Pasteurella

Boyce, John D.; Harper, Marina; and, I. W. Wilkie; Adler, Ben

doi:10.1002/9780470958209.ch17

Cited by 38 publications

(35 citation statements)

References 137 publications

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“…These data are consistent with literature reports of a higher participation of serotype A in pneumonic cases (Borowski 2001, Davies et al 2003, Pijoan 2006, Borowski et al 2007, Bethe et al 2009, Boyce et al 2010 and corroborate the data of Heres (2009). However, Morés (2006) found a higher frequency of serotype D (27.3%) compared to serotype A (24%) in samples obtained in slaughterhouses.…”

Section: Discussionsupporting

confidence: 93%

“…In addition, the toxA gene, which encodes the dermonecrotic toxin, was detected only in two clinical samples originating from the same herd. The importance of this toxin in swine pleuropneumonia is questionable (Pijoan 2006, Borowski et al 2007, Boyce et al 2010) since other studies have reported the absence of this gene in isolates obtained from porcine lung samples (Borowski et al 2002, Heres 2009, Hansen et al 2010, Costa et al 2011, as was also observed in this study. The pathologic evaluation of the samples revealed the expected type of alterations, in agreement with the literature (Pijoan 2006, Caswell & Williams 2007.…”

Section: Discussionsupporting

confidence: 62%

“…Nevertheless, researches performed so far could not determine the pathogenesis and its invasiveness mechanisms (Bethe et al 2009, Pors et al 2011. It is necessary to determine the unknown virulence factors that lead to more severe clinical conditions than those that are traditionally known and reported, and to establish a clonal relationship among strains obtained from field samples (Borowski et al 2002, Boyce et al 2010. Davies et al (2003) stated that outer membrane proteins exhibit heterogeneity among strains and that this may be a good marker to determine epidemiological relationships between them.…”

Section: Discussionmentioning

confidence: 99%

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Anatomopathological pneumonic aspects associated with highly pathogenic Pasteurella multocida in finishing pigs

et al. 2017

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The bacterium Pasteurella multocida is a frequent cause of porcine respiratory disease complex in finishing pigs. Historically, the bacterium is recognized as an opportunistic agent, causing secondary bacterial pneumonia in pigs. Several Brazilian reports have suggested the ability of P. multocida to cause primary pulmonary infection that leads to the death of finishing pigs prior to slaughter. The aim of this study was to evaluate anatomopathological pulmonary findings associated with P. multocida infection that were obtained from animals with clinical respiratory disease and from animals at slaughter. Twenty-five lung samples from 14 herds of finishing pigs with acute clinical respiratory disease and 19 lungs collected at slaughter from a different set of 14 herds were studied. In all lung samples, bacterial isolation was performed, and only samples with pure P. multocida growth were included in the study. Gross and histopathological lesions were evaluated, as well as Influenza A, porcine circovirus type 2 (PCV2) and Mycoplasma hyopneumoniae co-infections. Pleuritis and pericarditis were more often observed in clinical samples (P<0.05). Moreover, there was a numerical trend indicating that pericarditis, lymphadenomegaly and cavity exudates were more often present in clinical samples. Thirteen lung samples were negative to M. hyopneumoniae, Influenza A and PCV2 by immunohistochemistry (IHC), with only P. multocida identified. In these cases, gross lesions such as pleuritis, pericarditis and lymphadenomegaly were always present, and no histologic lesions indicative of other agents such as Actinobacillus pleuropneumoniae, Actinobacillus suis or Haemophilus parasuis were observed. These findings suggest the ability of some P. multocida isolates to cause primary respiratory and systemic infection. However, in this study, it was not possible to determine specific virulence markers to explain these findings.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

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Anatomopathological pneumonic aspects associated with highly pathogenic Pasteurella multocida in finishing pigs

et al. 2017

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“…Esta bactéria é transmitida por pequenas quantidades de partículas suspensas no ar e pelo contato direto com animais doentes, sendo capaz de causar patologias como a cólera aviário, septicemia e pneumonia em bovinos, rinite atrófi-ca progressiva, pleurisia e pneumonia em suínos (Boyce et al 2010). Uma vez que faz parte da microbiota da mucosa oral de cães e gatos, casos de pasteurelose em humanos são geralmente associadas ao contato com esses animais, através de mordeduras e/ou arranhaduras (Collins et al 2012, Nagata et al 2013, Nguefack et al 2014.…”

Section: Introductionunclassified

Ocorrência de genes tad associados à formação de biofilme em isolados de Pasteurella multocida de pulmões de suínos com pneumonia

et al. 2014

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Os atuais sistemas de criação intensiva de suínos aumentam a pressão de seleção microbiana propiciando a disseminação de doenças respiratórias. A bactéria Pasteurella multocida é associada a diversas patologias respiratórias em animais submetidos a esse tipo de criação, causando grandes perdas econômicas. A formação de biofilme foi descrita in vitro em P. multocida e fatores analisados indicaram a facilitação na colonização dos tecidos, aumentando a resistência às defesas do hospedeiro e aos antibióticos. Os objetivos deste trabalho foram analisar a ocorrência de P. multocida em pneumonias de suínos e na microbiota de pulmões sem lesão e a ocorrência dos genes do lócus tad nestes isolados. Foram analisados 70 isolados de P. multocida de pulmões, sendo sessenta e sete com lesão e três sem lesão. Isolados do sorotipo A ocorreram principalmente em pulmões com lesões (85,71%), enquanto em pulmões sem lesão observou-se somente o sorotipo D. Os genes tadA, tadB, tadC, tadD, tadE tadF e tadG estavam presentes em 89,55% dos isolados de pulmões com lesões. Os genes tadA, tadB e tadC estavam presentes em todos os isolados de pulmões sem lesão, porém os genes tadD, tadE, tadF e tadG estavam presentes em 0%, 33,3%, 33,3% e 66,6%, dos isolados sem lesão, respectivamente. Neste trabalho observou-se a associação da ocorrência dos genes tadD, tadE e tadF em isolados de P. multocida e a presença de lesões em pulmões.

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“…2 Pasteurella multocida shows considerable variety in phenotypic properties 5,9,14 causing frequent confusion in the exact identification and definition of this species. DNA-DNA hybridization-based reclassification of the genus Pasteurella Trevisan 1887 led to the recognition of 3 P. multocida subspecies: subsp.…”

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confidence: 99%

Sequencing-independent method for the differentiation of the main phylogenetic lineages ofPasteurella multocida

2012

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Abstract.A rapid, easy method involving a polymerase chain reaction (PCR) assay followed by restriction fragment length polymorphism (RFLP) analysis was developed to differentiate the 2 phylogenetic lineages of Pasteurella multocida. The PCR targeted the 16S ribosomal RNA gene, and the RFLP involved separate digestions with HindIII, EarI, and MlsI. The method was applied to 16 isolates of P. multocida from different hosts and the isolates were clearly assigned to 1 of the 2 lineages. The phylogenetic lineages did not match with the phenotypic-based identification at the subspecies level.

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Pasteurella

Cited by 38 publications

References 137 publications

Anatomopathological pneumonic aspects associated with highly pathogenic Pasteurella multocida in finishing pigs

Anatomopathological pneumonic aspects associated with highly pathogenic Pasteurella multocida in finishing pigs

Ocorrência de genes tad associados à formação de biofilme em isolados de Pasteurella multocida de pulmões de suínos com pneumonia

Sequencing-independent method for the differentiation of the main phylogenetic lineages ofPasteurella multocida

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