COVID-19 not transmitted by mosquitoes, says study

A recently published study by researchers from Kansas State University has become the first to confirm that SARS-CoV-2, which causes COVID-19, cannot be transmitted to people by mosquitoes. The study found that the virus is unable to replicate in three common and widely distributed species of mosquitoes — Aedes aegypti, Aedes albopictus and Culex quinquefasciatus — and therefore cannot be transmitted to humans. The findings were published on July 17 by Nature Scientific Reports.

Hyderabad:A new study by Kansas State University researchers is the first to confirm that SARS-CoV-2 cannot be transmitted to people by mosquitoes.

Stephen Higgs, associate vice president for research and director of the university's Biosecurity Research Institute, or BRI, together with colleagues from the BRI and the College of Veterinary Medicine had the findings published July 17 by Nature Scientific Reports.

The article, "SARS-CoV-2 failure to infect or replicate in mosquitoes: an extreme challenge," details the study's findings, which provide the first experimental investigation on the capacity of SARS-CoV-2, the virus that causes COVID-19 disease, to infect and be transmitted by mosquitoes.

"While the World Health Organization has definitively stated that mosquitoes cannot transmit the virus, our study is the first to provide conclusive data supporting the theory," said Higgs, Peine professor of biosecurity and university distinguished professor of diagnostic medicine and pathobiology.

The study, which was done at the BRI, a biosafety level-3 facility, ultimately found that the virus is unable to replicate in three common and widely distributed species of mosquitoes — Aedes aegypti, Aedes albopictus and Culex quinquefasciatus — and therefore cannot be transmitted to humans.

"I am proud of the work we are doing at K-State to learn as much as we can about this and other dangerous pathogens," said Higgs.

"This work was possible because of the unique capabilities of the BRI and the dedicated BRI and institutional staff."

Researchers at the BRI have completed four additional studies on COVID-19 since March and this is the first peer-reviewed publication based on SARS-CoV-2 experiments wholly conducted at K-State.