Mosquito non-transmission

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    Mosquito non-transmission
Date: Fri 17 Jul 2020
Source: Nature Scientific Reports [edited]
https://www.nature.com/articles/s41598-020-68882-7

ref: Huang YS, Vanlandingham DL, Bilyeu AN, et al. SARS-CoV-2 failure
to infect or replicate in mosquitoes: an extreme challenge. Sci Rep.
2020; 10(1): 11915. doi:10.1038/s41598-020-68882-7
--------------------------------------------------------------------------------
Abstract
--------
This research addresses public speculation that SARS-CoV-2 might be
transmitted by mosquitoes. The World Health Organization has stated
"To date there has been no information nor evidence to suggest that
the new coronavirus could be transmitted by mosquitoes." Here we
provide the 1st experimental data to investigate the capacity of
SARS-CoV-2 to infect and be transmitted by mosquitoes including tests
of 3 widely distributed species of mosquito; _Aedes aegypti_, _Ae.
albopictus_, and _Culex quinquefasciatus_, representing the 2 most
significant genera of arbovirus vectors that infect people.

We demonstrate that even under extreme conditions, SARS-CoV-2 virus is
unable to replicate in these mosquitoes and therefore cannot be
transmitted to people even in the unlikely event that a mosquito fed
upon a viremic host.
[more at link]

Note:  Although the tests indicated SARS-CoV-2 virus was unable to replicate
in 3 common vector mosquitoes of 2 different genera, one cannot
arbitrarily rule out susceptibility of all human-biting mosquitoes in
localities where infected people are found.

However, the results of
the test above do strongly suggest that mosquitoes in general are not
susceptible to infection by this virus. This should end speculation
about mosquito biological transmission of SARS-CoV-2 virus being
epidemiologically significant. 

Mechanical ("flying pin") transmission
by interrupted mosquito feeding would require very high viremias in
infected individuals, probably 10^6-7 or more and for which there is
no evidence, followed almost immediately by feeding on a susceptible
person. Attention should be turned to other modes of virus
transmission. 

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Tabitha111 Members Profile Send Private Message Find Members Posts Add to Buddy List Adviser Group Joined: January 11 2020 Location: Virginia Status: Offline Points: 11640	Post Options Post Reply Quote Tabitha111 Report Post Thanks(0) Quote Reply Topic: Mosquito non-transmission Posted: July 21 2020 at 7:39am
	Mosquito non-transmission Date: Fri 17 Jul 2020 Source: Nature Scientific Reports [edited] https://www.nature.com/articles/s41598-020-68882-7 ref: Huang YS, Vanlandingham DL, Bilyeu AN, et al. SARS-CoV-2 failure to infect or replicate in mosquitoes: an extreme challenge. Sci Rep. 2020; 10(1): 11915. doi:10.1038/s41598-020-68882-7 -------------------------------------------------------------------------------- Abstract -------- This research addresses public speculation that SARS-CoV-2 might be transmitted by mosquitoes. The World Health Organization has stated "To date there has been no information nor evidence to suggest that the new coronavirus could be transmitted by mosquitoes." Here we provide the 1st experimental data to investigate the capacity of SARS-CoV-2 to infect and be transmitted by mosquitoes including tests of 3 widely distributed species of mosquito; _Aedes aegypti_, _Ae. albopictus_, and _Culex quinquefasciatus_, representing the 2 most significant genera of arbovirus vectors that infect people. We demonstrate that even under extreme conditions, SARS-CoV-2 virus is unable to replicate in these mosquitoes and therefore cannot be transmitted to people even in the unlikely event that a mosquito fed upon a viremic host. [more at link] Note: Although the tests indicated SARS-CoV-2 virus was unable to replicate in 3 common vector mosquitoes of 2 different genera, one cannot arbitrarily rule out susceptibility of all human-biting mosquitoes in localities where infected people are found. However, the results of the test above do strongly suggest that mosquitoes in general are not susceptible to infection by this virus. This should end speculation about mosquito biological transmission of SARS-CoV-2 virus being epidemiologically significant. Mechanical ("flying pin") transmission by interrupted mosquito feeding would require very high viremias in infected individuals, probably 10^6-7 or more and for which there is no evidence, followed almost immediately by feeding on a susceptible person. Attention should be turned to other modes of virus transmission.
	'A man who does not think and plan long ahead will find trouble right at his door.' --Confucius