Serological identification of Streptococcus salivarius subsp. thermophilus.
Streptococcus salivarius subsp. thermophilus (Str. thermophilus) has no group-specific antigen. HCl extracts of 551 strains of streptococci isolated from cheese or yogurt (123 Str. thermophilus and 428 Enterococcus faecalis - Ent. faecium spp.) were examined with three type-specific antisera prepared against representatives of Str. thermophilus and also with Lancefield group D antisera. All typical (80) or atypical (43) strains of Str. thermophilus reacted with at least one type-specific antiserum and none of the enterococci reacted. Only two strains reacted with both type-specific and group antisera.
Nour
M A
MA
Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.
Abdel-Tawab
G
G
Shalaby
S
S
Mohamed
O A
OA
D000818:Animals; D000942:Antigens, Bacterial / Q000032:analysis*; D002611:Cheese; D013293:Enterococcus faecalis / Q000276:immunology / Q000302:isolation & purification*; D005516:Food Microbiology; D007106:Immune Sera / Q000276:immunology; D011817:Rabbits; D013291:Streptococcus / Q000276:immunology / Q000302:isolation & purification*; D015014:Yogurt
D000942:Antigens, Bacterial; D007106:Immune Sera