Zika may stay in semen for a shorter period of time than expected: research

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Dennis Thompson
Health Day Reporter

Wednesday, April 11, 2018 (HealthDay News)-Guidelines for protection from sexually transmitted infections are in place Zika virus It needs to be reassessed based on new research from the US Centers for Disease Control and Prevention. Prevention..

CDC is currently Zika-Use either active area condom Or refrain from having sex for at least 6 months.

However, the guidelines are based on data showing their genetic traces. Zika virus It is found in semen 180 days after infection.

New data shows actual infectivity Zika Dr. Paul Mead, a CDC epidemiologist and senior researcher at Fort Collins, Colorado, said particles remain in semen for much less time than these non-infectious genetic traces.

Infectious Zika virus Particles are rarely found in semen and appear to be removed within a month of infection, according to Mead.

“Based on this new information, we will certainly reassess those guidelines,” he added. “Consider to see if the recommendations need to be changed.”

Zika Viruses generally cause mild Like flu It is ill and one in five people go unnoticed.

However, the virus can be a catastrophic cause Birth defects when Pregnant Women are infected.Most notable are neurological defects Microcephaly, A state in which the brain and skull are underdeveloped.

Zika Most are transmitted through mosquitoes, but rarely sexually transmitted infections occur. In 2016, authorities focused on 45 cases of sexually transmitted diseases Zika Infectious diseases in the United States are among the 5,168 confirmed infectious diseases.

To learn more about how long Zika CDC researchers took 1,327 samples from 184 Zika-positive men because they remained in the semen.

According to Mead, investigators used two tests to track the presence of Zika in these samples.

“One detects infectious virus particles and the other examines the genetic material that is the RNA of the virus, which can be found even if the virus can no longer cause infection.” Mr. Mead said.

Researchers reported that Zika RNA was detected in about one-third of all men and in two-thirds of men tested within a month of being infected with the virus.

But infectious Zika virus As such, it was detected in only three of the 78 samples of semen tested positive for Zika RNA. And it was only detected in samples obtained within a month of the onset of the disease, the findings showed.

For now, the CDC guidelines remain the same, but officials said authorities are reassessing their guidance based on this and other studies. New guidelines may be released in the coming months.

“This can be a very serious illness in the following situations: pregnancy “For now, it’s important for people to follow current recommendations,” Mead said.

This study was published in the April 12 issue. New England Journal of Medicine..

Research results show that better techniques must be developed to track human Zika fever, Dr. Heinzfeldman said.He is responsible for virology at the National Institute of America Allergies And infectious diseases.

“Our diagnostic tools most often do not detect the infectious virus. The main problem remains. Whether the presence of the genome is detected and a positive sample by molecular means can infect the patient with the infectious virus. It’s hard to tell if it’s an indication, “says Feldman. I wrote an editorial accompanying the CDC study.

“Without testing for infectious viruses, the presence of genomic material in semen does not necessarily indicate the presence of infectious viruses, so it is not always possible to actually identify the risk of infection.” He explained.

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Source: Paul Mead, MD, MPH, Epidemiologist, Centers for Disease Control and Prevention, Fort Collins, Colorado. Heinz Feldmann, MD, National Institute of Allergy and Infectious Diseases, Bethesda, Dean of Virology, Maryland. April 12, 2018, New England Journal of Medicine

Zika may stay in semen for a shorter period of time than expected: research

Source link Zika may stay in semen for a shorter period of time than expected: research

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