Mycoplasmas and cuffing pneumonia in a group of calves

Pirie, H. M.; Allan, E.M.

doi:10.1136/vr.97.18.345

Cited by 26 publications

(8 citation statements)

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“…Failure to isolate Ureaplasmas from the mucosa of the respiratory tract of the control calves confirms the findings of several authors (20,22,24) that it is not possible to isolate Ureaplasma organisms from non-inflammatory lung tissue. This finding seems to be also one of the convincing proofs for the pathogenicity of Ureaplasmas for calves.…”

Section: Discussionsupporting

confidence: 85%

Differences in the pathogenicity for calves of Ureaplasma strains depending on the site of their isolation*

Truszczyński

Pilaszek

1984

Zentralblatt für Veterinärmedizin Reihe B

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Summary The study aimed to determine the pathogenic properties for calves of Ureaplasma strains, taking into account the site of their isolation. One strain was isolated from the lung and another from the nasal mucosa of two different pneumonic calves. The third strain originated from the semen of a healthy bull. As the result of the experimental infection of conventionally raised calves of about 6 weeks of age differences in the pathogenicity of the 3 Ureaplasma strains were demonstrated. The most pathogenic was the strain isolated from pathologically changed lung tissue, next the strain isolated from the nasal mucosa. The least pathogenic was the strain isolated from the semen. The nasal mucosa offered usually the same possibility to reisolate Ureaplasmas from the infected calves as tracheal, bronchial and pulmonary tissues. The metabolic inhibition test (MIT) enabled the detection of Ureaplasma antibodies in infected animals. The highest titres were observed in animals infected with the strain isolated from the lung and the lowest in calves infected with the strain from bull semen. The three investigated strains were not related antigenically in the MIT. No anti‐Ureaplasma antibodies were detected in non‐infected calves. This indicates the value of the MIT in the detection of infected animals. The participation of Ureaplasmas in the aetiology of enzootic pneumonia of calves was confirmed. Zusammenfassung In Abhängigkeit ihrer Isolationsorte bestehende Pathogenitätsunterschiede von Ureaplasmastämmen bei Kälbern Die Arbeit beabsichtigte die pathogenen Eigenschaften von Ureaplasmastämmen unter Berücksichtigung ihrer Isolationsorte für Kälber zu bestimmen. Ein Stamm wurde aus der Lunge, ein weiterer aus der nasalen Mukosa zweier verschiedener, an Pneumonie erkrankter Kàlber isoliert. Der dritte Stamm wurde aus dem Samen eines gesunden Bullen gewonnen. Als Ergebnis einer experimentellen Infektion konventionell aufgezogener, etwa sechs Wochen alter Kälber wurden Pathogenitätsunterschiede der drei Ureaplasmastämme festgestellt. Der aus dem pathologisch veränderten Lungengewebe isolierte Stamm erwies sich als am meisten pathogen, gefolgt von dem aus der nasalen Mukosa isolierten Stamm. Am wenigsten pathogen war der aus dem Samen isolierte Stamm. Für die Reisolation von Ureaplasmen aus den infizierten Kälbern bietet die nasale Mukosa gleiche Möglichkeiten wie Tracheal‐, Bronchial‐ und Lungengewebe. Der Metabolismus‐Hemmungs‐Test (MIT) ermöglicht den Nachweis von Ureaplasmaantikörpern in infizierten Tieren. Die höchsten Titer wurden bei den Tieren festgestellt, die mit dem aus der Lunge isolierten Stamm infiziert wurden und die niedrigsten bei den Kälbern, die mit dem aus dem Bullensamen isolierten Stamm infiziert wurden. Im MIT zeigten sich die drei untersuchten Stämme als nicht antigenverwandt. Bei nicht infizierten Kälbern konnten keine Anti‐Ureaplasmaantikörper nachgewiesen werden, was auf den Wert des MIT beim Nachweis infizierter Tiere hinweist. Die Beteiligung von Ureaplasmen an der Ätiologie der enzootischen Pne...

