virulence

Differences between Salk type (IPV) and Sabin type (OPV) vaccine

by

The differences between Salk and Sabin type vaccine are as follows: S.N Salk type (IPV) S.N Sabin type (OPV) 1. Stands for inactivated polio vaccine. 1. Stands for oral polio vaccine. 2. Virus used is killed and formalized. 2. Virus used is live and attenuated. 3. Administered subcutaneously or intra muscularly. 3. Administered orally. 4. … Read more

Virulence factors of Group-A Streptococcus

by

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 in ageing culture when the bacteria die. Some of the strains possess capsules made up of hyaluronic acid while some of the strains possess capsules composed of polysaccharide. Human beings … Read more