Author:
de Glanville William A.,Allan Kathryn J.,Nyarobi James M.,Thomas Kate. M.,Lankester Felix,Kibona Tito,Claxton John R.,Brennan Benjamin,Carter Ryan W.,Crump John A.,Halliday Jo E.B.,Ladbury Georgia,Mmbaga Blandina T.,Mramba Furaha,Nyasebwa Obed M.,Rubach Matthew P.,Rostal Melinda K.,Sanka Paul,Swai Emmanuel S.,Szemiel Agnieszka M.,Willett Brian J.,Cleaveland Sarah
Abstract
AbstractUndetected Rift Valley fever (RVF) outbreaks are expected in endemic countries but little is known about their size or frequency. We describe a previously unreported RVF outbreak involving dairy cattle that appeared to be limited to the edge of the town of Moshi, Tanzania and occurred from May through August, 2018. The outbreak was detected retrospectively using samples collected as part of a cohort study investigating the causes of livestock abortion across northern Tanzania. A total of 14 RVF-associated cattle abortions were identified using a combination of serology and quantitative reverse transcription PCR (RT-qPCR). Milk samples from three (21%) of 14 cases were also RT-qPCR positive. Genotyping revealed circulation of RVF viruses from two lineages. The occurrence of an RVF outbreak among peri-urban dairy cattle, and evidence for RVF viral shedding in milk, highlights the potential for emerging zoonotic risks associated with the growth of urban and peri-urban livestock populations.
Publisher
Cold Spring Harbor Laboratory
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