Sero-positivity and associated intrinsic and extrinsic drivers of Rift Valley fever occurrence in pastoral herds of Nigeria: A cross sectional survey [post]

2019 unpublished
Rift Valley fever (RVF) is a vector-borne emerging zoonotic disease of animals and humans characterized by major socioeconomic losses to livestock farmers, with potential global public health threat. The study assessed herders' existing knowledge, sero-prevalence and factors influencing the occurrence of RVF in cattle herds. Methods: A cross-sectional study using questionnaire and determination of IgM was conducted among pastoral herds. Frequencies and proportions were used for descriptive
more » ... or descriptive analysis. Categorical variables were presented as proportions and their associations determined by Chi-square tests. Associations were analyzed by univariable tests and multivariable logistic regressions analysis at 95% confidence level. Results: All 403 pastoralists (50.5±15.5 years) participated in this study with the majority of respondents being male, married and had no formal education. The majority of the pastoralists reported low knowledge about zoonotic RVF infections. The within-herd seropositivity of RVF in Nigeria is 5.6% which was higher under nomadic (7.4%) than agropastoral (3.8%) settings. All animal demographic characteristics of age, sex and breeds were not significantly (p>0.05) associated with occurrence of RVF in pastoral cattle herds. However, all the socio-ecological factors significantly (p<0.05) influenced RVF occurrence in pastoral settlements. However, availability of mosquitoes in the pastoral environments (OR=7.81; 95% CI: 4.85, 12.37), presence of rivers and streams in grazing fields (OR=10.80; 95% CI: 6.77, 17.34), high rainfall (OR=4.30; 95% CI: 2.74, 6.59), irrigated rice fields (OR=5.14; 95% CI: 3.21, 7.79) and bushy vegetation and (OR=6.11; 95% CI: 3.96, 9.43), animal movement (OR=2.2; 95% CI: 1.45, 3.25) and seasonal variations (OR=2.34; 95% CI: 1.55, 3.51) were more likely to influence RVF occurrence in pastoral herds. Conclusions: This study highlighted low levels of knowledge about RVF among surveyed
doi:10.21203/rs.2.15982/v1 fatcat:shkmw7g7bzdirfpnyl3nbfojla