Data Collected


Our participants have semi-annual visits at which mSTUDY collects specimens for clinical testing and biorepository storage, issues a clinical exam, and conducts a behavioral assessment. Data from the following measures can be made available for approved sub studies. For more information about the information and specimens we collect, please contact

Component Procedures
Medical history
Physical exam, including rectal exam and ROS if indicated
Behavioral Assessment Survey to assess sexual behavior, social networks, and drug use
Collect urine samples for the following tests:

Toxicology screen for methamphetamine, opiates, cocaine, nitrites and ecstasy
Chlamydia trachomatis (CT)
Neisseria gonorrhea (GC)

Blood (~125 mL) Collect blood specimens for the following tests:HIV Antibody (can be done by oral swab Rapid HIV test)
Comprehensive Metabolic Panel
CBC with Diff
Hep B Surface Antigen
Hep B Surface Antibody
Hep B Core Antibod
HCV Antibody
HCV RNA PCR, if needed
Syphilis RPR (and confirmatory test if needed)
T-Cell PanelPrepare the following blood specimens (~56 mL) for storage in bio-repository:Plasma and PBMCs from ~60 mL of blood (6 x 10 mL LAV tops)
Serum from ~20 mL of blood (2 x 10 mL red tops)
Whole blood (~4 mL EDTA)
Saliva 1 mL of saliva fluid for storage in bio-repository
Oral Pharyngeal Swab Collect 1 oral pharyngeal swab to test for the following:Chlamydia trachomatis (CT)
Neisseria gonorrhea (GC)
Rectal Swabs Collect 1 rectal swab to test for the following:Rectal Chlamydia trachomatis (CT)
Rectal Neisseria gonorrhea (GC)Prepare 1 rectal swab specimens for storage in bio-repository.
Rectal Sponges Collect rectal fluid and prepare 2 rectal sponge specimens for storage in bio-repository.
Hair and/or Nail Approximately 100 strands of hair or 100 mg of nail clippings will be collected. A clipping of 2-3 mm long (about the width of a quarter) from all ten fingernails will give about 100 mg of sample.
Semen Optional