title: The effect of dietary penicillin on the growth of gnotobiotic chickens monoassociated with Streptococcus faecium.
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002645:Chickens / Q000254:growth & development*; D005503:Food Additives; D005856:Germ-Free Life; D007422:Intestines / Q000382:microbiology; D010402:Penicillin G Procaine / Q000494:pharmacology*; D013045:Species Specificity; D013291:Streptococcus / Q000187:drug effects* / Q000254:growth & development
chemical_list: D005503:Food Additives; D010402:Penicillin G Procaine