Serological and Cultural Studies of Chicken Breeding Flocks and Their Progeny for Mycoplasma

Hg, Carlson; Howell, Joseph M.

doi:10.2307/1588323

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…Mycoplasma gallisepticum is capable of colonizing the liver and reproductive organs of birds (Carlson and Howell, 1967;Sahu and Olson, 1976). Peebles et al (2007) showed that the period [pullet (12 wk) vs. hen (22 wk)] at which layers are inoculated (sham or FMG) can affect their reproductive organ characteristics and, more specifically, that the period at which an FMG inoculation is given can affect small intestinal structure.…”

Section: Resultsmentioning

confidence: 99%

Effects of time-specific F-strain Mycoplasma gallisepticum inoculation overlays on prelay ts-11-strain M. gallisepticum vaccination on digestive and reproductive organ characteristics of commercial egg-laying hens,

et al. 2009

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Two trials were conducted to determine the effects of a prelay ts-11-strain Mycoplasma gallisepticum (ts-11MG) vaccination alone or in conjunction with F-strain M. gallisepticum (FMG) inoculation overlays at 2 different age periods during lay on the digestive and reproductive organ characteristics of commercial egg-laying hens. In each trial, the following 4 treatments were utilized: sham vaccination at 10 wk of age, ts-11MG vaccination at 10 wk of age, ts-11MG at 10 wk of age overlaid by FMG inoculation at 22 wk of age, and ts-11MG at 10 wk of age overlaid by FMG at 45 wk of age. Necropsies were performed at the end of both trials (58 wk of age), using 2 birds from each of 4 replicate units per treatment, to observe treatment effects on the following parameters: liver weight, liver lipid and moisture concentrations, incidence of fatty liver hemorrhagic syndrome, ovary weight, number of mature ovarian follicles, and the total and segmental weights, lengths, and histologies of the oviduct and small intestine. Treatments affected only vaginal length as a percentage of total oviduct length. Vaginas were relatively longer in hens that had only been vaccinated with ts-11MG at 10 wk in comparison to all the other treatment groups, including controls. Except for relative vaginal length, the digestive and reproductive organs of layers were not influenced by the ts-11MG and FMG treatment regimens imposed in this study. These results confirm that when coupled with FMG inoculations during lay, prelay ts-11MG vaccinations may be a practical substitute for prelay FMG inoculations for providing continual protection against field-strain M. gallisepticum infections in layers.

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Section: Resultsmentioning

confidence: 99%

Effects of time-specific F-strain Mycoplasma gallisepticum inoculation overlays on prelay ts-11-strain M. gallisepticum vaccination on digestive and reproductive organ characteristics of commercial egg-laying hens,

et al. 2009

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“…Culture of MG from the periovarian region (Fabricant and Levine, 1963), oviduct (Carlson andHowell, 1967), liver, spleen, uterus, andvagina (Sahu andOlson, 1976) has also been reported. Sinus, tracheal, or air sac exudates have further been reported as sufficient for the isolation of MG (Yoder, 1978;.…”

Section: Introductionmentioning

confidence: 99%

Mycoplasma gallisepticum Isolation in Layers

1984

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Mycoplasma gallisepticum (MG) isolations in live chickens have been made from swabs obtained primarily from the trachea or nasal exudates. As tracheal swabs are often contaminated with feed and because tracheal swabbing may be stressful to the bird, this study was conducted to determine if swabs from the choanal cleft (palatine fissure) would yield MG isolation rates comparable to MG isolation rates of swabs taken from the trachea. Commercial Leghorns from 17 to 22 weeks of age were inoculated via eyedrop with the F strain of MG. Swabs were made from the trachea or the choanal cleft region (palatine fissure) when the chickens were 58 to 63 weeks of age; MG was isolated from 15 of 101 tracheal swab samples and from 51 of 108 choanal cleft swab samples. This study indicates that swabs taken from the choanal cleft region yield higher isolation rates and are more easily obtained than tracheal swabs.

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The detection of maternal antibodies tomycoplasma gallisepticumin chicks by the rapid serum agglutination and haemagglutination inhibition tests

Snell

Cullen

1977

Avian Pathology

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Eggs from hens infected with Mycoplasma gallisepticum and hens free from M. gallisepticum and M. synoviae were hatched and samples of blood were taken between 1 to 21 days after hatching. Antibodies (M. gallisepticum) responsible for both rapid serum agglutination (RSA) and haemagglutination inhibition were detected in the sera of progeny of infected hens, but these declined until they were undetectable by 18 days of age. By 4 days after hatching only approximately 65% of the birds were positive to the RSA test. This work re-emphasises the need to sample chicks early in life when attempting to detect maternally derived antibody.

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Serological and Cultural Studies of Chicken Breeding Flocks and Their Progeny for Mycoplasma

Cited by 7 publications

References 2 publications

Effects of time-specific F-strain Mycoplasma gallisepticum inoculation overlays on prelay ts-11-strain M. gallisepticum vaccination on digestive and reproductive organ characteristics of commercial egg-laying hens,

Effects of time-specific F-strain Mycoplasma gallisepticum inoculation overlays on prelay ts-11-strain M. gallisepticum vaccination on digestive and reproductive organ characteristics of commercial egg-laying hens,

Mycoplasma gallisepticum Isolation in Layers

The detection of maternal antibodies tomycoplasma gallisepticumin chicks by the rapid serum agglutination and haemagglutination inhibition tests

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