Survey of white-footed mice (Peromyscus leucopus) in Connecticut, USA reveals low SARS-CoV-2 seroprevalence and infection with divergent betacoronaviruses

Author:

Earnest Rebecca,Hahn Anne M.,Feriancek Nicole M.,Brandt Matthew,Filler Renata B.,Zhao Zhe,Breban Mallery I.,Vogels Chantal B. F.,Chen Nicholas F. G.,Koch Robert T.,Porzucek Abbey J.,Sodeinde Afeez,Garbiel Alexa,Keanna Claire,Litwak Hannah,Stuber Heidi R.,Cantoni Jamie L.,Pitzer Virginia E.,Olarte Castillo Ximena A.,Goodman Laura B.,Wilen Craig B.,Linske Megan A.,Williams Scott C.,Grubaugh Nathan D.

Abstract

AbstractDiverse mammalian species display susceptibility to SARS-CoV-2. Potential SARS-CoV-2 spillback into rodents is understudied despite their host role for numerous zoonoses and human proximity. We assessed exposure and infection among white-footed mice (Peromyscus leucopus) in Connecticut, USA. We observed 1% (6/540) wild-type neutralizing antibody seroprevalence among 2020–2022 residential mice with no cross-neutralization of variants. We detected no SARS-CoV-2 infections via RT-qPCR, but identified non-SARS-CoV-2 betacoronavirus infections via pan-coronavirus PCR among 1% (5/468) of residential mice. Sequencing revealed two divergent betacoronaviruses, preliminarily named Peromyscus coronavirus-1 and -2. Both belong to the Betacoronavirus 1 species and are ~90% identical to the closest known relative, Porcine hemagglutinating encephalomyelitis virus. In addition, to provide a comparison, we also screened a species with significant SARS-CoV-2 infection and exposure across North America: the white-tailed deer (Odocoileus virginianus). We detected no active coronavirus infections and 7% (4/55) wild-type SARS-CoV-2 neutralizing antibody seroprevalence. Low SARS-CoV-2 seroprevalence suggests white-footed mice may not be sufficiently susceptible or exposed to SARS-CoV-2 to present a long-term human health risk. However, the discovery of divergent, non-SARS-CoV-2 betacoronaviruses expands the diversity of known rodent coronaviruses and further investigation is required to understand their transmission extent.

Funder

National Center for Advancing Translational Sciences

Publisher

Springer Science and Business Media LLC

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