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Rebound Seen Predelivery After HIV Suppression in Pregnancy

6 percent of women with HIV suppression during pregnancy had viral load rebound before delivery


FRIDAY, Aug. 11, 2017 (HealthDay News) -- Women achieving HIV viral suppression in pregnancy can experience viral load rebound predelivery, according to a study published in the September issue of Obstetrics & Gynecology.

Isabelle Boucoiran, M.D., from the University of British Columbia in Vancouver, Canada, and colleagues used a Canadian provincial perinatal HIV database (1997 to 2015) to identify patients who had a live birth, received combination antiretroviral therapy for at least four weeks, had viral load measured within one month of delivery, and had at least one previous undetectable viral load during pregnancy. Viral load rebound was defined as viral load >50 copies/mL (or >400 copies/mL for 1997 to 1998).

The researchers found that 318 of the 470 women in the database met inclusion criteria. Nineteen women (6 percent) had viral load rebound with a mean log10 viral load near delivery of 2.71 copies/mL (=513 copies/mL), while six women (32 percent) had a viral load above 1,000 copies/mL. In half of the women, rebound was detected within one day before delivery. Viral load rebound was significantly associated with aboriginal ethnicity, cocaine use, and hepatitis C virus polymerase chain reaction positivity. There were no HIV vertical transmissions.

"Even women attending for HIV care and achieving viral suppression in pregnancy can experience viral load rebound predelivery," the authors write.

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