Gram + Flashcards
(8 cards)
Klebs-Loeffler’ bacillus
Gram positive bacilli in Chinese letters or palisades
Specialized structure:
Pili
Fimbriae
NM, NSF
catalase (+)
diphtheroids: used to present Corynebacteria that are non pathogenic
Corynebacterium diphteriae
Gram positive bacilli in short chain
Specialized structure:
Spores
Bacillus subtilis
Anthrax bacillus
Gram positive bacilli in long chaín
Specialized structure:
Spores
Glycocalyx
NM
Central or subterminal spores
BAM: non hemolytic
Díagnostic tests:
Catalase (+)
Produces acid from glucose, sucrose and maltose
Bacillus anthracis
Canned-good bacillus
Gram positive bacilli in singles
Morphological characteristics:
Flagella
Pili
Endospore
BAM: beta hemolytic
Diagnostic test:
Indole (-)
Ferment glucose only
Clostridium botulinum
CN: pneumococcus
Normal Flora of the Upper Respiratory Tract
Morphological and cultural:
Gram positive diplococci in lancet shape
Specialized structure:
Capsule
BAM: alpha hemolytic, mucoid
Diagnostic tests rxn:
Catalase (-)
Streptococcus pneumoniae
group A streptocoссі
Normal flora of upper respiratory tract and skin
Morphological and cultural:
Gram positive cocci in chain/diplo/singles
NM, NSF
Specialized structure:
Capsule
Pili
BAM: beta hemolytic
Diagnostic test rxn:
catalase (-),
Streptococcus pyogenes
Normal flora of the nasal passages, skin and mucous membrane
Morphological characteristics:
Gram positive usually in clusters; non-motile;
Specialized structure:
Capsule
BAM: medium to large colonies
most colonies are pigmented creamy yellow :
most colonies are beta hemolytic
MSA: yellow discoloration of medium (mannitol fermenters)
Diagnostic test:
catalase positive; coagulase positive
Staphylococcus aureus
Enterococcus faecalis
Group D streptococci
Morphological characteristics:
Gram positive cocci in short chain/ tetrads / sarcina /diplo / singles
Specialized structure:
Capsule
BAM: alpha hemolytic
Diagnostic tests: catalase (-)
