Abstract
Background: Classical swine fever (CSF) is caused by small enveloped RNA virus that belongs to the Flaviviridae family and causes high morbidity and mortality events for pig farming. In India, it is highly prevalent but with varied distribution in various geographical areas resulting in substantial economic losses to farmers. The discrepancy in prevalence estimates across studies needs to be evaluated in order to strengthen the prevention and control strategies of CSF in pigs. The aim of the present study was to provide the pooled estimate of the prevalence of classical swine fever (CSF) in India and to examine the consistency of those estimates between published studies. Methods: The data regarding prevalence of CSF in 7045 pigs were compiled from 22 published studies using comprehensive literature search for period from 1998 to 2018. The pooled prevalence of CSF was obtained under random effects model and heterogeneity between studies was determined using I² Index. Representation of meta-analysis was done using forest plot and followed by funnel plot, Baujat plot and radial plot. Result: The result of Meta-analysis revealed that pooled estimate of prevalence of CSF under random effects model was 45% (95% confidence interval: 35, 55%) in India. The heterogeneity statistic (Q) was found to be significant (p less than 0.001) with I² = 98% which indicated that prevalence of CSF was inconsistent between the studies. Likewise, results of funnel plot and Radial plot indicated heterogeneity between studies. Most influential studies for overall heterogeneity were identified using Baujat and radical plots.
Published Version
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