Relative Risk Estimation for Mycoplasma synoviae in Backyard Chickens in Paraguay

Suzuki, Kuniaki; Origlia, Javier; Álvarez, F.; Faccioli, M.; Silva, M.; Caballero, Juan; Núñez, L; Castro, L.

doi:10.3923/ijps.2009.842.847

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…Our results are the first documentation of the presence of MS in backyard chickens in Mozambique and are consistent with seroprevalence in fancy breeding chickens of 75% in Switzerland [ 26 ], where the management system is equivalent to the one in backyard poultry flocks. Lower prevalence was reported in Botswana (40.99%) [ 14 ] and Paraguay (53%) [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

Serological Screening Suggests Extensive Presence ofMycoplasma gallisepticumandMycoplasma synoviaein Backyard Chickens in Southern Mozambique

Júnior

Taunde

Zandamela³

et al. 2017

Journal of Veterinary Medicine

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A total of 459 serum samples from unvaccinated backyard chickens originating from 4 villages in Mandlakazi district, Southern Mozambique, were tested for the presence of Mycoplasma gallisepticum and Mycoplasma synoviae antibodies through commercial enzyme-linked immunoabsorbent assay [ELISA] kits. Anti-MG and anti-MS antibodies were detected in all villages surveyed and the overall seroprevalence was 48.8% [95% CI 39.1–57.8] and 84.5% [95% CI 76.8–90.4], respectively. The risk of being seropositive for both diseases was higher [P < 0.05] in Chidenguele village than other villages. It is concluded that MG and MS serum antibodies are present in backyard chickens.

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Section: Resultsmentioning

confidence: 99%

Serological Screening Suggests Extensive Presence ofMycoplasma gallisepticumandMycoplasma synoviaein Backyard Chickens in Southern Mozambique

Júnior

Taunde

Zandamela³

et al. 2017

Journal of Veterinary Medicine

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“…On the other hand, access to an outdoor course increases the risk of exposure to MS infections, because biosecurity measures cannot be as strict as in closed buildings. Presence of MS in backyard chickens [ 29 , 35 , 39 , 40 ], wild birds [ 8 , 41 , 42 ] or in other neighboring farms can therefore be a higher source of infection [ 10 , 15 , 25 ]. Multi-age farms can also increase the risk of infection between flocks in ALT or FC systems [ 9 , 10 , 18 ].…”

Section: Discussionmentioning

confidence: 99%

Investigation on eggshell apex abnormality (EAA) syndrome in France: isolation of Mycoplasma synoviae is frequently associated with Mycoplasma pullorum

et al. 2020

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Background: Mycoplasma synoviae (MS) is known to cause Eggshell Apex Abnormality (EAA) syndrome characterized by an altered shell surface with increased translucency on the apex. However, no large-scale studies have been conducted to obtain prevalence data of EAA and MS isolates associated to this syndrome. This manuscript reports the results of two field studies performed in the French poultry industry (2015-2017): focusing mainly on investigation of presence and prevalence of EAA in different types of laying hen flocks (phase 1), and isolation of MS strains from EAA-infected flocks (phase 2). Results: The first survey included 77 farms of commercial layers in three French egg-production regions, hosting 40 flocks in alternative systems (ALT) and 56 in furnished cages (FC). Seven flocks (4 FC and 3 ALT) presented EAA clinical signs, giving a prevalence of 7.3% in this studied sample. A second independent field study was conducted to identify MS by in vitro cultivation and PCR in samples from 28 flocks with clinical signs of EAA. Different types of biological specimens were collected in EAA-affected flocks and submitted to the laboratory. M. synoviae was detected in 25/28 flocks, from both production systems (5/5 ALT and 20/23 FC). Detection of MS was significantly higher in tracheal swabs (59%) than in cloacal (10.5%), albumen (3.6%) and egg yolk (1.1%) swabs. It is worth to mention that attempts to clone MS from positive samples were often hampered by the presence of another Mycoplasma species, which showed fast growing behaviour in the selective media used in this study (Frey Medium 4 and Frey Medium 4 supplemented with erythromycin). The use of MALDI-TOF mass spectrometry in combination with next-generation sequencing (NGS) results allowed the identification of this fast growing mycoplasma as Mycoplasma pullorum, which was detected in 14 of the 25 (56%) MS-positive flocks.

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“…It seems that MS is widely spread (Kleven and Noel, 2008). Buim et al (2009) showed that mycoplasmas was isolated from 72.7% of poultry farms in Brazil by multiplex PCR with predominance of MS. Suzuki et al (2009) reported seroprevalence of MS was 53% by Elisa test with the high rate of MS infection. In the Germany, 84% of commercial layer flocks during laying period were positive for mycoplasmas in PCR test, while 75% turned out positive for MS and all were negative for MG (Köhn et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Seroprevalence of Mycoplasma gallisepticum and Mycoplasma synoviae infection in the commercial layer flocks of the Centernorth of Iran

Haghighi-Khoshkhoo¹,

Akbariazad²,

Roohi³

et al. 2011

Afr. J. Microbiol. Res.

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Relative Risk Estimation for Mycoplasma synoviae in Backyard Chickens in Paraguay

Cited by 11 publications

References 8 publications

Serological Screening Suggests Extensive Presence ofMycoplasma gallisepticumandMycoplasma synoviaein Backyard Chickens in Southern Mozambique

Serological Screening Suggests Extensive Presence ofMycoplasma gallisepticumandMycoplasma synoviaein Backyard Chickens in Southern Mozambique

Investigation on eggshell apex abnormality (EAA) syndrome in France: isolation of Mycoplasma synoviae is frequently associated with Mycoplasma pullorum

Seroprevalence of Mycoplasma gallisepticum and Mycoplasma synoviae infection in the commercial layer flocks of the Centernorth of Iran

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