Micro Para [Practice Exam]

Front 1

CANNOT be cultivated on ARTIFICIAL CELL FREE media?

Back 1

M. leprae

Front 2

Lactose (-)

Citrate (-)

Urease (-)

Lysine decarboxylase (-)

Non motile

Back 2

S. dysenteriae

Front 3

Culture media such as Mueller-Hinton broth, trypticase soy agar with sheep blood or Todd-Hewitt broth will NOT support the growth of nutritionally variant streptococci (NVS) because they are deficient in?

Back 3

Thiol derivatives

Front 4

Exfoliation produced by Staphylococcus aureus is responsible for causing?

Back 4

Scalded Skin Syndrome (SSS)

Front 5

The predominant serotype of H. influenza implicated in meningeal infection is?

Back 5

Serotype B

Front 6

Strains of mycoplasma that produce very small colonies and require BOTH cholesterol and urea for growth are known as?

Back 6

T strain

Front 7

The bacitracin susceptibility test is used for the presumptive identification of?

Back 7

Group A streptococci

Front 8

Susceptibility to ethylhydrocupreine HCl is a presumptive test for the identification of?

Back 8

Streptococcus pneumonia

Front 9

Which of the following is the most potent exotoxin known?

Back 9

Botulinal toxin

Front 10

The concentration of calcium and magnesium ions in susceptibility testing medium is significant when testing the susceptibility of P. aeruginosa to?

Back 10

Gentamicin

Front 11

Sulfone dapsone is used for the treatment of?

Back 11

Leprosy

Front 12

Highly toxic substance required for the niacin test is?

Back 12

Cyanogen bromide

Front 13

Flagella staining technique most commonly used in clinical laboratories is?

Back 13

Leifson

Front 14

Which of the following would be negative using acid-fast stain?

Back 14

Actinomyces israelli

Front 15

The porphyrin test is most useful for the identification of which of the following?

Back 15

Haemophilus sp.

Front 16

Loeffler’s serum medium is recommended for the cultivation of?

Back 16

C. diphtheria

Front 17

Fecal cultures are inoculated on bismuth sulfate or brilliant green agars specifically for the isolation of?

Back 17

Salmonella spp.

Front 18

An isolate of E. coli recovered from the stool of a patient with severe bloody diarrhea should be tested for what sugar before sending to a reference laboratory for serotyping?

Back 18

Sorbitol

Front 19

In grouping Shigella organisms, agglutination by Group B antisera indicates that the species is?

Back 19

Shigella flexneri

Front 20

In addition to CO2 requirement and biochemical characteristics, Brucella melitensis and Brucella abortus are differentiated by growth on media containing which two dyes?

Back 20

Basic fuchsin and thionine

Front 21

Which Haemophilus sp. is difficult to isolate and recover from genital ulcers and swollen lymph nodes?

Back 21

H. ducreyi

Front 22

Micrococcus and Staphylococcus species are differentiated by which test?

Back 22

Fermentation of glucose (OF tube)

Front 23

A spherical, gram-positive coccus that is CATALASE (+), NONMOTILE and unable to reduce acid from glucose anaerobically is best identified as a member of the genus?

Back 23

Micrococcus

Front 24

Bacitracin A disks (0.05 units) are used for the presumptive identification of which group of beta-hemolytic Streptococcus spp?

Back 24

Group A

Front 25

The salt tolerance test (6.5% salt broth) is used presumptively to identify?

Back 25

Strep. agalactiae

Front 26

Plasma of choice for the coagulase test?

Back 26

Rabbit plasma

Front 27

The biphasic medium known as the Castaneda bottle is the preferred culture system for the cultivation of?

Back 27

Brucella suis

Front 28

The L-pyrolidnyl-B-naphtylamide (PYR) hydrolysis test is presumptive test for which streptococci?

Back 28

Group A and D (enterococcus) strep

Front 29

Alpha-hemolytic streptococci recovered from a wound were found to be penicillin resistant. Given the following results, what is the most likely identification?

Bile Esculin (+)

6.5% salt (+)

PYR (+)

Bile solubility - 0

SXT-R

Back 29

Enterococcus faecalist

Front 30

A gram positive coccus isolated from a blood culture has the following characteristics?

Optochin susceptibility (-)

Bacitracin (0.04 U) susceptibility (-)

Bile esculin hydrolysis (-)

Hippurate hydrolysis (+)

Catalase (-)

Back 30

Strep. agalactiae

Front 31

The superoxol test is used as a presumptive test for?

Back 31

N. gonorrhea

Front 32

A gram positive branching filamentous organism recovered from a sputum specimen as found to be positive with modified acid fast stain method. What is the most likely presumptive identification?

Back 32

Nocardia spp.

Front 33

A clinical problem has emerged concerning infections after prosthetic heart valve insertion or other cardiac procedures with methicillin-resistant strains of?

Back 33

S. epidermidis

Front 34

Only toxigenic strains of which serogroup are implicated in epidemic infections of Vibrio cholera?

Back 34

01

Front 35

Production of a yellow pigment is characteristic of which species of Enterobacter?

Back 35

E. sakazaki

Front 36

TWAR strains of Chlamydia are associated with which type of infection?

Back 36

Acute Respiratory Syndrome, Pneumonia

Front 37

Which of the following species of Bacillus is NON motile?

Back 37

B. anthracis

Front 38

The only NON motile pseudomonad?

Back 38

P. mallei

Front 39

The ability to grow in MacConkey is a characteristic of which species of mycobacteria?

Back 39

M. fortuitum

Front 40

An organism that has lost its ability to synthesize a peptidoglycan cell wall is known as?

Back 40

L form

Front 41

Strains of mycoplasma that produce very small colonies and require both cholesterol and urea for growth are known as?

Back 41

T strain

Front 42

Strains of mycoplasma that produce very small colonies and require both cholesterol and urea for growth are known as?

Back 42

T strain

Front 43

Important biochemical reactions of Bacillus anthracis, EXCEPT?

Back 43

Motile

Front 44

Antimicrobial susceptibility testing of anaerobes is done by which of the following methods?

Back 44

Microtube broth dilution

Front 45

Broad coenocytic hyphae found in tissue would be most typical of infection with?

Back 45

Rhizopus

Front 46

Nemathelminthes are commonly called?

Back 46

Round worms

Front 47

An important feature for the identification of Cryptococcus neoformans is the?

Back 47

Microscopic observation of capsule

Front 48

Which of the following is associated with small cigar shaped yeast cells at 37C and small, oval conidia arranged singly or as flowerettes?

Back 48

Sporothrix schenckii

Front 49

A bacteriophage is?

Back 49

A virus that attacks another virus

Front 50

Which of the following amoeba has a coarse peripheral chromatin and eccentric karyosomal chromatin?

Back 50

E. coli

Front 51

All of the following are correct match.

Back 51

Leishmania: sand fly

Plasmodium: anopheles mosquito

Trypanosoma cruzi: triatomid or kissing bugs

Front 52

Examination of CSF is valuable in the diagnosis of?

Back 52

African Trypanosomiasis

Front 53

Glossina species?

Back 53

Are known as the genus of Tsetse family

Front 54

Diphyllobothrium latum is the only non operculated tapeworm.

Schistosomes are the only operculated flukes.

Back 54

Both statements are FALSE

Front 55

Characteristics of E. coli trophozoite?

Back 55

Granular, junky cytoplasm

Nucleus with eccentric karyosomes