title: Studies on biochemical variants of Sh. flexneri. I. Studies on the lactose positive variants of Sh. flexneri 2a.
mesh_terms: D002031:Bulgaria; D004405:Dysentery, Bacillary / Q000382:microbiology; D005827:Genetics, Microbial; D006801:Humans; D007785:Lactose / Q000096:biosynthesis; D012763:Shigella flexneri / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism; D013045:Species Specificity
chemical_list: D007785:Lactose