Tag: neuraminidase

Virulence factors of Group-A Streptococcus

Streptococcus are gram positive, catalase negative cocci. Are spherical or ovoid, 0.5-1µ in diameter, arranged in chains, non-motile and non-sporing. They may become gram negative...

Important viruses and their properties

  Group Virus Characteristics Clinical importance Retroviruses Human T-cell leukaemia virus(HTLV-1)                       Human immune deficiency...