Seroprevalence of bluetongue in north eastern Indian state- Assam

Joardar, Siddhartha Narayan; Barkataki, Biswajit; Halder, Arkendu; Lodh, Chandan; Sarma, Dipak Kumar

doi:10.5455/vetworld.2013.196-199

Cited by 23 publications

(25 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This level of seroprevalence is much lower than that recorded in several states in India, where 70-89.8% of the cattle were found to be seropositive to BTV (10,14). However, previous studies in Nepal have shown similar levels of seropositivity to BTV in sheep 7 Cattle were more likely to be seropositive as their age increased.…”

Section: Discussioncontrasting

confidence: 57%

See 1 more Smart Citation

Serosurveillance and factors associated with the presence of antibodies against bluetongue virus in dairy cattle in two eco-zones of Nepal

Gaire¹,

Karki²,

Dhakal³

et al. 2016

Rev. Sci. Tech. OIE

View full text Add to dashboard Cite

Cattle play an important role in the epidemiology of bluetongue (BT) by acting as reservoir hosts. However, the status of BT virus (BTV) in dairy cattle in Nepal is unknown. The objective of this study was to estimate the prevalence of BTV antibodies in dairy cattle in two eco-zones of Nepal, and to identify the factors associated with virus exposure. The authors conducted a cross-sectional serosurvey from March 2012 through February 2013 by sampling 131 dairy cattle from seven clusters (villages) in the Chitwan district in the Terai region (southern lowlands) and the Lamjung district in the Hills region (the middle part of Nepal). Of the 131 serum samples tested, 29.3% (95% confidence interval [CI]: 21.5-37.2) were positive for BTV antibodies. Herd-level seroprevalence was 45.7% (95% CI: 30.9-61.0). Bivariate analysis indicated a positive association between seroconversion to BTV and age, and an association with breed of cattle after controlling for clustering of animals within herds. Based on this model, cattle were more likely to become seropositive as they aged. Crossbred cattle were more likely to be seropositive than those of exotic breeds (odds ratio [OR] = 4.6; 95% CI: 1.5-14.1). The results indicate widespread exposure of dairy cattle to BTV in Nepal. The authors suggest that dairy cattle should be included in the surveillance plan for BTV infection in Nepal and that it is important to educate farmers about the possible impacts of this disease.

show abstract

Section: Discussioncontrasting

confidence: 57%

“…China, many decades ago. India first reported BT in 1964 in sheep (9), and infection with BTV has subsequently been detected in sheep, goats, cattle and buffaloes (10). Similarly, China first recognised the disease in 1979 (11) and antibodies to BTV have been detected in sheep, goats, cattle and buffaloes (11,12).…”

Section: Introductionmentioning

confidence: 99%

Serosurveillance and factors associated with the presence of antibodies against bluetongue virus in dairy cattle in two eco-zones of Nepal

Gaire¹,

Karki²,

Dhakal³

et al. 2016

Rev. Sci. Tech. OIE

View full text Add to dashboard Cite

show abstract

“…However, it contradicts the data presented by Joardar et al. () which showed a higher level of seropositivity in sheep (58.82%) than in goat (31.79%) in north‐eastern Indian state. Although small ruminants are equally susceptible to BTV infection, the clinical form of disease is more severe in sheep than goats.…”

Section: Discussioncontrasting

confidence: 82%

“…A prevalence of group‐specific anti‐VP7 antibodies in sheep (68.6%), goats (71.8%) and cattle (48.6%) was reported from Afghanistan (Ali, Dennison, Schauwers, Ziay, & Qanee, ). The seroconversion rates for anti‐VP7 antibodies in sheep (58.82%), goats (66.95%) and cattle (70.0%) were reported from India (Joardar, Barkataki, Halder, Lodh, & Sarma, ; Panda, Anjan, & Joardar, ). Seroprevalence of BTV in goats was found to be 67.7% in Iran (Mozaffari, Khalili, & Sabahi, ), while a prevalence of 20.3% and 13.3% in sheep and yaks was reported from the Tibetan Plateau of China, respectively (Ma et al., ).…”

