Handout 8 Flashcards
where are the majority of gram negative bacteria found?
in the gut???
most gram negative bacteria are rods except what 3?
Neisseria- diplococus “double douche”
and treponema and borrelia= spirochetes.
what do gram negative bacteria have in their cell walls?
LPS. It’s en ENDOTOXIN that is released when the bacteria lyse
is LPS an exotoxin or endotoxin?
ENDO- it’s part of the bacteria
what does the endotoxin react with that causes endotoxic shock?
macrophages
what are 3 organisms that pose the biggest danger for endotoxic shock?
Shigella, Neisseria, E. Coli
is LPS the same as bacterial exotoxins?
heck no
can exotoxins be released by gram -?
yes, gram neg and positive
ENDOTOXIN is all gram -
are antibodies to carbohydrate protective for endotoxins?
NO?
can endotoxins be converted to a toxoid?
NO! no vaccines! endotoxins can be converted though
would an endotoxin or exotoxin be more toxic in small amounts?
exotoxin
characteristics of the enterobacteriaceae family?
often intestinal flora and may cause GI disease
- becoming drug resistant0 problem with nosocomial disease
- virulence factors include endotoxin, capsule, and antigenic variation
ETEC?
enterotoxigenic E. Coli
EHEH
enterohemorrhagic E. Coli
salmonella typhimurium?
MURIUM- eggs and poultry “you like it so much why don’t you “MURY it???”
