Shared Flashcard Set

Details

Bacillus species
N/a
21
Microbiology
Undergraduate 3
04/20/2015

Additional Microbiology Flashcards

 


 

Cards

Term
B. anthracis causes
Definition
Anthrax
Term
B. cereus causes
Definition
Food poisoning
Term
B. subtilis causes
Definition
Eye infections
Term
What organism is usedB for QC of autoclave sterilization?
Definition
Bacillis sterothermophilus
Term
What organism is used for QC of oxide sterilization?
Definition
Bacillus subtilis
Term
General characteristics of Bacillus spp
Definition
Large gram positive "boxcar shaped" bacilli
Obligate aerobes or facultative anaerobes
Found in soil, dust, water.
Considered a lab contaminant
NF of skin
Species ID is not necessary for clinical purposes (besides anthracis)
Term
Bacillus anthracis
Definition
Disease of ruminants
Rarely seen in the US but endemic in Turkey, Iran and Pakistan
Term
How is Bacillus anthracis transmitted to humans?
Definition
Handling imported wool, goat hair and animal hides
Accidental inoculation (occupational hazard)
Self inoculation with animal vaccine in vet's office
Term
Forms of Anthrax include
Definition
Cutaneous
Pulmonintestinalary
Gastrointestinal
Term
Cutanous: Malignant pustule Anthrax
Definition
Most common form in the US
Organisms enter through skin abrasion and black eschar forms within 1-5 days. Slow healing and self-limiting but 80% heal spontaneously
Term
Pulmonary: Woolsorter's disease Anthrax
Definition
Spores are inhaled and then bacilli are found in large numbers in sputum.
80%-100% fatal
Term
Gastrointestinal Anthrax
Definition
Severe and rare form that results from swallowing the organism. Characterized by nausea, ab pain and vomiting. Can lead to septicemia and death. Organisms can be isolated from stool
Term
Athrax toxin consists of what 3 proteins?
Definition
Lethal factor (LF)
Edema factor (EF)
Protective antigen (PA)
Term
Protective antigen
Definition
A protein involved in Anthrax toxin that is necessary for toxin activity and the ability to enter host cells. It also suppresses neutrophil function which makes the host more susceptible
Term
Edema factor
Definition
Protein involved in Anthrax toxin that suppresses neutrophil function, making the host more susceptible
Term
Polysaccharide capsule
Definition
Associated with the proteins of Anthrax toxins. Resists phagocytosis
Term
What organism consists of large square ended-gram positive rods that occur in chains and look like bamboo? Also may have a capsule that surrounds virulent strains
Definition
Bacillus anthracis
Term
What organism has large, opaque, raised colonies with a curled margin that give a Medusa head appearance?
Definition
Bacillus anthracis
Term
Where does sporulation of Bacillus anthracis occur?
Definition
In soil or culture media, NOT in living tissue
Term
Bacillus cereus
Definition
May cause infections like septicemia and endocarditis in ICP's, also can cause severe eye infections, but more commonly causes food poisoning
Term
Bacillus cereus produces 2 types of toxins
Definition
Emetic toxin that is heat stable and causes vomitting (fried rice)
Enterotoxin that is heat labile and causes painful, watery diarrhea. (Poultry, cooked meats, mashed potatoes,s soups and desserts. Avoid toxin by refrigerating foods)
Supporting users have an ad free experience!