Vertical transmission of HIV from mother to child in sub-Saharan Africa: modes of transmission and methods for prevention

Protective efficacy of co-trimoxazole prophylaxis against malaria in HIV exposed children in rural Uganda: a randomised clinical trial

OBJECTIVE

To evaluate the protective efficacy of co-trimoxazole prophylaxis against malaria in HIV exposed children (uninfected children born to HIV infected mothers) in Africa.

DESIGN

Non-blinded randomised control trial

SETTING

Tororo district, rural Uganda, an area of high malaria transmission intensity

PARTICIPANTS

203 breastfeeding HIV exposed infants enrolled between 6 weeks and 9 months of age

INTERVENTION

Co-trimoxazole prophylaxis from enrollment until cessation of breast feeding and confirmation of negative HIV status. All children who remained HIV uninfected (n = 185) were then randomised to stop co-trimoxazole prophylaxis immediately or continue co-trimoxazole until 2 years old.

MAIN OUTCOME MEASURE

Incidence of malaria, calculated as the number of antimalarial treatments per person year.

RESULTS

The incidence of malaria and prevalence of genotypic mutations associated with antifolate resistance were high throughout the study. Among the 98 infants randomised to continue co-trimoxazole, 299 malaria cases occurred in 92.28 person years (incidence 3.24 cases/person year). Among the 87 infants randomised to stop co-trimoxazole, 400 malaria cases occurred in 71.81 person years (5.57 cases/person year). Co-trimoxazole prophylaxis yielded a 39% reduction in malaria incidence, after adjustment for age at randomisation (incidence rate ratio 0.61 (95% CI 0.46 to 0.81), P = 0.001). There were no significant differences in the incidence of complicated malaria, diarrhoea, pneumonia, hospitalisations, or deaths between the two treatment arms.

CONCLUSIONS

Co-trimoxazole prophylaxis was moderately protective against malaria in HIV exposed infants when continued beyond the period of HIV exposure despite the high prevalence of Plasmodium genotypes associated with antifolate resistance. Trial registration Clinical Trials NCT00527800.

Critical illness and pregnancy: review of a global problem

Obstetric patients are a small but important group of patients in the intensive care unit (ICU). Their problems are unique and need specialized attention. Decision making may be confounded by physiologic changes in pregnancy. In developed countries with good antenatal care, comparatively fewer obstetric patients are admitted to ICUs, but the maternal mortality rate remains high in the developing countries. Medical disorders and organ dysfunction caused by critical illness of pregnancy differ from region to region. With improvement in antenatal care, the number of ICU admissions for obstetric disorders would decline in developing countries; however, this number may increase gradually in developed countries because of increasing maternal age and pregnancies in women with complicated chronic medical disorders.

HIV infection in critically ill obstetrical patients

OBJECTIVES

The effect of HIV-infection on the clinical course of critically ill obstetrical patients by means of a case-control study was evaluated.

METHODS

Over one calendar year 440 patients were admitted to a high risk obstetrical unit. All patients were tested for HIV-infection. HIV-positive patients were included in the study group and two HIV-negative patients for every HIV-positive patient were included in the control group.

RESULTS

No differences were found between the two groups regarding demographic data, diagnosis, antibiotic use, mode of delivery, duration of hospital stay and mortality. More complications occurred in the HIV-negative group. Eclampsia recorded for the HIV-negative group was 17.1% and 4.7% for the HIV-positive group (P=0.04; 95% CI: -17.1%; -0.9%) and lung edema was 18.2% and 6.2%, respectively (P=0.01; 95% CI: -19.3%; -3.5%). The median CD4/CD8 ratio was significantly lower in the HIV-positive group (0.43) than the HIV-negative group (1.37) (P<0.01; 95% CI: -1.04; -0.79).

CONCLUSIONS

HIV-infection did not significantly alter the clinical course of critically ill patients in an obstetrical high care unit.