ESTREPTOCOCOSIS PORCINA PDF

Meningitis bacteriana aguda por Streptococcus suis en criadores de cerdos: Comunicación de los primeros dos casos en Chile. Rev Chilena Infectol. Introduction. A sudden onset infection with the bacterium Erysipelothrix insidiosa (E. rhusiopathiae) seen in turkeys and increasingly in free-range chickens. aislados de Actinobacillus pleuropneumoniae,. de Pasteurella multocida, y de. Streptococcus suis recuperados de cerdos enfermos ó muertos de.

Author: Akinojind Shaktirisar
Country: Barbados
Language: English (Spanish)
Genre: Education
Published (Last): 8 December 2008
Pages: 345
PDF File Size: 6.10 Mb
ePub File Size: 20.50 Mb
ISBN: 390-3-33041-979-1
Downloads: 86892
Price: Free* [*Free Regsitration Required]
Uploader: Niran

PCR tests based on sequences of type-specific capsular genes have been developed, for other serotypes diagnostic methods although unreliable are available []. Saitou N, Nei M. Distribution of Streptococcus suis capsular types from to This bacterium is also a zoonotic agent responsible for meningitis and arthritis in humans in close contact with infected pigs []. Our results clearly showed low variation among the field strains recovered from diseased pigs at different farms and from those at the same farm over time.

In the present study, and for the first time, we phenotypically and genotypically analyzed strains isolated from diseased pigs at nonrelated farms in central Chile. Genetic analysis of Streptococcus estreptococosia isolates recovered from diseased and healthy carrier pigs at different stages of production on a pig farm.

Enfermedades causadas por Estreptococos by Lizzy Wonka on Prezi

The evolutionary distances were computed using the Kimura 2-parameter method [24]. The following media used were: Role of the capsular polysaccharide as a virulence factor for Streptococcus suis serotype Although not ideal, typing methods based on protein expression of these markers confirm the phenotype because the PCR assays only detect a partial sequence of a gene.

One representative Chilean isolate of serotype 6 was chosen and compared with the serotype-6 reference strain. Table I Field strains of Streptococcus suis used in this study as distributed by Chilean farm and year of isolation. Columbia agar, Columbia agar supplemented with 5 per cent of fibrinated sheep blood and Mac Conkey agar.

Meningitis bacteriana aguda por Streptococcus suis en criadores de cerdos: Elucidation of the DNA sequence of Streptococcus uberis adhesion molecule gene sua and detection of sua in strains of Streptococcus uberis isolated from geographically diverse locations. Open in a separate window. Enterobacterial repetitive intergenic consensus sequencebased polymerase chain reaction ERIC-PCR was carried out with 22 of the serotype-6 strains 6 strains were no longer viable and, for comparison purposes, the Danish serotype-6 reference strain to compare the strains genotypically.

  ABHISARIKA MAGAZINE PDF

Each isolate was tested under the same conditions twice. Five randomly chosen representative isolates of S. Interesting, this serotype has recently been described as a new species: Moreover, these PCR assays could be used directly with tonsillar specimens from infected or carrier animals so that isolation of single colonies could be omitted. Received Jan 8; Accepted Mar On the other hand, Moorkamp et al. Although little is known about potential virulence factors, such as the hemolysin suilysin SLY; encoded by the sly genethe muramidase-released protein MRP; mrpand the extracellular factor EF, epf are virulence markers that have been used in elaborated genotypic and phenotypic schemes to try to predict the virulence of a given S.

It is now included in routine diagnosis of S.

Other two conventional PCR assays were used to screen the presence of sly bp [21] and epf bp genes [17]. Canadian Council on Animal Care; Some strains from the same farm were recovered during different years.

Virus de la síndrome reproductiva i respiratòria porcina

In fact, they are available only from Brazil 2. The gene fragment encoding the MRP protein was amplified in cps 2 isolates from cases of pneumonia and asymptomatic animals; this fragment was de-tected in the four cps 9 isolates The function of the kDa MRP protein is unknown.

Presence of the Streptococcus suis suilysin gene and expression of MRP and EF correlates with high virulence in Streptococcus suis type 2 isolates. Clinical problems due to S. Interestingly, cases of S. ABSTRACT Enzootic pneumonia EP is characterized by high morbidity and low mortality, and although pigs of all ages are susceptible to Mycoplasma hyopneumoniae infection, a variety of other respiratory pathogens plays an important role in the development of Porcine Respiratory Disease Complex PRDC like Actinobacillus pleuropneumoniaeBordetella bronchisepticaPasteurella multocidaStreptococcus suisinfluenza virus and porcine circovirus type 2 PCV Virulence factors and pathogenesis of S.

  CHARTWORK FOR MARINERS PDF

The prevalence of EP is particularly high in animals of mid-finishing to slaughter age.

Worldwide, capsular serotype 2 cps 2 is the most prevalent one among invasive porcine and human isolates [9, 10]. A variety of other respiratory pathogens plays an important estreotococosis in the development of PRDC like Actinobacillus pleuropneumoniaeBordetella bronchisepticaPasteurella multocidaStreptococcus suisinfluenza virus and porcine circovirus type 2 PCV-2 which are also potential pathogens to contribute to PRDC [9]. The PCR assays used in this study can differentiate the three cps genotypes 2, 7 and 9 and additionally detect the important virulence associated factors genes mrpepf and sly Table estreptocofosis.

The survival of Streptococcus suis on farm and veterinary equipment. Distribution of capsular types and production of muramidase-released protein MRP and extracellular factor EF of Streptococcus suis strains isolated from diseased pigs in seven European countries. The disease is characterized by high morbidity and low mortality. The effective production of the virulence markers by the tested isolates specifically in the genotype cps 2 mrpepfsly would be also verified.

Band patterns were analyzed with the use of Bionumerics software, version 6. Dilemma of esyreptococosis of Streptococcus suis: Mycoplasma hyorhinis in the etiology of serositis among piglets. The 50 bp ladder Promega was used as standard. Streptococcus suis serotype 2, an important swine and human pathogen, induces strong systemic and cerebral porcna responses in a mouse model of infection.

The capsular genotype cps 2 was determined by PCR as previously described by Smith et al. Accepted for publication in September, In fact, this serotype is seldom isolated from diseased animals. Distribution and genetic diversity of suilysin in Streptococcus suis isolated from different diseases of pigs and characterization of the genetic basis of suilysin oorcina.

More studies about the virulence of this serotype are to come. National Center for Biotechnology InformationU.