A new study by the Centers for Disease Control and Prevention (CDC) shows that the new rate HIV infection between 06 and 09 remained stable in the country for all but one group: young, black men who have sex with men (MSM). The CDC study cited the most sensitive technique used yet to determine that each year about 50 000 people are infected, which is consistent with previous estimates. But among bisexual men between 13 and 29 black and gay, the incidence increased 48% to 6,500 cases in 09. "We are very concerned about this trend," said CDC Director Thomas Frieden during ' a press teleconference this afternoon.
the new CDC data, published today in PLoS oNE , show that the MSM of all ethnic groups represented 61% of new infections United States in 09. Next came heterosexual transmission (27%), the main mode of spread in most of the world, injecting drug use (9%). the use of powerful prophylactic antiretroviral drugs has reduced the number babies will be infected by their mothers that this channel was included in the "other" category, which represents less than 1% of the total impact.
Joseph Prejean HIV incidence and CDC case surveillance emphasized that black men (which she also characterized as African Americans) do not indicate more risk behaviors than other MSM. "We do not have all the answers on what may be driving this trend," said Prejean. But he and his colleagues offered a long list of possibilities, including more HIV in the network of people they sex with higher rates of other sexually transmitted infections as the ease of transmission of the AIDS virus and stigmatization deeply rooted in their communities on homosexuality and the disease itself.
in overall, men and black women had 7.7 times the rate of new infections documented in white in 09. Latinos were 2.9 times higher incidence than white this year. "HIV remains one of disparities for the most egregious health for African Americans and Latinos, "said Prejean.
Since 1994, 25 states have provided CDC with information on newly diagnosed HIV infections. But these data not distinguish between people who have been recently infected and those who had fed the virus for years. However, CDC has used these prevalence data, combined with cases of AIDS (which had been reported since 1982), to estimate the impact. With the advent of new techniques that use antibodies to HIV levels to assess how long a person has been infected, CDC in 04 began giving money to selected locations for the impact monitoring.
Although the current analysis uses actual incidence data, it extrapolates information from 16 states and two cities to produce an estimated number for the entire nation. CDC researchers explain in their PLoS ONE paper how they adjusted their model to get the best estimates.
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