micro - gram pos bacilli (spore forming rods)

spore

first characteristic to note on a regular shaped GPR is the presence or absence of a _____

bacillus

species and/or their spores found in environment, can be contaminants or pathogens, culture test may only need to be performed to rule out B. anthracis

bacillus

facultative anaerobes, grow rapidly, large GPR, can be gram variable, spore formation encouraged by inoculating the colony onto urea or bile esculin slants

malachite green

spore visualization of bacillus can be enhanced through _____ with safranin counterstain; spores appear as green ovals within the pink cell

bacillus anthracis

appears encapsulated in CSF and blood smears

bacillus anthracis

non hemolytic, non motile, does not grown on PEA, lecithinase pos, mannitol salt agar does not produce growth, zone of inhibition with penicillin

bacillus anthracis

GPR that resembles bamboo plants, may be absent in autopsy specimens, encapsulated and observed in blood or CSF is significant

bacillus anthracis

spores are only formed in ambient air, they are oval when observed in colony smears, central to subterminal spores that do not cause the cell to appear swollen

bacillus anthracis

SBA growth shows large flat colonies, medusa head look, stands up when teased with a loop

bacillus anthracis

no growth on PEA, nonfermenting on MSA, lecithinase pos, penicillin susceptible

bacillus anthracis

cutaneous anthrax and inhalation anthrax occur as result of handling products contaminated with this, can cause gastrointestinal anthrax from contaminated meat

eschars

bacillus anthracis shows black necrotic lesions referred to as _____

bacillus anthracis

germination of spores product vegetative cells, germinate in alveolar macrophages, bacteria multiply and product lethal toxin and edema toxin

bacillus anthracis

two virulence plasmids encode for a capsule and exotoxin, both toxins are required for full virulence

bacillus cereus

isolation from an eye culture is a critical result and neonates may be vulnerable

bacillus cereus

grows on PEA, hemolytic, catalase pos, motile, resistant to penicillin, lecithinase pos

bacillus cereus

associated with gastrointestinal infections, local infections, and systemic infections

bacillus cereus

spores are present in the environment, infections are due to trauma or contamination, exotoxins are hemolysins, proteases, and more

bacillus cereus

sporadic food poisoning (rice, chicken, cheese, meat, etc), spores contaminate food when conditions are favorable

bacillus cereus

can cause two syndromes: diarrheal or emetic which are both self limiting; there is a new strain with capsule and toxin similar to B. anthracis

other bacillus

large wrinkled colonies, contaminants in immunocompromised, food poisoning, rare systemic or wound and eye infections, pseudoinfections