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Microbiology

Microbiology
Which of the following(s) bacteria belong to the family Entero-bacteriaceae?

Salmonella
Yersinia
Shigella
All of these

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Microbiology
The application of Gamma rays destroys botulism toxin. The dose of gamma rays required for this purpose is

173 Rad
73 Rad
73 Gy
7.3 Mrad

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Microbiology
Which of the following disease is caused by Yersinia enterocolitica in man?

All of these
Gastroenteritis
Mesenteric lymphadenitis
Septicaemia

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Microbiology
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests?

Motility at 22°C
Decarboxylation of ornithine
Fermentation of sucrose and cellobiose
All of these

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Microbiology
Soft pickles are made so by pectolytic enzymes mostly from

moulds
bacteria
none of these
yeasts

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Microbiology
In Widal test the significant titres for H agglutinins is

1:400 or more
1:200 or more
1:50 or more
1:100 ormore

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