<prompt> 45 yrs old Ramlal has intraabdominal sepsis. The causative organism was found to be vancomycin, gentamycin and ampicillin resistant. It grows well in presence of 6.5 NaCl and arginine. Bile ascenlin hydrolysis is positive. Which of the following is this organism?Streptococcus agalactaeEnterococcus fecalisStreptococcus bovisStreptococcus pneumoneae  <response>: Ans. is b i.e. Enterococcus fecalis Enterococcus belongs to Group D of Lancefield classification of Streptococci.Group D includesEnterococcal groupNon enterococcal group eg. Strep bovis.CHARACTERISTICS OF MEDICALLY IMPORTANT STREPTOCOCCIOrganismGroupHemolysisHabitatLaboratory propertyDiseasesStreptococcus pyogenesABetaThroat, skin Inhibited by bacitracinPYR test positivePharyngitis,impetigo,Rheumatic fever,glomerulonephritisStreptococcus agalactiaeBBetaFemale genital tract CAMP test M.C. cause of neonatal meningitis sepsisViridans streptococcus Alpha noneMouth, throat, colon, female genital tractColony not soluble in bileDental caries S.mutansendocarditis abscessStreptococcus pneumoniaeNoneAlphaThroatSusceptible to Optochin, colony bile soluble,Quellung vePneumoniameningitis,endocarditisPeptostrep- tococcusNoneNone, alphaMouth, colon, female genital tractObligate anaerobesAbscesses 