Climate-disease connections: Rift Valley Fever in Kenya

Anyamba, Assaf; Linthicum, Kenneth J.; Tucker, Compton J.

doi:10.1590/s0102-311x2001000700022

Cited by 114 publications

(65 citation statements)

References 19 publications

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“…26 Because analysis of historical data indicated that most RVF outbreaks occurred during warm El Niño/Southern Oscillation (ENSO) event periods, the United States Department of Agriculture and United States Department of Defense issued an RVF alert for the region in mid-September 2006. The eastern coastal plain of mainland Tanzania has a tropical hot and humid climate with temperatures averaging 26.7°C and rainfall varying from 1,016 to 1,930 mm (40 to 76 in).…”

Section: Effect Of Hiv Status On Rvf Infectionmentioning

confidence: 99%

Epidemiologic and Clinical Aspects of a Rift Valley Fever Outbreak in Humans in Tanzania, 2007

Mohamed

Mosha²,

Mghamba³

et al. 2010

The American Journal of Tropical Medicine and Hygiene

152

165

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Abstract. In January 2007, an outbreak of Rift Valley fever (RVF) was detected among humans in northern Tanzania districts. By the end of the outbreak in June, 2007, 511 suspect RVF cases had been recorded from 10 of the 21 regions of Tanzania, with laboratory confirmation of 186 cases and another 123 probable cases. All confirmed RVF cases were located in the north-central and southern regions of the country, with an eventual fatality rate of 28.2% ( N = 144). All suspected cases had fever; 89% had encephalopathy, 10% hemorrhage, and 3% retinopathy. A total of 169 (55%) of the 309 confirmed or probable cases were also positive for malaria as detected by peripheral blood smear. In a cohort of 20 RVF cases with known outcome that were also positive for human immunodeficiency virus, 15 (75%) died. Contact with sick animals and animal products, including blood, meat, and milk, were identified as major risk factors of acquiring RVF.

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Section: Effect Of Hiv Status On Rvf Infectionmentioning

confidence: 99%

Epidemiologic and Clinical Aspects of a Rift Valley Fever Outbreak in Humans in Tanzania, 2007

Mohamed

Mosha²,

Mghamba³

et al. 2010

The American Journal of Tropical Medicine and Hygiene

152

165

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“…However, in some instances, these areas may experience a dramatic increase in the rainfall, in association with El Niño southern oscillation phenomenon, leading to floods and a surge in mosquito population and thus increase the risk of RVFPV transmission to both animals and humans [51]. …”

Section: Discussionmentioning

confidence: 99%

High seroprevalence of Rift Valley fever phlebovirus in domestic ruminants and African Buffaloes in Mozambique shows need for intensified surveillance

Moiane

Mapaco

Thompson

et al. 2017

Infection Ecology & Epidemiology

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Introduction: Rift Valley fever (RVF) is an arthropod-borne disease that affects both animals and humans. RVF phlebovirus (RVFPV) is widespread in Africa and Arabian Peninsula. In Mozambique, outbreaks were reported in South; seroprevalence studies performed in livestock and water buffaloes were limited to central and south regions. We evaluated the seroprevalence of RVFPV among domestic ruminants and African buffaloes from 7 of 10 provinces of Mozambique, to understand the distribution of RVFPV and provide data for further RVF control programs. Materials and methods: A total of 1581 blood samples were collected in cattle, 1117 in goats, 85 in sheep and 69 in African buffaloes, between 2013 and 2014, and the obtained sera were analyzed by ELISA. Results and discussion: The overall seroprevalence of RVFPV domestic ruminants and African buffaloes was 25.6%. The highest was observed in cattle (37.3%) and African buffaloes (30.4%), which were higher than in previous studies within Mozambique. In south and central regions, the overall seroprevalences were higher (14.9%–62.4%) than in the north. Conclusion: This study showed the presence of anti-RVFPV antibodies in animals from all sampled provinces, suggesting that RVFPV is actively circulating among domestic ruminants and African buffaloes in Mozambique, therefore surveillance should be intensified.

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“…In South America, for example, following the abundant rainfall that marked the El Niño Southern Oscillation (ENSO) there came about a corresponding increase in Aedes mosquito populations [90,91] while in Senegal and Niger, a lower incidence of malaria was attributed to diminished mosquito populations following reduced amounts of rainfall [92,93].…”

Section: Vector Diversity and Vector Borne Diseasesmentioning

confidence: 99%