Effect of maedi‐visna virus infection on milk production in dairy sheep in Greece

Ploumi, K.; Vainas, E.; Lymberopoulos, A. G.; Paschaleri, E.; Christodoulou, V.; Giouzeljiannis, A.; Xioufis, A.; Dewi, I. Ap

doi:10.1136/vr.149.17.526

Cited by 22 publications

(20 citation statements)

References 6 publications

(8 reference statements)

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“…With regard to MV, prevalence was similar to other regions in Brazil (Lombardi et al 2009). Although SRLVs represent a concern in small ruminant exploration (Synge and Ritchie 2010), particularly in developing countries (Ploumi et al 2001;Yilmaz et al 2002), a minor effect on flock performance parameters has been described (Leitner et al 2010). The observed reduction in seroreactivity is an interesting finding and demonstrates that control programs may rapidly reduce its occurrence in affected areas.…”

Section: Discussionmentioning

confidence: 86%

Leptospirosis as the most frequent infectious disease impairing productivity in small ruminants in Rio de Janeiro, Brazil

Martins

Penna

Hamond

et al. 2011

Trop Anim Health Prod

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Despite the importance of small ruminants breeding in developing countries, milk/meat productivity remains unsatisfactory. Infectious diseases, such as leptospirosis, brucellosis, and small ruminant lentiviruses (SRLVs), contribute to this scenario. The objective of the present study was to determine the role of each of these diseases in the productivity of small ruminants breeding in Rio de Janeiro, Brazil. In goats, 343 samples were tested for leptospirosis, 560 for Brucella abortus, and 506 for caprine arthritis-encephalitis (CAE), whereas in sheep, 308 samples were tested for leptospirosis, 319 for B. abortus, 374 for Brucella ovis, and 278 for Maedi-Visna (MV). Regarding leptospirosis, 25.9% of goats and 47.4% sheep were seroreactive, with serovar Hardjo the most prevalent in both species. Anti-B. abortus agglutinins were found in 0.7% of all samples, exclusively in goats. In relation to SRLVs, 8.6% of goats and 3.2% of sheep samples were positive for CAE and MV, respectively. Leptospirosis was the major infectious problem in the small ruminants sampled and may contribute to impaired productivity of these animals.

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Section: Discussionmentioning

confidence: 86%

Leptospirosis as the most frequent infectious disease impairing productivity in small ruminants in Rio de Janeiro, Brazil

Martins

Penna

Hamond

et al. 2011

Trop Anim Health Prod

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“…Unfortunately, serological methods aren't able to detect infected animals prior to seroconversion, and the result of the tests cannot be interpreted during the first 6 months of life because of passively acquired antibodies in non-infected offspring [16]. Presence of SRLV antibodies in ovine milk was detected by Ploumi et al [17], which indicated that MVV-seropositive sheep flocks are commonly associated with mastitis incidence. To our knowledge there is no study regarding the correlation between ovine mastitis and SRLV using molecular techniques in Iran.…”

Section: Discussionmentioning

confidence: 99%

Study on Correlation of Maedi-Visna Virus (MVV) with Ovine Subclinical Mastitis in Iran

et al. 2013

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Maedi-Visna is an important slow viral disease of sheep leading to progressive pneumonia, encephalitis and mastitis. Udder is one of the organs affected by MVV. Despite the fact that in Iran Maedi-Visna is known since 2000, to the authors' knowledge correlation of subclinical mastitis and infection with MVV has not been assayed. In this study 50 milk samples from 10 flocks in East Azerbaijan Province of Iran were tested. None of the animals exhibited any clinical signs of the disease. Forty samples were collected from CMT positive ewes and ten were taken from CMT negative ewes. Milk samples were analyzed using PCR targeting gag sequence. Presence of provirus DNA was detected in one sample from CMT negative and seven samples from CMT positive ewes. These data demonstrate that 16.5 % of sheep with subclinical mastitis were infected to MVV. Thus this virus can be considered one of the main pathogenic agents of mastitis and can be dramatically transmitted to lambs by milk.

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“…has a well-documented adverse effect in milk production (Snowder et al, 1990;Ploumi et al, 2001;Gelasakis et al, 2015). A survey performed in the United Kingdom has estimated that losses associated with Small Ruminant Lentivirus infections could be as high as 40% (Ritchie and Hosie, 2010).…”

Section: Significance In Adult Animalsmentioning

confidence: 99%

Significance of respiratory diseases in the health management of sheep

Lacasta

González

Navarro

et al. 2019

Small Ruminant Research

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 Respiratory diseases of sheep produce a relevant economic impact in ovine industry.  In lambs, the principal adverse effects are related to mortality and poor quality of lambs produced.  In adults, financial losses are related to reduced production of affected sheep, need for early culling and death.  These are multi-faceted diseases and prevention is based on management practices.  Appropriate health measures that improve animal immune response also will help control of the diseases.

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Effect of maedi‐visna virus infection on milk production in dairy sheep in Greece

Abstract: BATSON, 0. V. (I1940) The function of the vertebral veins and their role in the spread of metastases.

Cited by 22 publications

References 6 publications

Leptospirosis as the most frequent infectious disease impairing productivity in small ruminants in Rio de Janeiro, Brazil

Leptospirosis as the most frequent infectious disease impairing productivity in small ruminants in Rio de Janeiro, Brazil

Study on Correlation of Maedi-Visna Virus (MVV) with Ovine Subclinical Mastitis in Iran

Significance of respiratory diseases in the health management of sheep

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