The Prevalence and Distribution of Leptospiral Titres in Cattle and Pigs in Queensland

Elder, Jean K.; Ward, W.H.

doi:10.1111/j.1751-0813.1978.tb02464.x

Cited by 14 publications

(10 citation statements)

References 10 publications

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“…Leptospira species has previously been detected in feral pigs caught on piggeries in Queensland at a prevalence of 31 per cent (Elder and Ward 1978). During the time of the Elder and Ward (1978) study, 1972–1976, piggeries were more of a sideline enterprise, and were generally free-range in style, so would have been more accessible to feral pigs than they are now (Richardson and O'Connor 1978).…”

Section: Discussionmentioning

confidence: 99%

“…During the time of the Elder and Ward (1978) study, 1972–1976, piggeries were more of a sideline enterprise, and were generally free-range in style, so would have been more accessible to feral pigs than they are now (Richardson and O'Connor 1978). The prevalence of Leptospira species in feral pigs has increased since the time of the Elder and Ward (1978) study, despite the incorporation of a vaccination routine on piggeries for L interrogans serotype Pomona. This indicates that feral pigs are a stand-alone reservoir of Leptospira species infection, and pose a source of infection for domestic pigs in the absence of protective vaccinations.…”

Section: Discussionmentioning

confidence: 99%

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Pathogen presence in feral pigs and their movement around two commercial piggeries in Queensland, Australia

et al. 2014

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Feral pigs are wild animal reservoirs of infectious pathogens transmissible to other species, all of which are transmissible to domestic pigs. The objective of this study was to detect the presence of harmful production-limiting pathogens; Brucella suis, Leptospira species, Lawsonia intracellularis, Mycoplasma hyopneumoniae and Actinobacillus pleuropneumoniae in a feral pig population within a 10 km radius of two large-scale commercial piggeries in Southern Queensland, Australia. The movement pattern of six pigs within the feral population was also investigated using geographic positioning system collars. All pathogens were present in the feral pig population except for A pleuropneumoniae. The true seroprevalence (TP) from 83 serum samples was 10.5 per cent for B suis, 48.6 per cent for Leptospira species, 100 per cent for L intracellularis and 42.1 per cent for M hyopneumoniae. Of 72 lung samples, 27.6 per cent were positive for M hyopneumoniae. Serum samples from 86 domestic sows within the study region were positive for Leptospira species (TP 2.1 per cent), L intracellularis (TP 100 per cent) and M hyopneumoniae (TP 100 per cent). The majority of feral pig movement was within 5 km of the piggeries, with one approaching to 100 m of the free-range piggery. The presence of pathogens in feral pigs in such close proximity to commercial piggeries could pose a biosecurity risk.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Pathogen presence in feral pigs and their movement around two commercial piggeries in Queensland, Australia

et al. 2014

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“…The different geographical distribution of L . pomona and L. h a r d j o prevalences (Elder and Ward 1978) and beef and dairy cattle populations (Anon 1983) may also have influenced the observed differences.…”

Section: Type O F Stock Differencesmentioning

confidence: 96%

“…Therefore, the routine diagnosis of leptospiral abortion largely depends on serological examination of the herd. Interpretation of serological tests is made difficult by a high prevalence of infection in cattle (Elder and Ward 1978), by the persistence of leptospiral titres in cattle for years following infection and by the common practice of bleeding cattle only once, at variable times, after abortion has occurred.…”

Section: Introductionmentioning

confidence: 99%

The significance of leptospiral titres associated with bovine abortion

et al. 1985

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To investigate relationships between serological titres to 2 serovars, pomona (L. pomona) and hardjo (L. hardjo), of Leptospira interrogans and abortions, log linear and logit models were fitted to herd and individual cow data from cattle serologically negative for brucellosis. Serological titres to both serovars were significantly related to abortions in individual cows, with L. pomona having a stronger relationship than L. hardjo. L. hardjo was not significant when herd data were analysed. Differences between dairy and beef cattle in the serological titres found to both L. pomona and L. hardjo were detected when data sets of all cattle or cattle with no history of abortion were analysed. The beef/dairy differences may be due to different management practices and/or to different geographical distributions of both serovars and populations of beef and dairy cattle. If there are no cattle in a herd with a reciprocal titre of 3000 or greater for L. pomona, it is unlikely that L. pomona is associated with the abortion problem. There was no specific L. hardjo titre which separated high and low probabilities that the serum came from a cow or herd with an abortion history.

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“…A survey of 1485 beef herds in Queensland showed that Leptospira inferrogans serovar hardjo (hereinafter referred to as L. hardjo) antibodies were present in 62% of herds (Elder and Ward 1978). O n Swan's Lagoon Cattle Field Research Station, L .…”

Section: Introductionmentioning

confidence: 99%

LEPTOSPIRA INTERROGANS SEROVAR HARDJO VACCINATION OF PREGNANT BEEF COWS AND SUBSEQUENT GROWTH RATE OF PROGENY

Holroyd¹

1980

Aust Veterinary J

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Five experiments with Leptospira interrogans serovar hardjo vaccine were carried out over a 6-year period in pregnant Brahman-cross and Sahiwal-cross cows in the dry tropics on northern Queensland. The numbers ranged from 127 breeders aged 2 to 5 years in 1972 to 344 breeders aged 2 to 9 years in 1977. Half of the cows were vaccinated twice in mid-pregnancy except for 1977, when they were vaccinated once. In 1975-1977 inclusive, half of the heifers were given an additional dose of vaccine at commencement of mating. Vaccination caused a significant (P less than 0.01) reduction of prenatal loss but not of perinatal or postnatal losses. Growth rates of calves from vaccinated and unvaccinated dams were similar.

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The Prevalence and Distribution of Leptospiral Titres in Cattle and Pigs in Queensland

Cited by 14 publications

References 10 publications

Pathogen presence in feral pigs and their movement around two commercial piggeries in Queensland, Australia

Pathogen presence in feral pigs and their movement around two commercial piggeries in Queensland, Australia

The significance of leptospiral titres associated with bovine abortion

LEPTOSPIRA INTERROGANS SEROVAR HARDJO VACCINATION OF PREGNANT BEEF COWS AND SUBSEQUENT GROWTH RATE OF PROGENY

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