Pathogenicity for Chickens of a Reovirus Isolated from Turkeys

Heide, L. van der; Kalbac, M.; Brustolon, Maryanne; Lawson, Mark

doi:10.2307/1589973

Cited by 23 publications

(9 citation statements)

References 6 publications

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“…바이 러스성 관절염 또한 ARV와 관련되어 종계에 경제적으로 큰 피해를 주며 (Hemzani et al, 1996: Jones et al, 1994, 산란계 (Jones and Onunkwo, 1978;Schwartz et al, 1976)와 칠면조(Al Afaleq and Jones, 1989;Page et al, 1982) 에서도 감염이 확인된 바 있다. 또한, 칠면조에서 분리된 ARV 를 1일령 병아리에 감염시켰을 때 관절염 증상이 나타났다 는 보고도 있다( Van der Heide et al, 1980). 바이러스성 관절 염의 경우 비복건(gastrocnemius tendon) 파열의 병리학적 소 견을 보이며, 보행 곤란, 관절 종대 등의 임상 증상이 나타난 다 (Johnson and Van der Heide, 1971;Jones et al, 1975).…”

Section: 닭에서 Arv 감염 시 나타나는 임상 증상으로는 관절염 (Viral Arthritis) 흡수불량증후군(Maunclassified

Epidemiological Studies of Avian Reovirus Infection in Broilers in Korea

Kim

Kim²,

Song³

et al. 2008

Korean Journal of Poultry Science

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Avian reovirus (ARV) is a causative agent of viral arthritis/tenosynovitis, and malabsorption syndrome in broiler. The characteristics of malabsorption syndrome caused by ARV are diarrhea, poor feed conversion and stunting. Therefore, ARV infection has been recognized as one of the most important disease in the poultry industry because of economical losses. However, few study of ARV infection in broiler industry has been conducted in Korea. To evaluate the presence of ARV infection in broiler farms, epidemiological survey such as serological test and virus isolation has been conducted. For the serological survey using ELISA method, we selected five broiler farms which were located at different area and had a history of growth retardation, lameness, diarrhea and poor feathering. From these farms serum samples were collected at 1 day, 14 days and market age. All these farms had no history of vaccination against ARV. In addition to serological survey, we tried to isolate ARV from birds of designated farms at market age and collected feces and tissue samples such as cecal tonsil, intestine and liver. We were identified ARV by RT-PCR and transmissible electron microscopy. The samples were inoculated into 9-day-old embryonated eggs via the chorioallantoic membrane to observe the pock formation. For the pathogenicity test of ARV isolates, we inoculated with the isolates to the right footpad of 3-week-old SPF chicks and observed clinical signs and pathological changes for 14 days after challenge.Most broilers sampled for serological survey have maternal antibodies which were widely distributed at 1 day and decreased by 14 days. However, at the market age several broiler farms showed fairly high antibody titer against ARV. This increase of antibody titer at market age means the possible infection of ARV during the grow-out period. Among total 15 samples for the isolation of ARV. 2 samples were positive by RT-PCR and finally identified as a ARV. We inoculated these isolates in the SPF birds and observed that the antibody titer was increased from 7 days after challenge. However, we did not find any clinical signs both control and challenge groups.Based on the above results, it is clear that the ARV infection has been circulated in the broiler industry and caused significant economic losses. Further study is needed to evaluate the virulence of the isolates in the digestive system of broiler and the molecular characteristics of isolates.(Key words : avian reovirus, broiler, maternal antibody, ELISA, RT-PCR) † To whom correspondence should be addressed : moip@cbu.ac.kr

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Section: 닭에서 Arv 감염 시 나타나는 임상 증상으로는 관절염 (Viral Arthritis) 흡수불량증후군(Maunclassified

Epidemiological Studies of Avian Reovirus Infection in Broilers in Korea

Kim

Kim²,

Song³

et al. 2008

Korean Journal of Poultry Science

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“…Most studies of the infectious agents associated with tenosynovitis have considered either viral agents (van der Heide, 1977;Olson and Solomon, 1968;Jones etal, 1981) or bacterial agents (van Walsum, 1975) as having a principal aetiological role in the disease. However, the probable dual role of viruses and bacteria was suggested by MacKenzie and Bains (1976).…”

Section: Mycoplasma Serologymentioning

confidence: 99%

“…Alternatively, the isolations of reovirus may only represent the chance isolation of viraemic virus with no relationship to the disease, as'was suggested by Jones et al (1981) for adenoviruses. However, in view of the evidence that reoviruses are able to produce experimental tenosynovitis (Olson and Weiss, 1972;Glass etal, 1973;van der Heide, 1977) it is considered that this is unlikely. The low isolation rate of reovirus would be expected if infection occurred in susceptible chickens soon after hatching, resulting in a subclinical tenosynovitis, and a progressive decline in the level of infectious virus with age or development of active immunity.…”

Section: Mycoplasma Serologymentioning

confidence: 99%

“…The condition has also been reported in layer breeds (Schwartz et al, 1976). It is generally accepted that tenosynovitis is associated with avian reovirus infection (Olson and Weiss, 1972;Glass et al, 1973;van der Heide, 1977). Adenoviruses have also been isolated from lesions in affected birds (MacKenzie and Bains, 1976;Jones et al, 1981) although their role in the disease is unknown (Jones et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

“…Tenosynovitis/viral arthritis, a major cause of leg weakness in meat type chickens, has been reported to occur in several countries (Olson and Kerr, 1966;Carboni et al, 1975;Jones et al, 1975;MacKenzie and Bains, 1976;Itakura et al, 1977;van der Heide, 1977;Ide and Dewitt, 1979;Levisohn and Weismann, 1980). The condition has also been reported in layer breeds (Schwartz et al, 1976).…”

Section: Introductionmentioning

confidence: 99%

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Bacterial and viral agents associated with tenosynovitis in broiler breeders in Western Australia

1982

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SUMMARYThe pathology and infectious agents associated with several outbreaks of clinical tenosynovitis in poultry were investigated. Staphylococcus aureus were recovered from tendon tissue of from 51.9% to 97.8% of affected chickens in different outbreaks of the disease. 5. aureus were also present in the liver and heart blood and were considered to contribute to the high mortality observed following occurrence of clinical tenosynovitis in individual chickens. Bacteria otherthan S. aureus were also recovered but in a much lower proportion of chickens than was S. aureus. Adenoviruses and reoviruses were also recovered from tendon tissue of chickens with a concurrent bacterial infection. Although the pathology observed in clinically affected chickens was suggestive of a bacterial aetiology it is hypothesised that the tenosynovitis outbreaks investigated were due to an early viral infection which normally remained subclinical and that secondary infection with bacteria, particularly S. aureus, was responsible for the development of clinical signs.

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Reovirus Infections

Jones¹

2013

Diseases of Poultry

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Pathogenicity for Chickens of a Reovirus Isolated from Turkeys

Cited by 23 publications

References 6 publications

Epidemiological Studies of Avian Reovirus Infection in Broilers in Korea

Epidemiological Studies of Avian Reovirus Infection in Broilers in Korea

Bacterial and viral agents associated with tenosynovitis in broiler breeders in Western Australia

Reovirus Infections

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