Babies who escape HIV face other death risks: study
Sunday 13 February 2011
Babies lucky enough not to get HIV from their infected mothers still face up to a four times greater risk of dying in the first year because of a greater susceptibility to infectious disease, said a study Tuesday.
Researchers examined around 100 mothers and their babies in South Africa, and compared antibody levels among children who were born infected with HIV to children who escaped HIV, a group described as HIV-exposed infants.
Those who did not get HIV showed lower levels of antibodies to whooping cough, tetanus and pneumococcus infections, which can be preventable by vaccination, though vaccines are not always available in poor areas of the world.
"These infants and children represent a vulnerable group with increased rates of lower respiratory tract infection and meningitis and up to four-fold higher mortality in the first year of life," said the study in the Journal of the American Medical Association.
"Altered immune responses might contribute to the high morbidity and mortality observed in HIV-exposed uninfected infants."
The number of HIV-exposed infants is on the rise, particularly in the developing world, because of strategies that reduce the likelihood that mothers will pass the disease onto their children.
Births of HIV-positive babies have dropped dramatically in the past decade due to medications that mothers can take during pregnancy to prevent transmission.
But infectious disease remains a major killer of children under five, killing close to six million children globally each year.
Researchers said more study was needed to be sure of the link between low antibodies and higher death rates, and to look at how to better deliver vaccines in impoverished nations.
"We were unable to correlate antibody levels with long-term vaccine responses or clinical outcomes in the women or infants," it said.
"However, our data contribute to a potential explanation for the higher morbidity and mortality observed among African HIV-exposed infants."
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