Section: Introductionmentioning

confidence: 99%

Seroprevalence of Bluetongue Virus in small ruminants in Balochistan province, Pakistan

Sohail

Yaqub

Shafee

et al. 2018

Transbound Emerg Dis

View full text Add to dashboard Cite

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 (χ = 16.84, p = .01), parity (χ = 23.66, p = .00) and presence of vector (χ = 2.63, p = .10), whereas for sheep, it was associated with breed type (χ = 13.80, p = .01) and parity (χ = 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.

show abstract

“…BTV seropositive animals have been observed from bordering Indian states. For example, 57.6% in sheep in West Bengal [ 16 ], 58.8% in sheep in Assam [ 17 ] and 54.5% in goats and 13.5% in sheep in Uttar Pradesh [ 18 ] were seropositive to BTV indicating widespread exposure to BTV in this area. Nepal shares open borders with India and livestock movement between two countries is very frequent without formal quarantine process, though there is some formal trade through official quarantine routes.…”

Section: Discussionmentioning

confidence: 99%

Cross-sectional serosurvey and associated factors of bluetongue virus antibodies presence in small ruminants of Nepal

et al. 2014

View full text Add to dashboard Cite

BackgroundBluetongue (BT) is an infectious, insect-borne viral disease primarily affecting sheep and occasionally cattle and goats. In Nepal, BT is an emerging disease of economic importance. The objective of this study was to estimate the seroprevalence of BT virus (BTV) in small ruminants of two eco-zones of Nepal, Hills and Terai, and to identify the factors associated with virus exposure. We conducted a cross-sectional serosurvey from March 2012 through February 2013 by sampling 318 small ruminants (184 sheep and 134 goats) from seven clusters (villages) of selected vulnerable communities of Chitwan (Terai) and Lamjung (Hills) Districts of Nepal.ResultsOf the 318 serum sample tested, 27.9% [95% confidence interval (CI): 23.1- 33.2] were positive for BTV antibodies (25.0% sheep and 31.3% goats). Bivariate analysis indicated a positive association between seroconversion to BTV and flock size, eco-zone, breed, and contact history with cattle. Additionally, in female sheep and goats, a history of abortion was positively associated with seropositivity to BTV. However, the final multivariable model, after controlling for clustering of animals within the villages, identified only history of abortion and breed as the factors significantly associated with BT seropositivity in female sheep and goats. Based on this model, female small ruminants having a history of abortion were more likely to be seropositive compared to those without such history [Odds Ratio (OR) = 46.14 (95% CI: 11.66- 182.5)]. Exotic breeds were more likely to be seropositive compared to indigenous breeds [OR = 9.04 (95% CI: 3.08- 24.46)] while the risk for BTV seropositivity was not significantly different between indigenous and cross breeds.ConclusionsOur results showed that nearly a quarter of small ruminants in two regions of Nepal were seropositive for BTV, indicating wide exposure of small ruminants to this pathogen. We identified history of abortion and breed as factors significantly associated with the seropositivity of BTV. We recommend that surveillance for BTV infection in Nepal be strengthened and that it would be valuable to enhance the education of farmers about the possible impacts of this disease.

show abstract

Seroprevalence of bluetongue in north eastern Indian state- Assam

Cited by 23 publications

References 1 publication

Serosurveillance and factors associated with the presence of antibodies against bluetongue virus in dairy cattle in two eco-zones of Nepal

Serosurveillance and factors associated with the presence of antibodies against bluetongue virus in dairy cattle in two eco-zones of Nepal

Seroprevalence of Bluetongue Virus in small ruminants in Balochistan province, Pakistan

Cross-sectional serosurvey and associated factors of bluetongue virus antibodies presence in small ruminants of Nepal

Contact Info

Product

Resources

About