Streptococcus pneumoniae strains, commonly called pneumococci, differ from other streptococci in that they contain complex polysaccharide capsules that consitute the major virulence determinant in the species. Pneumococci are respiratory pathogens that colonize upper airways and cause bronchitis or pneumonia after aspiration of respiratory secretions. (more…)
Of the several species of Haemophilus that are known, Haemophilus influenzae is the most prevalent pathogen. Several distinct capsu ...
Exotoxins are noxious proteins secreted by many bacteria. These toxins are often heat-labile and thus can be heat-inactivated f ...
Measles virus is a highly infectious viral disease characterized by a sore throat and a blotchy red rash that starts on the fac ...
Immunization is needed for person to be prevented of getting diseases, whereas in bigger scale, it is needed to eradicate the bre ...
The final stage of the disease process (although it may not be the final stage of the infection) is the actual production of di ...