PASTEURELLA Flashcards
GENERAL CHARACTERISTICS:
• GN pleomorphic coccobacilli, nonmotile
• Frequent bipolar staining appearance
Pasteurella
(safety pin - when poles of the cells are more intensely stained)
Pasteurella
oxidase+
catalase+
nitrate reduction+
indole+
ODC+
ferment glucose with weak to moderate acid production without gas
Pasteurella
• Facultative anaerobes that grow on SBA & CHOC, producing nonhemolytic, convex, smooth or mucoid, grayish colonies with musty or mushroom odor, 37C for 24h, narrow green-to-brown halo around colonies after 48h
Pasteurella
MUSTY MUSHROOM ODOR
Pasteurella
Pasteurella do not grow on
MAC
Oral cavities of healthy domestic dogs, cats, and other animals (swine, horses, cattle)
P. multocida
Most common isolate from human specimens;
most infections are associated with dog and cat bites and scratches;
can cause respiratory tract infections, including lung abscesses, pneumonia, empyema, and tonsillitis; usually underlying disease present or immune complications; differentiated by acid production from dulcitol and sorbitol; rare clinical isolates, primarily of veterinary interest
P. multocida
Human infections acquired mostly through dog and cat bites
P. pneumotropica
Respiratory tract of
dogs, cats, and some rodents
P. pneumotropica
Respiratory tracts of dogs and cats
P. dagmatis
Human infections caused by bites and scratches of dogs and cats
P. dagmatis
Caused by bites
P. stomatis
Oropharyngeal biota
of dogs and cats
P. stomatis
Biotype I is found in the oral cavity of dogs
P. canis
