title: Lancefield grouping of streptococci isolated from guinea pig mammary gland and milk.
mesh_terms: D000818:Animals; D005260:Female; D006168:Guinea Pigs; D008321:Mammary Glands, Animal / Q000382:microbiology*; D008892:Milk / Q000382:microbiology*; D013291:Streptococcus / Q000276:immunology / Q000302:isolation & purification*