Large-scale seroprevalence and risk factors associated with Bluetongue virus in Iran

Bakhshesh, Mehran; Otarod, Vahid; Mehrabadi, Mohammad Hossein Fallah

doi:10.1016/j.prevetmed.2020.104994

Cited by 12 publications

(4 citation statements)

References 29 publications

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“…However, the BTV was more active in sheep aged 1 year or less and those more than 3 years. These findings could confirm the continued suggest that young animals become susceptible to BTV infection after 6 months of age, and this may be secondary to the disappearance of protective maternal antibodies 57 . The active circulation of BTV in sheep above 3 years of age strongly confirms recent BTV reinfection.…”

Section: Discussionsupporting

confidence: 76%

“…These findings could confirm the continued infection in Morocco caused by recurrent exposure of older animals to infected Culicoides . The RT-qPCR results suggest that young animals become susceptible to BTV infection after 6 months of age, and this may be secondary to the disappearance of protective maternal antibodies 57 . The active circulation of BTV in sheep above 3 years of age strongly confirms recent BTV reinfection.…”

Section: Discussionmentioning

confidence: 95%

“…Likewise, they are generally physiologically active during mating and lactation and are likely to be more vulnerable to BTV infection. The difference could also be due to the inherent susceptibility of females to BTV infection or the influence of other female-specific factors 57 . As it was previously observed for other diseases, females may have a greater number of immune genes and cells that promote a better immune response and high antibody production (quantity and quality) 60 .…”

Section: Discussionmentioning

confidence: 99%

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Serological and molecular prevalence study of bluetongue virus in small domestic ruminants in Morocco

Daif

Berbri

Lhor³

et al. 2022

Sci Rep

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Bluetongue is an arthropod-borne viral disease transmitted by Culicoides biting midges, affecting domestic and wild ruminants. The current study aims to assess the seroprevalence of the bluetongue virus (BTV) and confirm its active circulation among sheep and goats populations in Morocco, as well as study the risk factors associated with BTV infection. To this end, a total of 1651 samples were randomly collected from 1376 sheep and 275 goats in eight (out of 12) regions of the country between March 2018 and July 2021.These samples were primarily tested using competitive ELISA (c-ELISA). Subsequently, 65% of c-ELISA positives (n = 452) were analyzed by real-time reverse transcription-polymerase chain reaction (RT-qPCR). The results revealed an overall BTV seroprevalence in small ruminants in Morocco of 41.7%, including 42.6% in sheep and 37.5% in goats. The RT-qPCR results showed that the overall BTV viropositivity rate was 46.7%, including 48.1% in sheep and 41.8% in goats. These viro-serological rates varied significantly by age, sex, and breed of the tested animals, husbandry method, season, and geographic origin. This indicates that these parameters constitute risk factors for BTV transmission routes in Morocco. The findings also indicate that goats play a role as reservoirs in maintaining the BTV in Morocco. It appears from this study that bluetongue is endemic in Morocco. The environmental and climate conditions as well as the husbandry methods adopted in the country are particularly favorable for the virus transmission throughout the country.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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Serological and molecular prevalence study of bluetongue virus in small domestic ruminants in Morocco

Daif

Berbri

Lhor³

et al. 2022

Sci Rep

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“…Bluetongue caused by the bluetongue virus (BTV) is an arboviral non-contagious disease of domestic and wild ruminants and is designated as a reportable disease by the World Organization for Animal Health (OIE) (1). BTV is a segmented doublestranded (dsRNA) virus belonging to the genus Orbivirus of the family Reoviridae and transmitted through biting by hematophagous midges of Culicoides (2).…”

Section: Introductionmentioning

confidence: 99%

Seroprevalence and Risk Factors of the Bluetongue Virus in Cattle in China From 1988 to 2019: A Comprehensive Literature Review and Meta-Analysis

Gong

Yang

et al. 2021

Front. Vet. Sci.

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Background: Bluetongue caused by the bluetongue virus (BTV) is a non-contagious and an insect-borne disease mainly affecting domestic and wild ruminants. Bluetongue in cattle is associated with vesicular lesions, weight loss, low milk production, and low reproductive capacity. It should not be ignored as it is associated with large economic losses to the livestock breeding industry in China. Although many studies have investigated bluetongue virus infection in cattle, no nationwide study on the prevalence of bluetongue virus infection in cattle from China has yet been conducted. This meta-analysis aimed to evaluate the seroprevalence and risk factors for bluetongue in cattle.Results: We collected 50 publications from 1988 to 2019 through PubMed, ScienceDirect, Chinese Web of Knowledge (CNKI), VIP Chinese journal database, and Wanfang database. A total of the pooled bluetongue seroprevalence of 12.2% (5,332/87,472) in cattle was tested. The point estimate of bluetongue collected from 2001 to 2011 was 22.5% (95% CI: 1.2–58.9), which was higher than after 2012 (9.9%, 95% CI: 3.3–19.4). The analysis of the feeding model subgroup revealed that the seroprevalence of bluetongue was significantly higher (P < 0.05) among free-range cattle (22.5%; 95% CI: 7.7–42.3) than among cattle from intensive farming systems (1.8%; 95% CI: 0.0–6.7). The seroprevalence of bluetongue in different species showed significant variation (P < 0.05), with the highest seroprevalence of 39.8% (95% CI: 18.7–63.0) in buffalo and the lowest seroprevalence of 4.3% (95% CI: 1.2–9.0) in yak. In the zoogeographical division subgroup, the seroprevalence of bluetongue correlated positively within a certain range with the species distribution of Culicoides.Conclusion: Our findings suggested that bluetongue was prevalent in cattle in China. In addition, the contact with sheep, other ruminants, or transmission media such as Culicoides may increase the seroprevalence of bluetongue disease in cattle. It is necessary to carry out continuous monitoring of the bluetongue seroprevalence. Moreover, comprehensive and improved strategies and measures should be implemented to prevent and control the spread of bluetongue.

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Bluetongue virus seroprevalence and risk factor analysis in cattle and water buffalo in southern Italy (Campania region)

Ferrara,

Improda,

Piscopo

et al. 2023

Vet Res Commun

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Bluetongue is an arthropod-borne viral infection that is notifiable in several countries and causes significant economic losses and major concerns for ruminant trade. In this study, we investigated bluetongue 1seroprevalence in the Campania region, southern Italy, in cattle and buffalo populations, and assessed which factors were correlated with a high risk of exposure. The infection was widespread, as evidenced by the high individual (43.6%) and herd prevalence (85.4%). The highest prevalence was found in adult animals. Among the climatic factors analyzed, average temperature played a prominent role, being capable of affecting the probability of being positive for this infection. Surprisingly, exposure to Schmallenberg virus did not predispose animals to be positive for bluetongue virus, even though these infections share the same vector (Culicoides). Our data, consistent with those in the literature, suggest the transversal spread of bluetongue virus in the Mediterranean area, and indicate a limited co-exposure rate between Bluetongue and Schmallenberg viruses.

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Large-scale seroprevalence and risk factors associated with Bluetongue virus in Iran

Cited by 12 publications

References 29 publications

Serological and molecular prevalence study of bluetongue virus in small domestic ruminants in Morocco

Serological and molecular prevalence study of bluetongue virus in small domestic ruminants in Morocco

Seroprevalence and Risk Factors of the Bluetongue Virus in Cattle in China From 1988 to 2019: A Comprehensive Literature Review and Meta-Analysis

Bluetongue virus seroprevalence and risk factor analysis in cattle and water buffalo in southern Italy (Campania region)

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