Correct Answer:- Option-D
Question58:-Vibrio cholera toxin acts by

A:-Glycosylate GTP binding protein

B:-Elevated intracellular cGMP

C:-ADP ribosylation of G protein

D:-Inhibition of cAMP

Correct Answer:- Option-C
Question59:-Twenty two year old male who was severely injured following a road traffic accident was brought to casualty.
He has completed the course of tetanus toxoid {TT} 10 years back. He should receive:

A:-TT 1 dose + HTIG
B:-TT 1 dose
C:-TT complete dose
D:-TT complete dose + HTIG
Correct Answer:- Option-A
Question60:-Preferred test to confirm H.pylori eradication is:
A:-Culture
B:-Urea breath கர்‌
C:-Rapid urease test
D:-Antibody detection
Correct Answer:- Option-B
Question61:-Colicin typing 15 done for:
A:-S.dysenteriae
B:-S.flexneri
C:-5.boydii
D:-S.sonnei
Correct Answer:- Option-D
Question62:-Screening for chronic carrier state following S.typhi infection is carried out by:
A:-Widal test
B:-Demonstrating Vi antigen
C:-Detection of Vi antibodies
D:-Nested PCR of serum sample
Correct Answer:- Option-C
Question63:-XDR TB is defined as:
A:-Resistance to isoniazid and rifampicin imrespective of resistance to any other drug
B:-Resistance to more than one drug other than co resistance to INH and rifampicin
C:-MDR TB that also is resistant to fluoroguinolones and at least one injectable second-line drugs
D:-MDR TB that is resistant to either one of the injectable second line drugs or flucroguinolones
Correct Answer:- Option-C
Question64:-Choose the comrect statement about the tests used for diagnosis of syphilis:
A:-RPR and USR tests do not require a microscope to detect flocculation
B:-In TPPA, tanned RBCs are coated with T.pallidum antigens
C:-TPHA fails to detect CSF antibodies
D:-Non treponemal tests are recommended to monitor treatment response
Correct Answer:- Option-D
Question65:-True about Leptospira interrogans:
A:-lt is a facultative anaerobe
B:-Semisolid Fletcher's medium is useful in cultivating this bacterium
C:-Levaditi staining is used to demonstrate L.interrogans
D:-Serovar specific PCR tests are available
Correct Answer:- Option-B
Question66:-Chlamydia trachomatis serotypes DK causes:
A:-Genital chlamydiasis
B:-Interstitial pneumonia
C:-Atherosclerosis
D:-Lymphogranuloma venereum
Correct Answer:- Option-A
Question67:-Choose the true statement regarding Mycoplasma pneumoniae:
A:-Obligate intracellular parasites
B:-Mycoplasmas are L forms