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Section: Discussionsupporting

confidence: 85%

Differences in the pathogenicity for calves of Ureaplasma strains depending on the site of their isolation*

Truszczyński

Pilaszek

1984

Zentralblatt für Veterinärmedizin Reihe B

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“…It was isolated from healthy animals as well as from animals with respiratory disease, as has also been observed by Pirie and Allan (1975). The potential pathogenicity of M bovirhinis is doubtful.…”

Section: Discussionmentioning

confidence: 71%

Isolation ofMycoplasmaspecies from the lower respiratory tract of healthy cattle and cattle with respiratory disease in Belgium

et al. 2002

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Between 1997 and 2000, a total of 150 healthy cattle and 238 animals with respiratory disease were examined for six Mycoplasma species. Attempts were made to detect Mycoplasma canis, Mycoplasma dispar and Ureaplasma diversum in calves with recurrent disease, and all three of these species were identified in calves with recurrent disease and in healthy lungs. In healthy calves, 84 per cent of bronchoalveolar lavage fluids were mycoplasma free; when cultures were positive, Mycoplasma bovirhinis was the only species isolated. Mycoplasmas were isolated from 78 per cent of animals suffering recurrent respiratory disease and from 65 per cent of acute respiratory cases. Mycoplasma bovis was isolated from bronchoalveolar lavages from 35 per cent of calves suffering recurrent respiratory disease, and from 50 per cent of acute cases, and from 20 per cent of pneumonic cases examined postmortem. M bovis was associated with other Mycoplasma species in 44 per cent of cases. M dispar was also isolated from 45.5 per cent of calves suffering recurrent respiratory disease, often in association with M bovis. M canis was identified for the first time in diseased Belgian cattle. Other mycoplasmas, including Mycoplasma arginini, Mycoplasma alkalescens and U diversum, were isolated less frequently. Associations between mycoplasmas and other pathogens were often observed. Among lungs infected with Pasteurella and/or Mannheimia species, more than 50 per cent were mixed infections with M bovis.

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“…The publications were often a single report of the isolant, but pathogenicity and biological behavior have also been investigated in many instances (Carter, 1954a(Carter, , 1954bCarter and McSherry, 1955;Hamdy et al, 1958;Olson et al, 1960;Langer and Carmichael, 1963;Harbourne et al, 1965;Dawson et al, 1966;Davies, 1967;Ern0, 1967;Gourlay, 1968Gourlay, , 1969Ern0, 1969;Ern0 and Philipsen, 1969;Gourlay and Thomas, 1969;Hirth et al, 1970;Ide, 1970;Gourlay and Thomas, 1970;Ern#, 1971;Jurmanova and Krejci, 1971;Ern0 and Aalund, 1972;Thomas and Smith, 1972;Blom, 1972, 1973;Blom et al, 1973;Frey, 1973;Gourlay, 1973;Shimizu et al, 1973;St. George et al, 1973;Ernfi, 1975;Gourlay et al, 1975;Langford, 1975;Ose and Muenster, 1975;Mensik et al, 1975;Pi rie and Allan, 1975;Thomas et al, 1975;Shimizu et al, 1975;Allan et al, 1976;Brownlie et al, 1976;Gourlay et al, 1976a;Howard et al, 1976;…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental infection of calves with Mycoplasma dispar

Ribeiro

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Mycoplasmas and cuffing pneumonia in a group of calves

Cited by 26 publications

References 0 publications

Differences in the pathogenicity for calves of Ureaplasma strains depending on the site of their isolation*

Differences in the pathogenicity for calves of Ureaplasma strains depending on the site of their isolation*

Isolation ofMycoplasmaspecies from the lower respiratory tract of healthy cattle and cattle with respiratory disease in Belgium

Experimental infection of calves with Mycoplasma dispar

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