Molecular analysis in support of an investigation of a cluster of HIV-1-infected women.
An investigation of a possible single-source sexual transmission case was conducted in upstate New York in 1997-1998 (MMWR 1999;48:413-416). Of 42 primary female contacts with the putative male index case, 13 tested positive for HIV infection. Blood was available for DNA sequencing (C2V3C3 region of the env gene and the p17-coding region of gag) from 10 of the 13 women, 1 HIV-infected secondary contact, and 2 HIV-infected persons from the community, but not from the index cam. Phylogenetic and distance analyses were performed with the inclusion of reference HIV subtype strains for both the env and gag gene regions, as was the two regions combined. A high degree of relatedness was found among DNA sequences of the 10 primary contacts that excluded reference strains, the secondary contact, and the community HIV control subjects. In conclusion, phylogenetic analysis of HIV strains in an epidemiologic investigation is highly useful in support of cluster identification, even without sampling from the putative index patient.
Robbins
Kenneth E
KE
Center for Disease Control and Prevention, Atlanta, Georgia 30333, USA. KRobbins@cdc.gov
Weidle
Paul J
PJ
Brown
Teresa M
TM
Saekhou
Ae M
AM
Coles
Bruce
B
Holmberg
Scott D
SD
Folks
Thomas M
TM
Kalish
Marcia L
ML
D000595:Amino Acid Sequence; D016000:Cluster Analysis; D016358:Contact Tracing; D005260:Female; D015683:Gene Products, gag / Q000235:genetics; D015488:HIV Antigens / Q000235:genetics; D015699:HIV Envelope Protein gp120 / Q000235:genetics; D015658:HIV Infections / Q000453:epidemiology / Q000635:transmission* / Q000821:virology; D015497:HIV-1 / Q000145:classification* / Q000235:genetics; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009518:New York / Q000453:epidemiology; D010446:Peptide Fragments / Q000235:genetics; D010802:Phylogeny; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D015229:Sexually Transmitted Diseases, Viral / Q000453:epidemiology / Q000635:transmission* / Q000821:virology; D014764:Viral Proteins; D054301:gag Gene Products, Human Immunodeficiency Virus
D015683:Gene Products, gag; D015488:HIV Antigens; D015699:HIV Envelope Protein gp120; C059762:HIV envelope protein gp120 (305-321); D010446:Peptide Fragments; D014764:Viral Proteins; D054301:gag Gene Products, Human Immunodeficiency Virus; C054858:p17 protein, Human Immunodeficiency Virus Type 1