Experimental toxoplasmosis in broiler chicks

Kaneto, Carlos Noriyuki; Costa, Alvimar José da; Paulillo, Antônio Carlos; Moraes, Flávio Ruas de; Murakami, Tadamasa; Meireles, Marcelo Vasconcelos

doi:10.1016/s0304-4017(96)01126-0

Cited by 55 publications

(45 citation statements)

References 11 publications

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“…Sedlák et al (2000) detected antibodies at 2 wpi after oral infection of chickens with 10 5 oocysts. Earlier, Kaneto et al (1997) stated that chickens inoculated orally with T. gondii oocysts developed IFAT antibodies, but did not provide quantitative data.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Toxoplasma gondii indirect fluorescent antibodies in naturally- and experimentally-infected chickens (Gallus domesticus) in Thailand

Chumpolbanchorn

Anankeatikul

Ratanasak

et al. 2009

Acta Parasitologica

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Toxoplasma gondii infections in free-range (FR) chickens (Gallus domesticus) are potential public health risks. Antibodies for T. gondii were found in 194 out of 303 serum samples (64.03%) from FR chickens in Thailand tested by the indirect fluorescent antibody test (IFAT, 1:16). To verify the validity of serologic data in this survey, sera from chickens experimentally infected with the RH strain of T. gondii were tested by the IFAT. Antibodies against T. gondii were detected as early as 7 days p.i., peaked at 2 weeks, and then declined by 10 weeks p.i.

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Section: Discussionmentioning

confidence: 99%

Prevalence of Toxoplasma gondii indirect fluorescent antibodies in naturally- and experimentally-infected chickens (Gallus domesticus) in Thailand

Chumpolbanchorn

Anankeatikul

Ratanasak

et al. 2009

Acta Parasitologica

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“…However, the results presented in this paper show that, depending on the management and sanitary conditions of the farm, the broilers can and should be considered as a source of infection. Several studies describe the isolation of the parasite not only in muscles but also in organs such as heart, liver and gizzard (Kaneto et al 1997, Dubey et al 2002, Dubey et al 2006). This fact, associated with inadequate cooking of meat and/or viscera, as in microwave and grills, reinforce this assertion.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of infection with Toxoplasma gondii and factors associated with transmission in broiler chickens and laying hens in different raising systems

Millar

Alves²,

Teixeira³

et al. 2012

Pesq. Vet. Bras.

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Toxoplasmosis is a zoonotic disease caused by the protozoan Toxoplasma gondii. The aim of the present study was to determine the occurrence and identify the risk factors associated with transmission of T. gondii to chickens raised in different systems (free-ranged and conϐined) to produce eggs or meat. The 810 animals were allocated in two experimental groups according to the production system purpose: 460 broiler chickens (Group 1) and 350 layer chickens (Group 2). In order to analyze the possible factors involved in T. gondii infection in the chickens, an epidemiological questionnaire was developed for all properties.The serological detection of anti-Toxoplasma gondii antibodies was performed by Indirect Immunoϐluorescence (IFAT) and by Enzime Linked Imunossorbent Assay (ELISA). Since the agreement index (kappa) between these two serological techniques was considered high, 21.2% of the 810 animals were considered reactive. In Group 1, 12.2% (56/460) were positive, while in the Group 2 the positivity rate was 33.1% (116/350). The production system may be inϐluencing the seropositivity of the animals in both groups. However, only in Group 2 it was possible to notice a statistically signiϐicant relationship between the breeding system and the frequency of positive sera. This result indicates that, at least for laying hens, the production system is directly involved in T. gondii infection. The contact with cats in Group 1 did not inϐluence the distribution of seroreactive animals, but in Group 2 a signiϐicant relationship was observed. The occurrence of anti-T. gondii antibodies was high in both groups (broiler and posture chickens). Free-ranged chickens raised for egg production proved to be the most exposed group to the T. gondii infection. This can be related to the fact that these animals stay for longer periods in the farms, in direct contact with possibly contaminated soil by the presence of domestic cats.INDEX TERMS: Toxoplasma gondii, broiler chickens, laying hens, transmission.RESUMO.-[Ocorrência da infecção por Toxoplasma gondii e fatores associados à sua transmissão em aves de corte e postura produzidas em diferentes tipos de criação.] A toxoplasmose é uma zoonose causada pelo protozoário Toxoplasma gondii. O objetivo deste estudo foi determinar a ocorrência e identiϐicar os fatores de risco associados à transmissão de T. gondii para frangos criados em diferentes sistemas (caipira e conϐinado) para produzir ovos ou carne. Os 810 animais foram divididos em dois grupos experimentais de acordo com o propósito do sistema de produção: 460 frangos de corte (Grupo 1) e 350 galinhas poedeiras (Grupo 2). A ϐim de analisar os possí- symptoms of toxoplasmosis in birds, even those infected with virulent strains, are rarely reported (Hepding 1939, Fankhauser 1951, Nobrega et al. 1967, Dubey et al. 2002, Dubey et al. 2006, thus chickens are considered resistant to clinical toxoplasmosis. Torticollis, inability to stand, lateral recumbency and anorexia are clinical signs already described (Dubey et al. 2007, Dubey 201...

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“…Kanatlılarda deneysel toksoplazmoziste klinik bulgular bildirilmiştir (1,3,4,13,19,26,27,42). Bu çalışmada da özellikle 10 5 İM yola T. gondii takizoiti verilen grupta bir bıldırcında tortikollis, ataksi ve tremorlarla karekterize sinirsel bulgular saptanmıştır.…”

Section: Yöntemlerunclassified

“…Birçok kanatlı türünde doğal (4,22,23,25,26,44,45,48) ve deneysel (7,9,10,(16)(17)(18)(19)(20)37) toksoplazmozis olgularında çeşitli serolojik testler ile enfeksiyonun seropozitifliği saptanmıştır. Baykuş ve güvercinlerde Modifıye aglutinasyon testi (MAT) (25); tavuklarda MAT, Latex aglutinasyon testi (LAT), İndirekt Hemaglutinasyon testi (IHA), ELISA, Sabin-Feldman Dye Test (SFDT) (10); hindilerde MAT (22,26); hindi, tavuk ve ördeklerde MAT (23) ile toxoplazmozis saptanmıştır.…”

Section: Yöntemlerunclassified

“…Evcil kanatlılarda doğal toksoplazmozis olgularının yanında beyaz bıldırcınlar, Japon bıldırcınları, tavuk, broiler, güvercin, hindi ve sülünler gibi birçok kanatlı türünde deneysel çalışmalar yapılmıştır (7,10,(15)(16)(17)(18)(19)(20). Toxoplasma gondii enfeksiyonları ağırlıklı olarak ticari kümes ünitelerinde veya küçük boyutlu kümeslerde bildirilmesine karşın (1,3,13), yaygınlığı hakkındaki bilgiler kısıtlıdır.…”

Section: Introductionunclassified

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