza A virus in
specimens from patients who are case-confirmed, in accordance with WHO criteria for laboratory-confirmed
cases. Fresh samples are preferred and testing multiple specimen types is helpful for positive case
determinations. Any additional testing that is done to qualify presumptive positives and equivocal test results
should include WHO-recommended methods for characterizing and identifying a novel influenza A virus,
including sequencing as needed.
When evaluating your device with specimens from patients not suspected to have a novel influenza virus
infection, fresh samples are preferred. However, archived samples may be useful to expand representation of
specimens (e.g., geographically diverse, different specimen types recommended). Archived samples may be
useful to provide the variety of specimen types from patients who have other respiratory infections, and from
whom fresh specimens may not be readily available (e.g., S-coronavirus positive samples).

 7. Labeling
IVD devices for direct detection of specific novel influenza A viruses in human specimens, like other devices,
are subject to statutory requirements for labeling (Federal Food, Drug and Cosmetic Act (the Act), Sections
502(a), 201(n); 21 USC §§ 352(a), 321(n)). Reagents for detection of specific novel influenza A viruses must
provide adequate directions for use and adequate warnings and precautions. (Section 502(f); 21 USC § 352(f)).
Specific labeling requirements for all IVD devices are set forth in 21 CFR 809.10.
Although final labeling is not required for 510(k) clearance, final labeling for in vitro diagnostic devices must
comply with the requirements of 21 CFR 809.10 before an in vitro diagnostic device is introduced into interstate
commerce.
To ensure compliance with section 502 of the Act and 21 CFR 809.10, FDA recommends that labeling for these
devices (reagents for detection of specific novel influenza A viruses) address the items identified below. These
labeling recommendations also help to mitigate the risks identified previously in this guidance to ensure safe
and effective use of these devices, particularly when a novel influenza A virus may be emerging.
Your labeling should clearly describe the identity, phylogenetic relationship, or other recognized characterization
of a specific novel influenza virus that your device is designed to detect, and the associated clinical aspects of
human infection.
Your labeling should also include a statement such as the following: “If infection with a novel influenza A virus is
suspected based on current clinical and epidemiological screening criteria recommended by public health
authorities, specimens should be collected with appropriate infection control precautions for novel virulent
influenza viruses. Viral culture should not be attempted in these cases unless a BSL 3+ facility is available to
receive and culture specimens.”

Intended Use 
In addition to specific elements that describe the analyte detected, your intended use 1 should specify
indications for testing respiratory specimens from patients with symptoms of respiratory illness and a risk of
exposure, and that these reagents should be used in conjunction with other laboratory testing and clinical
observations. FDA also recommends that your statement of intended use be clarified by a warning statement
such as: “Negative results do not preclude influenza virus infection and should not be used as the sole basis for
treatment or other patient management decisions.”
You should also prominently provide the following statement immediately below your intended use: “For use by
experienced personnel who have training in standardized molecular testing procedures and expertise in viral
diagnosis, in laboratories with appropriate biosafety equipment and containment procedures.”

Directions for use
You should provide clear and concise instructions that delineate the clinical and epidemiological relevance of
the particular novel influenza strain that is detected, technological features of the specific device, procedures for
using reagents, and types of controls that will minimize risks of inaccurate results. Instructions should
encourage use of additional control measures and testing of control material to ensure use in a safe and
effective manner.
If your reagents will not include reagents for extraction and preparation, you should provide specifications for
the extraction and preparation reagents that users will need to perform testing. You should also provide
specifications for assessing the quality of extracted/purified samples.

Quality Control 
We recommend that you provide a description of quality control recommendations, types of procedures and
material that can be used as additional quality control measures, and the expected results for acceptability of
control testing.

Precautions for interpretation 
We recommend that you incorporate directions for reporting results into the Results section, 2 including a
reminder to report results to state or local public health departments. Additionally you should provide the
following types of statements in the Limitations 3 section:
Negative results (e.g., no novel viral RNA detected) do not exclude influenza infection with other influenza A
or B viruses.
Additional testing for influenza A or B, or other respiratory infections may be required.
Results that are positive for a novel influenza A virus do not definitively identify a specific influenza A virus
subtype.

