Production of Apx toxins by field strains of Actinobacillus pleuropneumoniae and Actinobacillus suis
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منابع مشابه
Production of Apx toxins by field strains of Actinobacillus pleuropneumoniae and Actinobacillus suis.
The three Apx toxins of Actinobacillus pleuropneumoniae have potential value for use in vaccines and diagnostic tests which will be species specific instead of serotype specific, provided that the Apx toxins are species specific and all field strains produce these toxins. We examined 114 A. pleuropneumoniae field strains and found that they secreted either ApxI, ApxII, ApxI and ApxII, or ApxII ...
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Results of serotyping of 122 strains of Actinobacillus pleuropneumoniae isolated on 21 swine farms in the Czech Republic from January 1999 to December 2000 are presented. The highest prevalence was found for serotype 9 (n = 81, 66.4%), followed by serotype 2 (n = 19, 15.7%). Serotypes 1, 3, 5, 7, 8, 11, and 12 were identified only sporadically. Twenty-six of the isolates were tested for gene-to...
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To establish the role of the Apx toxins in the pathogenesis of porcine pleuropneumonia, specific-pathogen-free pigs were inoculated deeply endobronchially with either culture filtrates of Actinobacillus pleuropneumoniae serotype 8 or 9, culture filtrates depleted of the Apx toxins by affinity chromatography, depleted culture filtrate supplemented with purified recombinant Apx toxins (rApx), or ...
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We have identified a highly transformable strain of Actinobacillus pleuropneumoniae whose competence is regulated by the competence-activator Sxy as in other Pasteurellaceae. Other strains were poorly transformable or nontransformable. The genomes of two poorly transformable strains contain intact sets of competence genes. Moreover, we show that the low competence of one of these strains is not...
متن کاملSerological characterisation of Actinobacillus pleuropneumoniae
In the most recent study on the serological characterisation of Australian isolates of A pleuropneumoniae, a large percentage of isolates either gave cross-reactions with serovars 3 and 6 (47/256 isolates) or no reaction at all (91/256 isolates).11 This study was performed using slide agglutination and GD, techniques which had performed effectively in the past.5 The high incidence of isolates t...
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ژورنال
عنوان ژورنال: Infection and Immunity
سال: 1994
ISSN: 0019-9567,1098-5522
DOI: 10.1128/iai.62.9.4063-4065.1994