Widal test is carried out to test 

1. malaria

2. diabetes mellitus 

3. HIV/AIDS

4. typhoid fever

Enteric fever is caused by

1. Salmonella enteritidis

2. S. typhi

3. S. typhimurium

4. none of the above

Which of the following statements is correct?
A. Common cold - Droplet Infection.
B. Typhoid - Contaminated food & water.
C. AIDS - Shaking hands.
D. Ringworm - Using infected towels.
1. A and B
2. C and D
3. A and C
4. A, B and D

Which of the following pathogens is not transmitted by vector?
1. Salmonella typhi 
2. Alpha virus 
3. Plasmodium 
4. Wuchereria bancrofti

Typhoid fever is caused by a species of 

1. Streptococcus

2. Staphylococcus 

3. Salmonella

4. Mycobacterium