Investigations are in progress for six patients of two HCWs.
Genetic sequencing was performed on HIV strains from 29 of the 92 seropositive patients from the practices of three HCWs. Sequencing was not performed on the isolates for the remaining two of the five patients with no identified risk because one patient died before a blood sample could be collected, and the other refused to provide a sample. Thus, follow-up to date has not demonstrated transmission from an HCW as a source of HIV infection for any of the patients tested. Patient I, a teenaged female, was HIV seropositive when tested as an applicant for military service in late 1992. She denied previous injecting-drug use, receipt of blood or blood products, a history of sexually transmitted diseases, or sex with persons infected with HIV or at increased risk for HIV infection.