Subclinical pneumonia in lambs

Thurley, D.C.; Boyes, Betty W.; Davies, D.H.; Wilkins, M.; O'Connell, E.; Humphreys, Stewart R.

doi:10.1080/00480169.1977.34396

Cited by 22 publications

(6 citation statements)

References 9 publications

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“…During a study of enzootic pneumonia in lambs in New Zealand several virus isolations were made (9,18). Two of these were identified as adenoviruses on the basis of morphology, physieochemical characteristics, and possession of the adenovirus group antigen (9).…”

Section: Discussionmentioning

confidence: 99%

“…The two OAV strains WV419/75, and WV757/75 isolated from lambs in New Zealand (18) were kindly received from Dr. D. H. Davies, Wallaceviile Animal Research Centre, New Zealand. The viruses were purified by terminal dilution, following their isolation (9).…”

Section: Virusesmentioning

confidence: 99%

“…Two adenoviruses, isolated from lambs in New Zealand (18) were shown to be distinct from each other in cross neutralisation tests but were not compared with other mammalian or sheep adenoviruses (9). B.M.…”

Section: Introductionmentioning

confidence: 98%

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A sixth species of ovine adenovirus isolated from lambs in New Zealand

Adair¹,

McFerran²,

McKillop³

1982

Archives of Virology

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Two adenoviruses (WV419/75 and WV757/75), isolated from lambs in New Zealand were compared using neutralisation tests with the five recognised ovine adenovirus species, NINE bovine and four porcine adenoviruses. WV419/75 did not cross-react with any of the viruses tested and represents a new ovine adenovirus species (OAV-6). WV757/75 cross-reacted with bovine adenovirus type 7 (BAV-7) with a homologous to heterologous titre ratio of 16 in one direction only, and also showed a substantial one-way cross reaction in haemagglutination-inhibition tests (WV757 antiserum inhibiting haemagglutination by BAV-7). There was therefore insufficient distinction from BAV-7 virus to allow designation as a separate species. Fluorescent antibody studies with WV419 and WV757 demonstrated virus inclusions in the nuclei of infected cells. These were stained by antiserum to OAV-4 indicating presence of the mammalian group antigen. Thin section electron microscope studies showed typical adenovirus particles and associated inclusions in cell nuclei. The similarity of the two viruses to the bovine subgroup 2 adenoviruses in several of their properties is discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Virusesmentioning

confidence: 99%

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A sixth species of ovine adenovirus isolated from lambs in New Zealand

Adair¹,

McFerran²,

McKillop³

1982

Archives of Virology

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“…Rarely, however, is natural infection uncomplicated. A frequently asso ciated pathogen is Pasteurella haemolytica (Thurley et al, 1977). Dual infec tion with M. ovipneumoniae and Pasteurella haemolytica of biotype A has been shown experimentally to produce « proliferative-exudative » lung chan ges (Gilmour et al, 1979), indistinguishable from the « atypical pneumonia » described by Stamp and Nisbet (1963).…”

Section: Pathologymentioning

confidence: 99%

Respiratory diseases induced in small ruminants by viruses and mycoplasma

Martin¹

1983

Rev. Sci. Tech. OIE

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In this paper the primary virus and mycoplasma invaders of the respiratory tract of sheep and goats are considered, including those which do not produce clinically apparent disease. Among acute viral infections, the widespread occurrence of parain fluenza 3 virus and the established findings that it allows other more sinister organisms to invade the lower respiratory tract would indicate that it is a virus of considerable economic importance. Little is known about the significance of infections caused by adenoviruses and reoviruses. Peste des petits ruminants (PPR), caused by a rinderpest-like virus, is of considerable economic importance in West Africa. The her pesvirus of infectious bovine rhinotracheitis (IBR) is capable of infect ing goats and sheep. Infections caused by pox viruses and the border disease virus are not primarily respiratory diseases. Sheep pulmonary adenomatosis, maedi-visna and retrovirus infec tion in goats are the main virus infections associated with progressive pneumonias of small ruminants. At present six identified species of mycoplasma have been recovered from the respiratory tract of sheep and goats, not all of which have been associated with disease. M. ovipneumoniae is considered to be res ponsible for chronic respiratory infection which progresses slowly; Pasteurella haemolytica is a frequently associated pathogen. Contagious caprine pleuropneumonia (CCPP) is a serious and economically impor tant disease, affecting exclusively goats. Three mycoplasmas have been considered as its aetiological agent : M. mycoides subsp. capri, M. mycoides subsp. mycoides, and the unclassified strain F 38.

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“…Conserved regions in NP protein probably reflect a common protein function in each of these paramyxoviruses. For example, Deshpande and Portner, (1985) (Alley, 1975;Alley et al, 1975;Thurley et al, 1977;Davies, 1980). Among these, parainfluenza type 3 virus is considered an important factor in the initiation of infection (Alley and Clarke, 1977).…”

Section: Extensive Antigenic Relationships Between Bpi-3 and Hpi-3 VImentioning

confidence: 99%

Recognition of paramyxovirus antigens by lambs

Hussain

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Subclinical pneumonia in lambs

Cited by 22 publications

References 9 publications

A sixth species of ovine adenovirus isolated from lambs in New Zealand

A sixth species of ovine adenovirus isolated from lambs in New Zealand

Respiratory diseases induced in small ruminants by viruses and mycoplasma

Recognition of paramyxovirus antigens by lambs

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