Norovirus Update – Can the Virus be Passed from Dog to Human?

Norovirus—the phrase alone could be sufficient to make you a bit
nauseous. In line with the USA Middle for Illness
Management and Prevention (CDC), noroviruses (there are
many sorts) are the “main reason behind sickness and outbreaks
from contaminated meals in the USA.” Individuals may
turn out to be contaminated with norovirus by way of touching contaminated
surfaces or by having contact with somebody who’s contaminated with
norovirus. The CDC estimates that as few as 18 virus particles
could also be sufficient to trigger sickness in individuals, which explains why
norovirus infections (typically mistakenly referred to as the “abdomen
flu”) are usually extremely contagious, rampaging their approach by way of
houses, faculties, companies, cruise ships, and so on.


The signs of norovirus an infection in persons are downright
nasty. Vomiting, diarrhea, fever, headache, and physique aches are
widespread and have a tendency to final wherever from one to a few days. If
you’ve lived with canines for lengthy sufficient, you’ve most likely
noticed them having comparable signs, maybe even proper
earlier than, throughout, or after you’ve been sick. Below these
circumstances, it’s affordable to surprise if canines can get
norovirus and, if that’s the case, whether or not the virus might be handed between
individuals and canines.


First, some clarification is required. Canine (and cats) seem to
have a number of of their very own species of norovirus that trigger
gastrointestinal signs much like these described above. The
query we’re asking right here is whether or not or not viruses that we’ve
assumed can solely infect one species (or intently associated
species) can really transfer between canines, cats, individuals, and so on. Why
is that this essential? If it proves to be true, we’d know that
when canines in a family turn out to be contaminated with norovirus, individuals
may very well be in danger for an infection, and vice versa.


A number of scientific papers have not too long ago been revealed that
try to reply this query.


In 2012, a gaggle of researchers in Helsinki, Finland checked out
92 stool samples from canines dwelling intently with individuals who had
not too long ago skilled signs of vomiting and diarrhea. They
screened these samples for a number of several types of human
norovirus and located human norovirus in “4 faecal samples
from pet canines that had been in direct contact with
symptomatic individuals…. All NoV [norovirus]-positive canines lived
in households with babies and two canines confirmed gentle


The research’s authors concluded that human noroviruses “can
survive within the canine gastrointestinal tract. Whether or not these
viruses can replicate in canines stays unresolved, however an
affiliation of pet canines enjoying a job
in transmission of NoVs that infect people is


One other fascinating paper appeared in 2015 and was titled
“Proof for Human Norovirus An infection of Canine within the United
Kingdom.” The analysis confirmed that human norovirus may certainly
bind to canine gastrointestinal tissues and that 13% of the
canines within the research had antibodies towards human norovirus in
their bloodstream, a sign that that they had been beforehand
contaminated. Apparently, the kinds of human noroviruses that
the canines had been contaminated with intently mirrored the kinds of
noroviruses that had been circulating in individuals of their


Whereas the scientists didn’t discover proof that human norovirus
may very well be transmitted by way of canine feces, this research does present
that it’s no less than theoretically attainable for canines to behave as a
reservoir for human norovirus.


Since then, there have been no additional reviews of human
norovirus infections in canines (or cats), however this actually is a
subject that deserves extra consideration. And till we all know for positive
whether or not noroviruses have the power to maneuver between species,
it solely is smart to follow meticulous hygiene if anybody in
the household develops vomiting or diarrhea.



Be taught extra


CDC: Making
a Norovirus Vaccine a Reality


Emory College: Norovirus
stays infective for months in water





Pet dogs–a transmission route for human noroviruses? Summa M,
von Bonsdorff CH, Maunula L. J Clin Virol. 2012


Proof for human norovirus an infection of canines within the United
Kingdom. Caddy SL, de Rougemont A, Emmott E, El-Attar L,
Mitchell JA, Hollinshead M, Belliot G, Brownlie J, Le Pendu J,
Goodfellow I. J Clin Microbiol. 2015 Jun;53(6):1873-83.

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