Samstag, Juli 30, 2022
StartEvolutionExamine exhibits dengue virus can decrease sperm manufacturing in males

Examine exhibits dengue virus can decrease sperm manufacturing in males

A current research revealed within the journal Rising Infectious Illnesses helps the notion that the dengue virus could be sexually transmissible for a brief interval after acute dengue sickness and that it might additionally trigger alterations in sperm manufacturing.

Examine: Results of Acute Dengue An infection on Sperm and Virus Clearance in Physique Fluids of Males. Picture Credit score: Kateryna Kon/Shutterstock


Dengue is a viral illness transmitted by mosquitoes that’s widespread in areas with tropical climates all over the world. Since it’s endemic in a couple of hundred international locations, the World Well being Group (WHO) considers it one of many salient international well being points.

Most people contaminated with the dengue virus are asymptomatic or current with a gentle type of the illness with indicators and signs akin to influenza (e.g., fever, headache, muscle and joint pains, nausea, fatigue). Nonetheless, in a small variety of affected individuals, the illness can grow to be severe and even deadly.

However mosquitoes usually are not the one means how the virus could be transmitted. For instance, vertical transmission from pregnant ladies to their fetuses has been described, which ends up in larger charges of preterm births and miscarriages.

Moreover, the transmission can happen through blood merchandise, needlestick damage or blood transfusion. Nonetheless, extra controversial subject is potential sexual transmission that has been just lately hinted in medical literature. Through the use of this route, would the virus exert a further affect on reproductive well being?

A gaggle of scientists, led by Dr. Joffrey Mons from the Groupe Hospitalier Sud Réunion in St. Pierre (France), aimed to handle considered one of these pertinent questions by appraising the results of acute dengue an infection on sperm and viral clearance in physique fluids of affected males.

Appraising spermatozoids and hormones

In a nutshell, this potential research exhibits outcomes from a longitudinal appraisal of varied biologic samples (equivalent to complete blood, urine, and semen) and stories the traits of semen and reproductive hormones following the acute an infection with dengue virus in males.

The researchers have additionally documented the detection and clearance of viral genetic materials in numerous fractions of the semen, in addition to the presence of replicative virus (together with in motile spermatozoids). Samples had been collected 7, 15, 30, 60, and 90 days after illness signs have began in ten contaminated volunteers on Réunion Island.

Semen samples have been analyzed for dengue virus with the usage of reverse transcription-polymerase chain response (PCR), and likewise examined for dengue virus ribonucleic acid (RNA) by virus isolation in Vero E6 cell cultures established from kidney epithelial cells of the African inexperienced monkey.

Decrease sperm manufacturing, however no RNA in motile sperm cells

On this research, the researchers have discovered that sperm manufacturing within the context of dengue an infection really diminished roughly thirty days after symptom onset. Furthermore, though there have been no vital disturbances in reproductive hormone ranges, a considerable lower within the testosterone/LH ratio would possibly level to refined dysfunction of Leydig cells discovered within the testes.

Spermatozoids, non-sperm cells, and seminal plasma from sufferers included within the research have been constructive for dengue virus RNA, however not motile spermatozoa cell fractions. This suggests that both the dengue virus has not been related to motile spermatozoa, or the viral load was nicely beneath the detection threshold.

This can be a relatively vital discovering, as sperm processing strategies which are employed for assisted reproductive know-how appear to be efficient for isolating spermatozoa freed from dengue virus, as is the case for a number of different notable viruses.


In conclusion, the genetic materials of the dengue virus has been present in semen as much as thirty days after symptom onset; nonetheless, it was not related to motile sperm cells. In fact, there are some research limitations, equivalent to, low variety of sufferers, no management group, delicate signs, however these insights are fairly invaluable.

These findings emphasize the necessity for additional research on this discipline and still have implications for public well being coverage, equivalent to contributing to elevated diagnostic effectivity and limiting sexual transmission of dengue virus”, mentioned research authors.

“Lastly, our findings present data related to counseling dengue virus-infected sufferers and {couples} who want to conceive a baby”, they added.

Because the physique of information addressing the interactions between the dengue virus and the reproductive tract continues to be in its infancy, analysis endeavors like this one undoubtedly shed the sunshine on what function viruses transmitted by mosquitos can really play inside the human reproductive tract.


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