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Identification of variations in SzP proteins of Streptococcus equi subspecies zooepidemicus and the relationship between protein variants and clinical signs of infection in horses.
- Source :
-
American journal of veterinary research [Am J Vet Res] 2003 Aug; Vol. 64 (8), pp. 976-81. - Publication Year :
- 2003
-
Abstract
- Objective: To determine whether previously unidentified variations of the SzP protein of Streptococcus equi subsp zooepidemicus were present in horses with various clinical signs of infection and whether any relationship could be identified between SzP protein variants and naturally occurring clinical conditions.<br />Sample Population: 23 isolates of S equi subsp zooepidemicus were recovered from specimens of horses with various clinical conditions and used as a representative population of isolates for evaluation of different SzP protein variants.<br />Procedure: Genetic heterogeneity of the isolates was demonstrated by repetitive extragenic palindromic-polymerase chain reaction analysis. The SzP gene was sequenced and the presumed protein sequence determined for each isolate. Characteristics of the SzP proteins were compared among the isolates and in relation to the clinical conditions of horses from which they were recovered.<br />Results: The signal peptide types, number of proline-glutamic acid-proline-lysine repeats, and anchor sequences were consistent with those previously described for the SzP protein. Many of the isolates clustered with 5 previously described types on the basis of the hypervariable region of the SzP protein. One additional variant, which represented 8 of the isolates, was identified. Particular motifs in the hypervariable region accounted for many of the differences among hypervariable types.<br />Conclusions and Clinical Relevance: The SzP protein appears to be limited to a selected number of types. Variations in the SzP protein are frequently determined on the basis of different motifs rather than random amino acid substitutions. There does not appear to be any association of SzP protein variations and clinical manifestations of infection in horses.
- Subjects :
- Abortion, Veterinary microbiology
Abscess microbiology
Abscess veterinary
Amino Acid Sequence
Animals
Antigens, Bacterial chemistry
Bacterial Proteins chemistry
Cellulitis microbiology
Cellulitis veterinary
Endometritis microbiology
Endometritis veterinary
Female
Horses
Lymph Nodes microbiology
Lymph Nodes pathology
Male
Molecular Sequence Data
Phylogeny
Pneumonia microbiology
Pneumonia veterinary
Streptococcal Infections physiopathology
Surgical Wound Infection microbiology
Surgical Wound Infection veterinary
Antigens, Bacterial genetics
Bacterial Proteins genetics
Genetic Variation
Horse Diseases microbiology
Horse Diseases physiopathology
Streptococcal Infections microbiology
Streptococcal Infections veterinary
Streptococcus equi genetics
Subjects
Details
- Language :
- English
- ISSN :
- 0002-9645
- Volume :
- 64
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- American journal of veterinary research
- Publication Type :
- Academic Journal
- Accession number :
- 12926588
- Full Text :
- https://doi.org/10.2460/ajvr.2003.64.976