Evidence for enzootic circulation of Rift Valley fever virus among livestock in Cameroon

Rissmann, Melanie; Eiden, Martin; Wade, Abel; Poueme, R.; Abdoulkadiri, Souley; Unger, Hermann; Ziegler, Ute; Homeier, Timo; Groschup, Martin H.

doi:10.1016/j.actatropica.2017.04.001

Cited by 23 publications

(36 citation statements)

References 20 publications

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“…Clinically apparent infections are mainly observed in sheep, goats, cattle and camels in which they manifest high neonatal deaths and high rate of abortion. RVFV circulation has been repeatedly reported in domestic and wild animals in Cameroon from 1967 to 2017 based on serological [ 1 – 4 ] and molecular [ 4 ] evidences. With respect to humans, RVFV-specific antibodies were detected in urban populations from southwestern and northern Cameroon [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Serological evidence of rift valley fever Phlebovirus and Crimean-Congo hemorrhagic fever orthonairovirus infections among pygmies in the east region of Cameroon

Sadeuh-Mba

Wansi

Demanou

et al. 2018

Virol J

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BackgroundRift Valley Fever Phlebovirus (RVFV) and Crimean-Congo Hemorrhagic Fever Orthonairovirus (CCHFV) specific antibodies had been documented among humans in urban settings of the southwestern and northern Cameroon in the late 1980s. Recently, evidence for enzootic circulation of RVFV was reported among livestock in both rural and urban settings in Cameroon. However, current estimates of human exposure to RVFV and CCHFV are still to be documented in Cameroon, especially in rural areas. The aim of this study was to assess the seroprevalence of RVFV and CCHFV in rural settings in the Southeastern rain forest of Cameroon.ResultsUsing Enzyme-linked Immunosorbent Assays, the presence of RVFV and CCHFV Immunoglobulin G antibodies was investigated in plasma samples originating from 137 Pygmies from four villages of the East region of Cameroon. The studied population was found to be 12.4% (17/137) and 4.4% (6/137) seropositive for RVFV and CCHFV, respectively. The rates of RVFV IgG were comparable between the age groups and sex. Conversely, the rate of CCHFV IgG was significantly higher among the 41–60 years old participants (p = 0.02).ConclusionsThis study provides a substantial evidence of the circulation of RVFV and CCHFV among rural inhabitants of the East region of Cameroon.

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Section: Introductionmentioning

confidence: 99%

Serological evidence of rift valley fever Phlebovirus and Crimean-Congo hemorrhagic fever orthonairovirus infections among pygmies in the east region of Cameroon

Sadeuh-Mba

Wansi

Demanou

et al. 2018

Virol J

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“…In fact, although not endemic, cases of Rift Valley fever (RVF) are increasingly detected by the national veterinary laboratory of Cameroon in ruminants mainly in the North region. Evidence of the circulation of RVF virus in Cameroon was demonstrated in 2017 on samples collected in years 2013 and 2014 on small ruminants and cattle [36]. Few years ago, some authors had shown the presence of RVF virus in goats in forests of South region Cameroon [37] and others in domestic ruminants in Chad [38].…”

Section: Emerging Vector-borne Diseases and Epidemicsmentioning

confidence: 99%

Emerging Vector-Borne Diseases in Central Africa: A Threat to Animal Production and Human Health

Tongue¹,

Ngapagna²

2020

Vector-Borne Diseases - Recent Developments in Epidemiology and Control

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Although the potential for livestock production is high in Central Africa, it is not an important economic activity because of disease constraints, primarily trypanosomiasis transmitted by tsetse flies. Recently, a growing number of vector-borne diseases have also emerged in that region. Indeed, there is a progressive expansion of trypanosomiasis in known tsetse-free areas in the Far North of Cameroon, mechanically transmitted by Tabanidae. In the beginning of year 2019, there was an epidemic of African horse sickness (AHS) in Cameroon for the first time. In the meantime, AHS was also declared in Chad and reported in Nigeria. Besides, new cases of Rift Valley fever (RVF) are regularly detected in both Cameroon and Chad. The relative significance of most vector-borne diseases (VBDs) in livestock is difficult to quantify, because there is no study on their socioeconomic impact. But, certain VBDs have significant impact on food production, and others such as RVF can be transmitted to humans. Impact of VBDs on human health, animal health and trade, as well as the transboundary nature of these diseases means there is a need for regional coordination and cooperation to address challenges. This can be successfully achieved with One Health approach.

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“…The material for this study included 518 blood serum and 37 abort fetus from different animal species between July 2009 and September 2010. In the study, RVFV infection was investigated serologically and pathologically in cattle (178 Holstein), sheep (160 native race), goats (66 ordinary goats, 98 Honamli goats, 16 Saanen goats) with an abortion history and in unborn cattle (8), sheep (24) and goat (5) fetus.…”

Section: Animal Materialsmentioning

confidence: 99%

“…Scott et al [17] found RVF seropositivity at a rate of 5.74% in their study they performed on sheep located in Nile Delta. Rissmann et al [16] stated that the infection progressed at the rates of 3.4% in small ruminants and 13.5% in cattle in Cameroon. In the same study, viremia was also detected by molecular methods in one small ruminant and three cattle.…”

Section: Discuss the Implication Of Distribution Of Positivitymentioning

confidence: 99%

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Investigation of Rift Valley Fever Virus Infection Serologically and Pathologically in Aborted Cattle, Sheep, Goats and in Fetuses

Kale

Hasırcıoğlu

Özmen

et al. 2020

ARRB

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In this study, Rift Valley Fever Virus (RVFV) infection was searched serologically and pathologically in cattle (178 Holstein), sheep (160 native), goats (66 ordinary goats, 98 Honamli goats, 16 Saanen goats) with an abortion history and in unborn cattle (8), sheep (24) and goat (5) fetus. Samples were collected between July 2009 and September 2010. As a result of studying specific antibodies to RVFV by using the c-ELISA method in blood serum samples collected from cattle, sheep and goats suffering abortion, seropositivity was identified in 7 cattle (7/178; 3.93%), 4 sheep (4/160;2.50%) and 18 goats (18/180;10.0%). 18 seropositive goats were distributed according to race as 13 ordinary goats (19.70%), 2 Honamli goats (2.04%) and 3 Saanen goats (18.75%). When liver, spleen and brain samples of the unborn fetus of cattle, sheep and goats were studied histopathologically, no pathological findings on RVFV disease were obtained. Consequently, in this study, where RVFV infection in cattle, sheep and goats raised in Western Mediterranean Region of Turkey was serologically revealed, it was concluded that RVFV did not take place in the aetiology of abortion cases in relevant species.

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Evidence for enzootic circulation of Rift Valley fever virus among livestock in Cameroon

Cited by 23 publications

References 20 publications

Serological evidence of rift valley fever Phlebovirus and Crimean-Congo hemorrhagic fever orthonairovirus infections among pygmies in the east region of Cameroon

Serological evidence of rift valley fever Phlebovirus and Crimean-Congo hemorrhagic fever orthonairovirus infections among pygmies in the east region of Cameroon

Emerging Vector-Borne Diseases in Central Africa: A Threat to Animal Production and Human Health

Investigation of Rift Valley Fever Virus Infection Serologically and Pathologically in Aborted Cattle, Sheep, Goats and in Fetuses

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