Nigeria - Integrated Biological and Behavioural Surveillance Survey 2007, Second round

Start	End	Cycle
2007	2007	Not stated in the report

Start	End	Cycle
2007		1 yr

Face-to-face [f2f]
The survey was administered for all target groups through one-on-one face-to-face interviews in private settings that guaranteed the confidentiality of information provided by the respondent. The survey team for each group in each state consisted of three or four interviewers, one supervisor and one counselor-tester. The respondents were assured that all information and discussions remained confidential, that no personal identifiers would be recorded, and that their participation was voluntary. They were informed that they may refuse to answer any questions and that they may opt out of the study at any time. They were also told that their decision to participate or to not to participate did not affect any benefit that they would normally receive.

All study related biological specimens and questionnaires were labeled with a study number. The respondent's identity was not asked nor entered onto the survey forms. Signed/witnessed consent was obtained for each respondent prior to conducting the interview. Witnessed consent was obtained by a counselor or supervisor who acknowledged that all necessary information was provided and understood. Interviewers ensured that respondents were not interviewed twice by asking respondents if they were interviewed earlier on in the survey, and using a single team member for screening RDS participants. Test results were kept on file at nearby HCT centres for at least 3 months to enable mobile populations to return for their results.

All survey specimens were tested for HIV and syphilis using standard diagnostic algorithms currently in place in Nigeria. Ten ml of blood was collected into a vacutainer tube by appropriately trained counselors under supervision of the TC. Vacutainer tubes were labeled with the pa a refrigerator at 4°C. At the end of each day (or the following morning, in the case of night-time data collection) specimens were transported to a designated testing site. Plasma was extracted from blood specimens by centrifugation and transferred by pipette to 3 ml cryotubes. The HIV diagnostic algorithm used was follows: Determine, Stat-pak in parallel for screening, and Genie II for confirmation with Capillus as a tie breaker. The syphilis status was determined using the following tests: Rapid Plasma Reagin test (RPR) for screening; and Treponema Pallidum Haemagglutination Assay (TPHA) for confirmation. Once samples were processed and all testing completed, specimens were stored frozen.

Name	Abbreviation	Affiliation
FHI 360 Nigeria Country Office	FHI 360	FHI 360 Headquarters, USA

Every field team had one supervisor. The supervisors reviewed each completed questionnaire immediately after the interview session ended and identified mistakes which were corrected before the respondent left the site.
The completed questionnaires were also further reviewed by the State AIDS Program Coordinator and the TC members supervising the teams in each state. At least two TC members were assigned to each state. They visited each site several times to provide guidance and oversight to supervisors where necessary.

They also supervised the sampling techniques to ensure that the teams adhered to the sampling methods described for the different groups.