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Genomic deoxyribonucleic acid restriction fragment length polymorphism of Streptococcus uberis: evidence of clonal diversity. 1993

B M Jayarao, and E E Schilling, and S P Oliver
Department of Animal Science, University of Tennessee, Knoxville 37901-1071.

Fifty plasmid-free strains of Streptococcus uberis, including 40 strains isolated from cows in two dairy herds in Tennessee with subclinical and clinical mastitis, 9 strains isolated from cows in the US, and 1 strain from Great Britain were examined for genomic DNA restriction fragment length polymorphisms. The 50 strains belonged to 35 DNA fingerprint patterns. Within a herd, fingerprint patterns from isolates obtained from cows with subclinical mastitis at different periods of the lactation cycle and from episodes of clinical mastitis were similar. Restriction fragment length polymorphism analysis revealed the presence of DNA fragments > or = 21 kb in all 12 strains of S. uberis isolated from episodes of clinical mastitis and in only 8 of the 38 (21%) remaining strains. Cluster analysis placed the 50 strains into eight distinct clusters. Most strains from the northeastern US were confined to one cluster, whereas most of the isolates from episodes of clinical mastitis belonged to two different clusters. These data suggest that clonal diversity exists among strains of S. uberis isolated from bovine mammary secretions.

UI MeSH Term Description Entries
D012150 Polymorphism, Restriction Fragment Length Variation occurring within a species in the presence or length of DNA fragment generated by a specific endonuclease at a specific site in the genome. Such variations are generated by mutations that create or abolish recognition sites for these enzymes or change the length of the fragment. RFLP,Restriction Fragment Length Polymorphism,RFLPs,Restriction Fragment Length Polymorphisms
D002417 Cattle Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor. Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D004269 DNA, Bacterial Deoxyribonucleic acid that makes up the genetic material of bacteria. Bacterial DNA
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species
D013291 Streptococcus A genus of gram-positive, coccoid bacteria whose organisms occur in pairs or chains. No endospores are produced. Many species exist as commensals or parasites on man or animals with some being highly pathogenic. A few species are saprophytes and occur in the natural environment.
D016172 DNA Fingerprinting A technique for identifying individuals of a species that is based on the uniqueness of their DNA sequence. Uniqueness is determined by identifying which combination of allelic variations occur in the individual at a statistically relevant number of different loci. In forensic studies, RESTRICTION FRAGMENT LENGTH POLYMORPHISM of multiple, highly polymorphic VNTR LOCI or MICROSATELLITE REPEAT loci are analyzed. The number of loci used for the profile depends on the ALLELE FREQUENCY in the population. DNA Fingerprints,DNA Profiling,DNA Typing,Genetic Fingerprinting,DNA Fingerprint,DNA Fingerprintings,DNA Profilings,DNA Typings,Fingerprint, DNA,Fingerprinting, DNA,Fingerprinting, Genetic,Fingerprintings, DNA,Fingerprintings, Genetic,Fingerprints, DNA,Genetic Fingerprintings,Profiling, DNA,Typing, DNA,Typings, DNA

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