Exploratory field study on Mycoplasma hyopneumoniae infection in suckling pigs

Sibila, Marina; Nofrarías, Miquel; López-Soria, Sergio; Segalés, Joaquím; Riera, Pere; Llopart, David; Calsamiglia, María

doi:10.1016/j.vetmic.2006.12.028

Cited by 77 publications

(94 citation statements)

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“…In some herds, more than 30% of the piglets were positive. This suggests that, in the selected herds, early infections with M. hyopneumoniae are important (Sibila et al, 2004(Sibila et al, , 2007Fano et al, 2005). As specific criteria were used to select the herds (clinical problems in grower-finishing pigs attributed to this pathogen), the results may not be generalised to all pig herds within the EU, but only to herds meeting the selection criteria.…”

Section: Discussionmentioning

confidence: 99%

“…The spread of M. hyopneumoniae occurs by either vertical transmission from the sow to the offspring (Sibila et al, 2007) or by horizontal transmission between pigs (Meyns et al, 2004;Fano et al, 2007). Sows transmit M. hyopneumoniae to their offspring mainly by direct nose-to-nose contact, as there is no transmission via the intra-uterine route, nor by colostrum or milk.…”

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confidence: 99%

“…Ruiz et al (2003) found 5.5-13.2% of piglets positive on a breeding farm at 19 days of age. Sibila et al (2007) performed nasal sampling in piglets from one and three weeks of age; the percentage of positive piglets ranged between 0 and 6.4%. Much higher infection rates were obtained by Fano et al (2007).…”

mentioning

confidence: 99%

“…Although the presence of DNA in nasal swabs is not a 100% guarantee for infection, it is certainly an indication that these animals were exposed to the organism. Sibila et al (2007) performed nPCR on bronchial and tonsillar swabs of 37 pigs at three weeks of age and they showed the presence of mycoplasmal DNA in the tonsils of one pig and in the bronchial swab of two other pigs. Infection of piglets during the suckling period is particularly important, since piglets are transferred to other pens and are usually regrouped with other piglets at weaning.…”

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Early Mycoplasma hyopneumoniae infections in European suckling pigs in herds with respiratory problems: detection rate and risk factors

Villarreal¹,

Vranckx²,

Duchateau³

et al. 2010

Vet. Med. - Czech

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ABSTRACT:The present study aimed at estimating the detection rate of M. hyopneumoniae in 3-week-old pigs in different European countries and to identify possible risk factors. Nasal swabs from suckling pigs in 52 farms were collected for nested PCR analysis. Potential risk factors for respiratory disease were analysed with a multivariable logistic regression model. The average percentage of positive piglets was 10.7% (95% confidence interval, CI 7.4-14.2); at least one pig tested positive in 68% of herds. In 32% of the herds, more than 10% of piglets tested positive. Herds that vaccinated sows against swine influenza virus (SIV) had a significantly higher risk of a piglet being positive for M. hyopneumoniae (OR 3.12; 95% CI 1.43-6.83). The higher risk in case of SIV vaccination is difficult to explain, but may be due to the fact that pig herds with respiratory symptoms are more likely to be vaccinated against SIV, overlooking the possible influence of other respiratory pathogens such as M. hyopneumoniae. The present findings show that M. hyopneumoniae is widespread in 3-week-old piglets across different European countries.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Early Mycoplasma hyopneumoniae infections in European suckling pigs in herds with respiratory problems: detection rate and risk factors

Villarreal¹,

Vranckx²,

Duchateau³

et al. 2010

Vet. Med. - Czech

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“…Em suínos, M. hyopneumoniae já foi detectado no trato respiratório inferior em suínos na maternidade, cujas mães eram sorologicamente positivas para este agente. Isto indica que os problemas respiratórios associados com este agente podem começar precocemente em uma granja em conseqüência da transmissão horizontal (Fano et al 2005, Sibila et al 2007). Trabalhos experimentais mostram que os sinais clínicos como tosse pode iniciar no período de 28 a 35 dias pós-infecção (Fano et al 2005 A alteração macroscópica característica da pneumonia por micoplasma em suínos é a consolidação lobular confluente das regiões crânio-ventrais dos pulmões.…”

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Pneumonia enzoótica em javalis (Sus scrofa)

Ecco

Lazzari²,

Guedes

2009

Pesq. Vet. Bras.

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RESUMO.-O objetivo desse estudo foi descrever o quadro clínico e epidemiológico, os achados patológicos, bacteriológicos e imuno-histoquímicos de um surto de pneumonia em uma granja de Javalis do Distrito Federal, Brasil. Em um período de cinco meses, morreram 90 javalis. Desses, 63 tinham lesões pulmonares. Clinicamente apresentavam atraso no desenvolvimento corporal, diminuição do apetite, letargia, tosse e dificuldade respiratória, principalmente quando movimentados. Constatou-se elevação da temperatura, 40 o C em média. Na auscultação, havia crepitações e estertores pulmonares de intensidade moderada. As alterações macroscópicas nos pulmões analisados eram típicas de broncopneumonia lobular. As lesões caracterizavam-se por consolidação crânio-ventral na maioria dos pulmões. A coloração variava de difusamente vermelho-escuro a um padrão mosaico (ló-bulos vermelho-escuros intercalados por lóbulos cinzas) ou difusamente acinzentados. Na maioria dos pulmões observou-se exsudato mucopurulento na luz dos brônquios e fluindo do parênquima. Histologicamente, as alterações eram de broncopneumonia purulenta e histiocitária com focos de necrose. Em alguns animais havia também hiperplasia do BALT e, na maioria dos animais, infiltração The aim of this paper is to describe the clinical, epidemiological, pathological, bacteriological and immunohistochemical aspects of a pneumonia outbreak in a wild pig farm in the Distrito Federal, Brazil. Ninety wild pigs died in a period of five months, and 63 of these had pulmonary lesions. Clinically, the pigs presented reduced growth rate, anorexia, lethargy, cough and dyspnea, especially after they were moved. High body temperature (40 o C in average) was verified in some animals. Auscultation revealed moderate pulmonary crepitation and stertors. Pulmonary gross lesions were typical of lobular bronchopneumonia. Lung lesions were characterized by ventral-cranial consolidation in the majority of the cases. The color of affected pulmonary areas varied from diffuse dark red to mosaic pattern (dark red lobule intercalate by grayish lobule) or diffusely grayish. The majority of the lungs had mucopurulent exsudate in the bronchial lumen that also drained from the parenchyma cut surface. Upon microscopy, the changes were characterized by purulent and histiocytic bronchopneumonia with necrotic foci. In some animals, there was BALT hyperplasia associated with perivascular and peribronchial plasma cells and lymphocytes infiltration in most of these cases. Bordetella bronchiseptica and Streptococcus spp. were the most frequently isolated bacteria. Immunohistochemistry evaluation demonstrated Mycoplasma hyopneumoniae on the luminal surface of bronchial and bronchiolar epithelial cells, and the DNA of bacteria was detected by PCR. This is the first report of bronchopneumonia in wild boars associated with M. hyopneumoniae infection.

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Mycoplasmosis

Pieters¹,

Maes²

2019

Diseases of Swine

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Exploratory field study on Mycoplasma hyopneumoniae infection in suckling pigs

Cited by 77 publications

References 7 publications

Early Mycoplasma hyopneumoniae infections in European suckling pigs in herds with respiratory problems: detection rate and risk factors

Early Mycoplasma hyopneumoniae infections in European suckling pigs in herds with respiratory problems: detection rate and risk factors

Pneumonia enzoótica em javalis (Sus scrofa)

Mycoplasmosis

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