Abstract:
:Bluetongue (BT), caused by bluetongue virus (BTV), is a vector-borne disease of small ruminants that has the potential to spread across international borders. Despite large populations of susceptible animals and borders with BTV endemic countries, little is known of the disease burden and prevalent serotypes in the province of Balochistan in Pakistan. We conducted a cross-sectional study to determine seroconversion and prevalent serotypes in selected districts of the province using a competitive enzyme-linked immunosorbent assay (cELISA) and real-time polymerase chain reaction (RT-PCR). Sera (n = 876) were collected from clinically healthy sheep and goats originating from the districts of Quetta (n = 300), Mastung (n = 201), Killa Saifullah (n = 75) and Kech (n = 300). None of the study herds (n = 97) were seronegative for BTV, and at the individual level, the overall prevalence of BTV seroconversion was 47.26% (n = 414/876, 95% CI = 43.92%-50.63%). A higher percentage of goats (50.87%, 95% CI = 45.99%-55.73%) were seropositive for anti-VP7 immunoglobulins (IgG) than sheep (44.21%, 95% CI = 39.81%-48.70%). Odds ratios of seroconversion for goats were associated with breed type (χ2 = 16.84, p = .01), parity (χ2 = 23.66, p = .00) and presence of vector (χ2 = 2.63, p = .10), whereas for sheep, it was associated with breed type (χ2 = 13.80, p = .01) and parity (χ2 = 53.40, p = .00). Serotype 8 was the most prevalent (26.82%, 95% CI = 14.75%-43.21%) followed by an equal prevalence of serotypes 2 and 9 (7.31%, 95% CI = 1.91%-21.01%). To the best of our knowledge, this is the first study conducted in Balochistan province and the results indicate that there is a necessity to initiate intervention strategies to control BT disease burden not only in this region of Pakistan but also in adjacent areas of the neighbouring countries, Iran and Afghanistan.
journal_name
Transbound Emerg Disjournal_title
Transboundary and emerging diseasesauthors
Sohail T,Yaqub T,Shafee M,Abbas T,Nazir J,Ullah N,Rabbani M,Chaudhary MH,Mukhtar N,Habib M,Ul Rahman A,Malik AI,Ghafoor A,Zahoor MY,Shabbir MZdoi
10.1111/tbed.12871subject
Has Abstractpub_date
2018-10-01 00:00:00pages
1272-1281issue
5eissn
1865-1674issn
1865-1682journal_volume
65pub_type
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