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;
43 Cards in this Set
- Front
- Back
|
when is the bacteria most responsive to antibiotics treatment ??
|
during the log phase
|
|
|
what is a selective medium and what is a deffeintial medium ??
|
Selective (s) : is a medium that contain special nutrients and antibiotics
Defferintial (D) : different bacteria can be distinguished by diff morphology or color |
|
|
which bacteria can grow on Maconcky agar ??
|
Enteric bacteria, Gram -ve, those that ferment lactose
|
|
|
BYCE is a differential medium for which bacteria ??
|
Legionella grows on Yeast extract agar CYE
|
|
|
N. meninigitidis and N. gonnarrhea will grow only on ??
|
chocolate agar (blood agar that been heated )
|
|
|
Vibrio cholera will grow on ?
|
alkaline growth medium TCBS, it will turn the medium orange
|
|
|
what does Mycoplasma require in order to grow ??
|
cholesterol and purines and pyrimidines
|
|
|
cystine is an essential molecule for growth of which bacteria ??
|
Francisella, Brucella, legionella, pasteurella
THE FOUR SISTERS ELLA IN THE CYSTIENE CHAPLE |
|
|
Haemophilus influenzae require what to grow ??
|
X(protoporphyrin) and V ( NAD)
|
|
|
what is an Obligated aerobe bacteria ?
|
requires oxygen and have no fermentative pathway (can't ferment glucose )
- TB -Mycobacterium -Psudonomans |
|
|
what is a facultative anarobe ??
|
bacteria that will require oxygen until it is depleted and then will ferment or respire anarobcally
- Most bacteria |
|
|
what are an obligated anarobe ??
|
1- lack superoxide dismutase
2- generally lack catalase 3- are fermenters 4- cannot use O2 as an electron acceptor - ABC bacteria - Actinomyces - Bacteroides - Clostridium |
|
|
Gram +ve stains ?/
|
purple
|
|
|
Gram -ve stains ??
|
pink
|
|
|
all cocci are ??
|
gram +ve except Nesseria, Maxilla and Veillonella
|
|
|
all spore formers are ??
|
Gram +ve
|
|
|
Acid fast organism will stain ??
|
red ( hot pink )
|
|
|
non acid fast organism will stain ??
|
blue
|
|
|
what is an example for acid fast and partial acid fast ??
|
Mycobacterium is acid fast while Nocardia is partially acid fast
|
|
|
what is the screening test for acid fast ??
|
Auramine Rhodamine Fluorescent stain
|
|
|
acid fast bacteria will stain ??
|
bright apple green on a black background
|
|
|
what are the gram +ve cocci ??
|
staphylcoccus or streptococcus
|
|
|
what are the gram +ve rods ??
|
Bacillus
Listeria corynebacterium clostridium |
|
|
what are the gram -ve cocci ??
|
Nessiria and maraxella
|
|
|
S. aureus looks like what on the blood agar ??
|
small and yellow colonies
|
|
|
where is the normal flora for S. aureus ??
|
nasal mucosa and skin
|
|
|
what is the mode of transmission of S.aureus ??
|
hands
sneezing surgical wounds contaminated food (potato salad) intervenous drug abuse chronic granulomatous diz tampons(toxic shock syndrome) |
|
|
what is the key determining factor between S. epidermidis and S. saprophyticus ?
|
S.epidermidis is a Novobiocin sensitive while S. saprophyticus is a Novobiocin resistant
|
|
|
what are the four bacterias which cause UTI ??
|
E. coli
S.saprophyticus K,pneumoniae P.vulgaris |
|
|
what is the pathogenisis for S.aureus ??
|
Protein A binds to Fc portion IgG and inhibits phagocytosis
|
|
|
what is the function of coagulase in S.aureus ??
|
converts fibrogen into fibrin clot
|
|
|
what is the function of alpha toxin in S. aureus ?
|
cytolytic toxin (alpha toxin) is a pore forming toxin
|
|
|
what is the function of Exfolatins ??
|
skin exfoliating toxins (involoved in scalded skin syndrome (SSS) and bullous Impetigo
|
|
|
what is the treatment of choice for S.aureus infection ??
|
Nafcillin/oxacillin
vanomycin |
|
|
what is the mode of Trans of Gonorrhea ??
|
direct contact thro sexual activity
|
|
|
what is the mode of Trans for dysentery ??
|
non direct contact : Fecal - Oral
|
|
|
what is the mode of Trans for conginital syphillius ??
|
transplacental :crosses the placenta
|
|
|
what is the mode of Trans of syphillius ??
|
blood borne: transfusion of blood or intervenous drug usage
|
|
|
what is the mode of trans of Tetanus ??
|
soil source : spores in the soil
|
|
|
what is the mode of trans of Legionair Diz ?
|
water source : bacteria in water aaersol that can be inhaled
|
|
|
what is the mode of trans of Lyme diz ??
|
bacteria enters in tic bites
|
|
|
what is the mode of trans of E. coli Hemolyticuremic syn ??
|
bacteria in cow shit ingested in uncooked burger
|
|
|
what is the mode of trans of staphylcoccus skin infection ??
|
fomite source: towel
|
