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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Temporal analysis of Lassa virus infection and transmission in experimentally infected Mastomys natalensis
PNAS Nexus, Volume 1, No. 3, Article pgac114, Year 2022
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Description
Little is known about the temporal patterns of infection and transmission of Lassa virus (LASV) within its natural reservoir (Mastomys natalensis). Here,we characterize infection dynamics and transmissibility of a LASV isolate (Soromba-R) in adult lab-rearedM. natalensis originating from Mali. The lab-reared M. natalenesis proved to be highly susceptible to LASV isolates from geographically distinct regions of West Africa via multiple routes of exposure, with 50% infectious doses of < 1 TCID50. Postinoculation, LASV Soromba- R established a systemic infection with no signs of clinical disease. Viral RNA was detected in all nine tissues examined with peak concentrations detected between days 7 and 14 postinfectionwithin most organs. Therewas an overall trend toward clearance of virus within 40 days of infection inmost organs. The exception is lung specimens,which retained positivity throughout the course of the 85- day study. Direct (contact) and indirect (fomite) transmission experiments demonstrated 40% of experimentally infected M. natalensis were capable of transmitting LASV to na ve animals, with peak transmissibility occurring between 28 and 42 days post-inoculation. No differences in patterns of infection or transmission were noted between male and female experimentally infected rodents. Adult lab-reared M. natalensis are highly susceptible to genetically distinct LASV strains developing a temporary asymptomatic infection associated with virus shedding resulting in contact and fomite transmission within a cohort. © 2022 Authors. All rights reserved.
Authors & Co-Authors
Safronetz, David
Canada, Ottawa
Public Health Agency of Canada
Rosenke, Kyle
United States, Bethesda
National Institutes of Health Nih
Meade-White, Kimberly D.
United States, Bethesda
National Institutes of Health Nih
Sloan, Angela M.
Canada, Ottawa
Public Health Agency of Canada
Maïga, Ousmane
Mali, Bamako
University of Sciences Techniques and Technologies of Bamako
Bane, Sidy
Mali, Bamako
University of Sciences Techniques and Technologies of Bamako
Martellaro, Cynthia
United States, Bethesda
National Institutes of Health Nih
Scott, Dana P.
United States, Bethesda
National Institutes of Health Nih
Sogoba, Nafomon
Mali, Bamako
University of Sciences Techniques and Technologies of Bamako
Feldmann, Heinz
United States, Bethesda
National Institutes of Health Nih
Statistics
Citations: 1
Authors: 10
Affiliations: 3
Identifiers
Doi:
10.1093/pnasnexus/pgac114
ISSN:
27526542
Study Design
Cohort Study
Study Locations
Multi-countries
Mali
Participants Gender
Male
Female