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An outbreak of Rift Valley fever among peri-urban dairy cattle in northern Tanzania.

Publication ,  Journal Article
de Glanville, WA; Allan, KJ; Nyarobi, JM; Thomas, KM; Lankester, F; Kibona, TJ; Claxton, JR; Brennan, B; Carter, RW; Crump, JA; Halliday, JEB ...
Published in: Trans R Soc Trop Med Hyg
November 1, 2022

BACKGROUND: Human and animal cases of Rift Valley fever (RVF) are typically only reported during large outbreaks. The occurrence of RVF cases that go undetected by national surveillance systems in the period between these outbreaks is considered likely. The last reported cases of RVF in Tanzania occurred during a large outbreak in 2007-2008. METHODS: Samples collected between 2017 and 2019 from livestock suffering abortion across northern Tanzania were retrospectively tested for evidence of RVF virus infection using serology and reverse transcription quantitative polymerase chain reaction (RT-qPCR). RESULTS: A total of 14 RVF-associated cattle abortions were identified among dairy cattle in a peri-urban area surrounding the town of Moshi. RVF cases occurred from May to August 2018 and were considered to represent an undetected, small-scale RVF outbreak. Milk samples from 3 of 14 cases (21%) were found to be RT-qPCR positive. Genotyping revealed circulation of RVF viruses from two distinct lineages. CONCLUSIONS: RVF outbreaks can occur more often in endemic settings than would be expected on the basis of detection by national surveillance. The occurrence of RVF cases among peri-urban dairy cattle and evidence for viral shedding in milk, also highlights potentially emerging risks for RVF associated with increasing urban and peri-urban livestock populations.

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Published In

Trans R Soc Trop Med Hyg

DOI

EISSN

1878-3503

Publication Date

November 1, 2022

Volume

116

Issue

11

Start / End Page

1082 / 1090

Location

England

Related Subject Headings

  • Tropical Medicine
  • Tanzania
  • Rift Valley fever virus
  • Rift Valley Fever
  • Retrospective Studies
  • Livestock
  • Humans
  • Disease Outbreaks
  • Cattle
  • Animals
 

Citation

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de Glanville, W. A., Allan, K. J., Nyarobi, J. M., Thomas, K. M., Lankester, F., Kibona, T. J., … Cleaveland, S. (2022). An outbreak of Rift Valley fever among peri-urban dairy cattle in northern Tanzania. Trans R Soc Trop Med Hyg, 116(11), 1082–1090. https://doi.org/10.1093/trstmh/trac076
Glanville, William A. de, Kathryn J. Allan, James M. Nyarobi, Kate M. Thomas, Felix Lankester, Tito J. Kibona, John R. Claxton, et al. “An outbreak of Rift Valley fever among peri-urban dairy cattle in northern Tanzania.Trans R Soc Trop Med Hyg 116, no. 11 (November 1, 2022): 1082–90. https://doi.org/10.1093/trstmh/trac076.
de Glanville WA, Allan KJ, Nyarobi JM, Thomas KM, Lankester F, Kibona TJ, et al. An outbreak of Rift Valley fever among peri-urban dairy cattle in northern Tanzania. Trans R Soc Trop Med Hyg. 2022 Nov 1;116(11):1082–90.
de Glanville, William A., et al. “An outbreak of Rift Valley fever among peri-urban dairy cattle in northern Tanzania.Trans R Soc Trop Med Hyg, vol. 116, no. 11, Nov. 2022, pp. 1082–90. Pubmed, doi:10.1093/trstmh/trac076.
de Glanville WA, Allan KJ, Nyarobi JM, Thomas KM, Lankester F, Kibona TJ, Claxton JR, Brennan B, Carter RW, Crump JA, Halliday JEB, Ladbury G, Mmbaga BT, Mramba F, Nyasebwa OM, Rubach MP, Rostal MK, Sanka P, Swai ES, Szemiel AM, Willett BJ, Cleaveland S. An outbreak of Rift Valley fever among peri-urban dairy cattle in northern Tanzania. Trans R Soc Trop Med Hyg. 2022 Nov 1;116(11):1082–1090.
Journal cover image

Published In

Trans R Soc Trop Med Hyg

DOI

EISSN

1878-3503

Publication Date

November 1, 2022

Volume

116

Issue

11

Start / End Page

1082 / 1090

Location

England

Related Subject Headings

  • Tropical Medicine
  • Tanzania
  • Rift Valley fever virus
  • Rift Valley Fever
  • Retrospective Studies
  • Livestock
  • Humans
  • Disease Outbreaks
  • Cattle
  • Animals