In Widal test the significant titres for H agglutinins is

  1. Cell wall protein of Streptococcus pyogenes crossreacts with human

    A. synovial fluid
    B. cardiac valves
    C. myocardium
    D. vascular intima
    [#]

  2. In Widal test the significant titres for H agglutinins is

    A. 1:50 or more
    B. 1:100 ormore
    C. 1:200 or more
    D. 1:400 or more
    [#]

  3. Salmonellae can also be killed by

    A. pasteurisation
    B. chlorination
    C. boiling
    D. all of these
    [#]

  4. Traveller’s diarrhea is caused by

    A. enteropathogenic Escherichia coli (EPEC)
    B. entero invasive E. coli (EIEC)
    C. entero toxigenic E. coli (ETEC)
    D. entero haemorrhagic E. coli (EHEC)