Reduce the number of micro-organisms to a level at which they are not harmful

Disinfection of living tissue- an application of an agent which inhibits the growth of microorganisms

Inhibits the growth of bacteria but doesn’t necessarily kill them

Kills bacteria-most don’t kill endospores

Kills spores

What the doctor should do before put a respiratory equipment on a patient ?

Time required to kill 90% of micro-organisms

Temperature change at D value required to reduce the micro-organisms population

Temperature below 100c

Temperature above 100c

Used to sterilize media

Kills microorganisms by coagulating their proteins

Kills by oxidation effects and denaturing proteins

To inactivate non sporing bacteria for preparation of vaccines also for sterilization of serum

Kills vegetative forms of bacterial pathogens - kills hiv and mycobacteria - doesn’t kill spores

these are characteristics of ?

For media containing sugar and gelatin

Sterilisation is carried out under pressure at 121c for 15 min

Advantage of autoclave

the lab physician applied Bowie dick tape to the article being autoclaved, pale brown stripes appear across the tape which indicates

Technique which using geobacillus SPORES in it

considered as hot air sterilisation

Ultraviolet rayes and infrared rayes are ..... , x-rays and gamma rayes are .....

It’s bactericidal, sporicidal and it kills spores

destroying anthrax spores in hair and wool

For postoperative skin disinfection

used as disinfectant in swimming pool

Marked bacteriostatic

Used as droplets in the eyes of newborn to protect against neisseria gonorrhoea

is Active against viruses ........,

used as fungicide .........

Used to prevent infection of burn tissues

bactericidal because the interaction with nucleic acids and used as antiseptic to treat mild burns

Active against gram positive bacteria and has no activity against tubercle bacilli

Bacteriostatic, intercalated between base pairs of DNA, form a fluorescent complex with DNA

ALL these characteristics belongs to

Not active against Gram-negative bacilli

Decomposes in light and broken down by catalase

Used for furmigation of operation theatre

Used for heat sensitive instruments, the materials must be well aerated after sterilization , it’s mutagenic and carcinogenic

Aearation is necessary in ..........

Aeration is NOT necessary in

Destroy natural gum rubber (latex)

Disposable-carcinogenic

If we want to prepare a solution for parenteral use , we should use

medium incubation

Transmitted by Airborne

Virus has very long incubation period with no symptoms.........,

virus remains completely latent with periodic reactivation...........,

Virus can be continuously detected: mild or no clinical symptoms ..........,

Mechanism of Cell damage and death can be arranged as

Playing the major role in clearing virus infection ..........,

protect against reinfection...........

Peak 7-10 days post infection and resolve ongoing virus infections

One of them causing a reduced response to an antigen, may be

due to genetic factors, pre-natal infection, molecular mimicry

Aggregates of stainable substances and usually consist of viral capsid proteins

after we did a gram stain for a patient it appears that he have a gram-positive red & spore forming bacteria, which of the following it could be

A small Gram-positive bacteria that doesn’t have spores and it looks like Chinese letters

The Elek’s test shows positive to toxigenicity to which bacteria?

A patient had fever and muscle pain and the gram staining shows bacteria with motility and tumbling movement

we did a gram staining and it shows that the bacteria is anaerobic which of the following it could be

Which of the following clostridium caused gangrene

Cause diphtheroids

Normal flora of female genital tract

A female, 18 years old ate a poorly cooked meats then she had a fever and diarrhea which of the following could be the responsible bacteria?

Which of the following is True about Listeria monocytogenes

Capsulated in vivo and forms spores in vitro also stained with acid fast spore stain

Tetaospasmin produced by

If there’s an infection of the umbilical mostly caused by

Sub-terminal endospores - performed toxin in the food and the toxin acts on voluntary and autonomic nervous system

Feeding of honey to the baby it’s a possible cause of

We use Lecithinase test and stormy clot formation to diagnose it

Associated with broad-spectrum antibiotic therapy, causing pseudomembranous colitis, its spores are major source of nasocomial outbreaks

A sample with gram + cocci and catalase (-) and beta hemolytic on blood agar also it’s bacitracin sensitive

Sample with gram + cocci bacteria and alpha hemolytic also sensitive to optochin test

A gram + cocci, catalase + , with Negative coagulase test

Protein A found in ?

Protein M found in?

One of the following is Catalase function

Cause urinary tract infection in sexually active young women

It’s a disease characterized by sore throat and an erythematous rash

Patient with sore throat and as complication he had arthritis and carditis, the reason could be

Gram+ cocci, encapsulated, diplococci .. All these characteristics belongs to

non-hemolytic, normal inhibitant of intestine , nosocomial infection, classified as group D streptococci

Which of the following wants to be sterile from micro organisms

Which of the following considers pathogens in normal flora of respiratory tract

Which of the following consider the most common cause of HAI

Which of the following is the major cause of HAI

Which of the following not usually used to prevent transmission of micro organisms spread by direct contact

When Placing a urinary catheter we should do

The doctor wants to take a blood sample from the patient, he should take it

The (best) site of CSF puncture

Clean catch Is the preferred method in

Used mainly for collection of urine from infants

Which bacteria produces vitamins B12 and K

40% of Neonatal meningitis caused by

Which of the following cause pediatric diarrhea

Causes dysentery which is similar to shigellosis

Cause infantile diarrhea

O157:H7 is the most common strain of

Produce verotoxin

Non-lactose fermenting colonies that cause typhoid and septicaemia

Oxidase negative, catalase positive

reduce nitrate to nitrite

A female 19 years old, went to the hospital because she had watery diarrhea with no blood, the doctor suspected that the cause was

Wich of the following tests used to detect typhoid fever

Which of the following Cause The 4F’s disease

The doctor looks at the agarand found swarming ureas positive non-lactose fermenter and very pleomorphic which could be

Characteristic odour, aerobic bacteria, positive oxidase, produce exopigment (pyocyanin) and it’s a common cause of nosocomial infections

Comma shaped, single flagellum, does a surface pellicle on alkaline peptone and cause a rise water stool

Helical shape,lophtrichous, associated with gastritis and cancers also produce VacA and CagA

Pathogen of animals, cause bubonic plague and pneumonic plague

How to do prophylaxis to cornyebacteria and titanus and bordetella?

They function as facultative intracellular parasites

Thayer Martin agar for the growth of which of the following

A lab physician took a look on a bacteria under microscope, he saw that it contains LOS and Opa which of the following could be this bacteria

Ratio between toxic does antibiotic does, or ratio of LD50 to ED50

Affect a variety of bacteria both gram-positive and gram-negative

Which of the following block the synthesis of peptidoglycan

Which of the following is an antibiotic that works on B-lactam

it’s the last step of peptidoglycan synthesis and used against penicillin-resistance stains

Inhibition of cell wall synthesis by inhibiting the early step of peptidoglycan synthesis

Bind to 30S ribosomal subunit

Gentamycin, streptomycin are

1-Rifampicin, 2-Quinolones and novobiocin, 3- Sulfonamides and Trimethoprim

If we add penicillin with tetracycline the result will be

حطي الصح السؤال تجريبي بس