Optimum specimen types and timing for peak viral levels during infections caused by a novel influenza A
virus have not been determined. Collection of multiple specimens from the same patient may be necessary to
detect the virus.
False negative results may occur if a specimen is improperly collected, transported or handled. False
negative results may occur if inadequate numbers of organisms are present in the specimen.
Positive and negative predictive values are highly dependent on prevalence. False positive test results are
likely when prevalence of disease due to a novel influenza A virus is low or non-existent in a community.
If the virus mutates in the target region, a specific novel influenza A virus may not be detected or may be
detected less predictably.
Inhibitors or other types of interference may produce a false negative result.

 Performance Characteristics4
We recommend that in your labeling, you describe the population(s) (i.e., geographical location, specimen types,
and age groups) whose specimens were tested to support performance characteristics. You should separately
represent testing done on specimens from patient cases that are laboratory-confirmed with influenza due to the
novel influenza A virus that your device is intended to detect.
You should include a description of the design and evaluation of results for all studies that would aid users in
interpreting test results.

 8. Postmarket measures
We recommend that you obtain and analyze data postmarket to ensure the continued reliability of your device in
detecting the specific novel influenza A virus that it is intended to detect, particularly given the propensity for
influenza viruses to mutate and the potential for changes in disease prevalence over time. We recommend the
following measures:
As updated influenza viral sequences become available (from WHO, NIH and other public health entities),
you should compare them with your primer/probe sequences and incorporate the result of these analyses
into your Quality Management System, as required by 21 CFR 820.100(a)(1), Corrective and Preventive
Action. Further, these analyses should be evaluated against the device design validation and risk analysis
required by 21 CFR 820.30(g), Design Validation, to determine if any design changes may be necessary.
If the prevalence of influenza caused by the specific novel influenza A virus that your device is intended to
detect changes, compared to the prevalence existing when the clinical evaluation(s) described in your 510(k)
were conducted, you should collect data on the clinical performance of your device under the new prevalence
conditions. The prevalence of infection with the specific novel influenza virus that your device is intended to
detect may change significantly with time, possibly affecting your device performance. The labeling of your
device may need to be revised to reflect the new clinical performance data.
To demonstrate how you will address this aspect of the special control, we recommend that you provide a plan
that describes how you intend to address the postmarket elements described above with your 510(k)
submission. FDA will evaluate whether this plan will help to mitigate the risks presented by the device and
therefore help to provide continued reasonable assurance of the safety and effectiveness of the device.

 9. Paperwork Reduction Act of 1995
This guidance contains information collection provisions that are subject to review by the Office of Management
and Budget (OMB) under the Paperwork Reduction Act of 1995 (44 U.S.C. 3501-3520).
The time required to complete this information collection is estimated to average 10 hours per response,
including the time to review instructions, search existing data resources, gather the data needed, and complete
and review the information collection. Send comments regarding this burden estimate or suggestions for
reducing this burden to:
Department of Health and Human Services
Food and Drug Administration
Office of Chief Information Officer
Paperwork Reduction Act (PRA) Staff
1350 Piccard Drive, Room 400
Rockville, MD 20850

This guidance also refers to previously approved collections of information found in FDA regulations. These
collections of information are subject to review by the Office of Management and Budget (OMB) under the
Paperwork Reduction Act of 1995 (44 U.S.C. 3501-3520). The collections of information in 21 CFR § 809 have
been approved under OMB Control No. 0910-0485; the collections of information in 21 CFR § 807 have been
approved under OMB Control No. 0910-0120; the collections of information in 21 CFR § 820 have been
approved under OMB Control No. 0910-0073.
An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information
unless it displays a currently valid OMB control number. The OMB control number for this information
collection is 0910-0584 (expires March 13, 2013).

 References
[1] Guidance for Industry and FDA Staff: Format for Traditional and Abbreviated 510(k)s, issued August 12,
2005. Available at
 [2] Nucleic Acid Based In Vitro Diagnostic Devices for Detection of Microbial Pathogens - Draft Guidance for
Industry and FDA Staff, DRAFT GUIDANCE, issued on: December 8, 2005
[3] WHO (2002). WHO manual on animal influenza diagnosis and surveillance , 2002, Geneva, World Health
Organization (document WHO/CDS/CSR/NCS/2002.5
[4] WHO (2005). Recommended laboratory tests to identify avian influenza A virus in specimens from humans,
2005, Geneva, World Health Organization.
 1. 21 CFR 809.10(a)(2); 21 CFR 809.10(b)(2).
 2. 21 CFR 809.10(b)(9).

 3. 21 CFR 809.10(b)(10).
 4. 21 CFR 809.10(b)(12).
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