Micro Exam 3 Flashcards
What are the characterstics of proteobacteria?
gram negative, chemoheterotrophic,largest taxonomic group
biofilm
a microbial community that forms in layers on a surface
siderophores
proteins secreted by pathogens that bind more tightly to iron
toxins
poisonous substances produced by microorganisms
toxemia
Prescence of a toxin in the host blood.
intoxication
Prescence of toxin without microbial growth
toxigenicity
ability of an organism to produce a toxin.
exotoxin
produced inside of the cell and secreted out (Exo)
antitoxins(emergency treatment)
antibodies against specific toxins
toxoids
inactivated toxins used in vaccines.
superantigen(exotoxin)
produce an intense immune response due to release of cytokine cells
genotoxins(exotoxins
mutations in DNA
shock
life threatening decrease in blood pressure
ID 50
infectious dose for 50 percent of the population
LD 50
lethal dose for 50 percent of the population
adhesins and ligands?
bind to the receptor present on host cells
IGA proteases
destroy IGA antibodies
kinases
digest fibrin clots
collagenase
breaks down collagen
coagulase
coagulate fibroin
hylauranase
digest polysaccharides
systemic infection
infection throughout the whole body
focal infection
began as local infection and becomes systemic
local infection
limited to small area of body
sepsis
toxic imflamatory condition arising from spread of microbes from infection
toxemia
toxins in the blood
bacteremia
bacteria in the blood
What is e coli?
gram negative facultative anarobe rod shapped found in gut
What is e coli used for?
fecal indicator bacteria to indicate contamination
what causes typhoid fever ?
samanella typhi
What is enterobacteria
salmonella, e coli,
How many species of salmanella are there ?
2
What causes food poisoning
salmonella typhimurium
common sources of salmonella
undercooked chicken raw eggs
What is shigella enterobacteria
causes dysentery
Yersinia enterobacteria
causes plague
Serratia
red in color causes UTI found in saline
klebselia
in soil and water causes pnemonia
What is bdelivibrio
this is a delta proteobacteria
what does bdelivibrio
preys on cells and elongates to replicate
What is heliobacter
Epsilon proteobacteria causes H pylori infection found in stomanch
cambloyobacter
found in cattle or sheep
characteristics of epsilon protobacteria
helical and slender in shape
deinococus
bacteria that is highly reistant to radioadition
What is thermis aquatis
where TAQ polymrase for PCR comes from very stable
Where is thermos found in
hot springs extreme heat , yellowstone
streptococcus gram positive
strep throat
What are characteristics of mycoplasma
smallest free living organism and bacteria no cell wall
staphylococcus areus
gram positive grows in clusters responsible for MRSA
droplet transmission
transmission through the air less than 1 meter
indirect formite transmission
spread by nonliving item
airborne transmission
travels more than 1 meter
vehicle transmission
transmission from inanimate reservoir
vehicle transmission
air, water ,food or bodily fluid
incidence
number of new cases of a disease during a time period
prevalence
Old and new cases added together. The number of people who have something at any given time
prevalence
number of people who have disease