Enteric fever is caused by

1. Salmonella enteritidis

2. S. typhi

3. S. typhimurium

4. none of the above

Stem cells arise from

1. bone marrow

2. yolk sac

3. foetal liver

4. all the above.

Ingestion of food and water contaminated with infective eggs is the primary route of

infection for 

1. Taenia solium

2. Wuchereria bancrofti

3. Trichinella sp.

4. Ascaris lumbricoides

The degree of pathogenicity of a microorganism is referred to as 

1. virulence 

2. prevalence 

3. severity

4. pathogenic efficacy

The following hepatitis viruses are RNA except

1. hepatitis B virus

2. hepatitis A virus

3. hepatitis G virus

4. hepatitis E virus.

Cocaine is a stimulant, which may cause addiction. It is an alkaloid obtained from

1. Eucalyptus

2. Erythroxylum

3. Rauwolfia

4. Papaver

Which of the following is non-pathogenic bacteria of colon?

1. Escherichia coli

2. Balantidium coli

3. Entamoeba coli

4. Enterobius vermicularis

Which of the following is a component of cell mediated immunity?

1. B-cells

2. α-cells

3. T-cells

4. Both 1. and 2.

Which of the following is involved in allergic reaction ?

1. IgM

2. IgM and IgG

3. IgA

4. IgE

In Entamoeba histolytica, the presence of chromatid bodies is characteristic of

1. precystic stage

2. mature quadrinucleate stage

3. trophozoite stage

4. mature binucleate stage.