GRAM (+) & (-) ANAEROBIC COCCI & BACILLI

Peptococcus

Anaerobic cocci that appears in cluster (Anaerobic staphylococcus)

GRAM + ANAEROBIC COCCI

They thrive in tissues, abscesses, and mucosal areas where amino acids, peptides, and proteins are abundant

protein

“Pepto” means

Peptococcus niger

Staphylococcus-like, but does not give golden colored colonies. They give black pigmented colonies

PEPTOSTREPTOCOCCUS

Anaerobic Streptococcus; catalase Negative, appears in chains

Peptostreptococcus anaerobius

Causes periodontitis, peritonsillar abscess and abdominal abscess; Sweet, putrid odor

SPS

Peptostreptococcus anaerobius is inhibited by __________

VEILONELLA

Fluoresce red on UV light and are Gram negative cocci in pairs, chains, and irregular clumps

MEGASPHERA

Associated with High-risk HPV infections

NEGATIVICOCCUS

Seen in ground glass nodules associated with lung adenocarcinoma

C. difficile

Clostridium that inhabits the GIT

calcium dipicolinate

spores made from ______ that increases virulence and infectivity

C. perfringens

Causes gas gangrene and myonecrosis

C. tetani

Tetanus, lockjaw, spastic paralysis, tetanus neonatorum, Opisthotonus, risus sardonicus

C. botulinum

Floppy baby syndrome

C. difficile

Antibiotic-associated pseudomembranous colitis

C. septicum

Neutropenic enterocolitis, Marker for Malignancy in GI tract

C. ramosum

Intra-abdominal infections following trauma

ACTINOMYCES

Fungus-like bacteria; branching and Filamentous

A. bovis

Lumpy jaw in cattle

A. israelii

Pelvic actinomycoses with “sulfur granules” seen in the exudate of the infection.

BIFIDOBACTERIUM

Highly pleomorphic rods with BIFID ends; resembles bone-shaped dog biscuits

Lactobacillus

organism that maintains homeostasis by producing large quantities of lactic acid.

L. acidophilus

A.k.a Doderlain bacillus; High during pregnancy, Inhibits G. vaginalis and promotes C. albicans

PROPIONIBACTERIUM

Produces propionic acid from glucose

P. acnes

Often found as skin contaminant in blood cultures; Chinese letter morphology

GRAM - ANAEROBIC BACILLI

Major normal flora in the colon and oral cavity

B. fragilis

Predominant bacteria of the GIT- Has greater concentration in GIT than E. coli

Black

color of B.fragilis in BBE agar

VCK

B. fragilis is resistant to ___

rifampin

B. fragilis is susceptible to _____

FUSOBACTERIUM

Appear as long, thin, filamentous with tapered ends

F. nucleatum

Predominant in oral cavity; Bread crumb colonies with Rancid Butter odor

F. necrophorum

Vincent’s angina and Lemierre’s disease. 

F. necrophorum

Opalescent colonies with speckles on stereoscope; Positive for Chartreuse fluorescence

PREVOTELLA

Brick-red Fluorescence; Saccharolytic, Vancomycin Resistant

PORPHYROMONAS

Dark brown, pigmented colonies from heme accumulation

PORPHYROMONAS

They metabolize hemoglobin

P. assacharolytica

Brick-red Fluorescence; Assacharolytic, Vancomycin Sensitive