Subject: | |
From: | |
Reply To: | |
Date: | Sat, 7 May 2022 13:01:12 -0400 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
https://www.biorxiv.org/content/10.1101/2022.05.05.490834v1
Abstract
Varroa destructor is a cosmopolitan pest and leading cause of colony loss
of the European honey bee. Historically described as a competent vector of
honey bee viruses, this arthropod vector is cause for the global pandemic
of Deformed wing virus, now endemic in honeybee populations. Our work shows
viral spread is driven by Varroa actively switching from one adult bee to
another as they feed. Assays using fluorescent microspheres were used to
show the movement of fluids in both directions between host and vector when
Varroa feed. Therefore, Varroa could be in either an infectious or naive
state dependent upon the disease status of their host. We tested this and
confirm that the relative risk of a Varroa feeding was dependent on the
infectiousness of their previous host. Varroa exhibit remarkable
heterogeneity in their host switching behavior, with some Varroa switching
infrequently while others switch at least daily. As a result, relatively
few of the most active Varroa parasitize the majority of bees. This
multiple feeding behavior has analogs in vectorial capacity models of other
systems, where promiscuous feeding by individual vectors is a leading
driver of vectorial capacity. We propose that the honeybee-Varroa
relationship offers a unique opportunity to apply principles of vectorial
capacity to a social organism, as virus transmission is both vectored and
occurs through multiple host-to-host routes common to a crowded society.
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html
|
|
|