Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
What are the 2 common phenotypes of Staphylococci?
|
1.coagulase +
2. thermostable nuclease + (Staphylococcus Aureues) But not reliable, look for ENTEROTOXIN |
|
|
Ingestion of Staphylococcal enterotoxin are intoxication or infection?
|
intoxication >20ng
|
|
|
How many enterotoxins are identified?
|
13
A.B.C1.C.2.C3.D.E.G.H.I.J.K.L. NO F |
|
|
Mode of action of Staphylococcal enterotoxin
|
1. act as superantigen that mediates cross linkage between T cells receptor (CD4 T cells) and class II MHC (APC)
2.cross linkage stimulates massive inflammatory responses and releases cytokines such as IL2 |
|
|
Staphylococcal enterotoxin are made out of heat resistant protein.....
Which heat resistrance come first |
SEC>SEB>SEA
CBA |
|
|
Treament: Drink a lot of water to maitin fluid balance,rest
Which bacteria it refer to? |
Staphylococcal enterotoxin
|
|
|
Gram + , spore forming and aerobic rods is which Bacteria
|
Bacillus cereus
|
|
|
What are the 2 type of illness for Bacillus cereus gastroenteritis?
|
Diarrheal
and emetic |
|
|
Emetic syndrome is similar to which type of bacteria ?
|
Staphylococcal food poisoning
|
|
|
Diarrhea syndrome is similar to which type of bacteria
|
C. perfringens food poisoning
|
|
|
what is the key virulence factor for Bacillus cereus enterotoxins?
|
Hemolysin BL (HBL)
Hbl shows hemolysis, cytolysis, dermonecrosis, vascular permeability enterotoxic activity |
|
|
What kind of toxin is called cereulide,
short peptide with ring structure, heat stable, cause vomiting, RICE |
EMETIC TOXIN
Bacillus cereus |
|
|
What type of bacteria are gram positive ,spore forming and anaerobic rods
|
Clostridium Perfringer
|
|
|
What type of bacteria is highly fermentative and produce gases
|
Clostridium Perfringer
|
|
|
Which bacteria are classified into 5 groups based on toxins produced
|
Clostridium Perfringer
|
|
|
Describe Clostridium Perfringens enterotoxin (CPE) with 4 details
|
1.key virulence factor of type A
2.Synthesized during sporulation 3.Heat sensitive 4.Resistant to trypsin and chymotrypsin |
|
|
Mode of action of Clostridium Perfringer enterotoxin (CPE)
|
Bind to host receptor---> form large complex--->change membrane permeability---->death of host cells.
|
|
|
Which bacteria cell are sensitive to pH and are easily killed by the acidity in stomach
|
Clostridium Perfringer
|
|
|
Which bacteria is among the 3rd 4th foodborne disease in US
|
Clostridium Perfringer
|
|
|
All c.botulinum stairs produce........ which cause botulism
|
botulinum neurotoxin
C.botulinum |
|
|
Bacteria are classified based on their .......... and ............?
|
1.Toxin type
2. Physiological characteristic C.botulinum |
|
|
C.botulinum neurotoxin is the most toxic natural subtance know. It is also an ..... toxin?
|
A-B toxin
a:activity domain(light chain) b. binding domain ( heavy chain) |
|
|
which type of botulism in intoxication?
only 1 |
Food borne botulism
-consumption of toxin pre - formed in food |
|
|
Which 3 types to botulism is infection?
|
1.Infant botulism-growth of c.botu in GI
2.adult botulism-growth and production of toxin in adult intestine 3.wound botulism- grow and produce toxin in would like tetanus |
|
|
Which bacteria are the most resistant spores?
|
C.botulinum
|
|
|
which type of bacteris is gram positive and non spore forming rods??
|
Listeria monocytogenes
|
|
|
which bacteria cause the most number of recalls and hospitalization?
|
Listeria monocytogenes
|
|
|
Listeria monocytogenes are monitored by which 2 agency
|
Foodnet and pulse net
|
|
|
which bacteria attack immuno suppressed individuals, newborn and pregnant
|
Listeria monocytogenes
|
|
|
What are the 3 virulence factors for Listeria monocytogenes
|
1. internalin - binding and internalization
2.listeriolysin- has beta hemolytic activity and is a cytotoxin 3.ActA triggers host actin polymerization |
|
|
HowListeria monocytogenes spreads from cell to cell
|
1.L. mon triggers actin rearrangement in host cell
2. form a tail of actin polymers 3.The actin tails push the bacterial cells through host cells |
