Lancefield groups C and G comprise a variety of species; one of those species, Streptococcus dysgalactiae subsp. equisimilis (SDSE), frequently causes human infections. This species can cause the whole spectrum of infections caused by S. pyogenes (4,5).
Snails belong to the class Gastropoda, a classification that includes land, freshwater and sea snails and slugs. Snailsâ ancestors are one of the earliest known types of animals in the world.
Limpets, mussels and barnacles on a rock in the intertidal zone. Gastropods, or univalves, are the largest and most successful class of molluscs. 60,000â75,000 known living species belong to it. Most of are marine, but many live in freshwater or on land. Their fossil record goes back to the later Cambrian. Slugs and snails, abalones, limpets, cowries, conches, top shells, whelks, and sea slugs are all gastropods. The gastropods are in origin sea-floor predators, though they did evolve into many other habitats. Many lines living today evolved in the ...