Site Overlay


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: Mobar JoJonris
Country: Barbados
Language: English (Spanish)
Genre: Science
Published (Last): 16 March 2008
Pages: 488
PDF File Size: 11.15 Mb
ePub File Size: 10.33 Mb
ISBN: 440-3-31025-759-2
Downloads: 58316
Price: Free* [*Free Regsitration Required]
Uploader: Nikojin

Co-infection with the previous detailed additional pathogens results in fever, anorexia and labored breathing [1, 2].

Virus de la síndrome reproductiva i respiratòria porcina – Viquipèdia, l’enciclopèdia lliure

Mycoplasma hyorhinis infection levels in lungs of piglets with porcine reproductive and respiratory syndrome Estre;tococosis. Clinical and Laboratory Standards Institute. The relevance of particular serotypes can vary geographically, even temporally. The estreptlcocosis relationship among the strains was shown with a tree Figure 1indicating a tight clustering of the SS13 isolate JF with known serotypes of S.

Streptococcus suis is a bacterial pathogen of global importance, able to induce meningitis, sepsis, and arthritis in piglets and grower—finisher pigs 1. Detection of respiratory pathogens in porcine lung tissue and lavage fluid. Serotype distribution and production of esttreptococosis protein, extracellular factor and suilysin by field strains of Streptococcus suis isolated in the United States. Some strains from the same farm were recovered during different years.

Amplified products were stained with ethidium bromide 0. Clinical problems due to S. The capsular genotype cps 2 was determined by PCR as previously described by Smith et al.

Dee and Corey [28] reported that S. Surface-associated and secreted factors of Streptococcus suis in epidemiology, pathogenesis and vaccine development. Further studies with a larger number of Cuban isolates are required to definitively confirm this hypothesis.

Virus de la síndrome reproductiva i respiratòria porcina

Presence of the Streptococcus suis suilysin gene and expression of MRP and EF correlates with high virulence in Streptococcus suis type 2 isolates.

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. Serotyping with use of the coagglutination test revealed that all but 1 strain belonged to serotype 6; the remaining strain was serotype The 31 isolates of S. It is quite unusual to find a common serotype among so many strains recovered from different herds of a region or country.


Virulence can vary substantially both within and among serotypes, and not all isolates of the same serotype cause the same disease [4].

Virulence-associated gene profiling of Streptococcus suis isolates by PCR. Genetic analysis of Streptococcus suis isolates recovered from diseased and healthy carrier pigs at different stages of production on a pig farm. The samples were cultured bacteriologically on the day they were collected, and a semiquantitative examination for specific colony types was performed. 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.

Author information Article notes Copyright and License information Disclaimer. The prevalence of EP is particularly high in animals of mid-finishing to slaughter age.

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.

Comparative evaluation of virulence and pathology of Streptococcus suis serotypes 2 and 9 in experimentally infected growers.

Data regarding serological and molecular identification of S. Very few data are available concerning serotype distribution of S.

PCR The isolates were identified by conventional biochemical procedures following the methods reported by Berthelot-Herault et al. Samples were taken in the apical, frontal, medial and diaphragmatic lobules.

Similarity among the field strains analyzed was further confirmed by the fact that all the serotype-6 strains tested presented the same antibiotic-sensitivity profile: Despite the lack of evidence for a critical role of one or more of these putative virulence factors, they may nonetheless serve as virulence markers, since MRP, EF, and SLY are typical of Eurasian strains while they are almost absent among less virulent North American strains.

Although the murine model has been successfully used to study serotypes 2 1014 14and 9 M. Capsular genotypes cps 7 and cps 9, and the mrp bp gene were analyzed by monoplex PCR assays using the sequence of primers and conditions described previously by Silva et al.

Estudio de la sensibilidad in vitro frente a diferentes antimicrobianos en cepas de S. Detection of Mycoplasma hyopneumoniae in nose swabs from pigs by in vitro amplification of the 16S rRNA gene.


The 10 mice inoculated with the Danish serotype-6 reference strain and the 10 mice inoculated with a serotype-6 Chilean strain from the current study, however, showed no clinical signs of septicemia or meningitis during 10 d of observation after inoculation. Diagnosis and differentiation of Mycoplasma hyopneumoniae and Mycoplasma hyorhinis infections in pigs by PCR amplification of the p36 and p46 genes.

A total of pig lungs with typical EP lesions were processed by molecular techniques. Mycoplasma hyorhinis in the etiology of serositis among estreptococosi. Epub Jun etsreptococosis Diagnosis and isolation of swine pneumonia pathogen.

The right lung has been usually more affected than the left one, showing a estreptococois abundant bronchogenic distribution [18] with the SEP lesions, varying according to the disease phase and the likely secondary complications at the moment of the inspection [17]. 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 Epidemiological data have revealed a high diversity of serotypes among S.

PCR tests based on sequences of type-specific capsular genes have been developed, for other serotypes diagnostic methods although unreliable are available []. When we experimentally infected 26 mice, using a well-standardized model, to evaluate the potential virulence of a representative Chilean strain, we found that all 6 animals in the positive-control group those inoculated with a serotype-2 strain showed, as expected 10clinical signs of depression at 4 h, and all died during the 2nd day after infection.

Reports about the isolation of this bacterium from pigs suffering arthritis and pneumonia are frequent [4]; thus, a potential causative role of thisorganism in respiratory diseases is also suggested [26].

Gottschalk M, Segura M.