Pneumococcal vaccines are vaccines against the bacterium "Streptococcus pneumoniae". Rheumatic fever may occur following an infection of the throat by the bacterium "Streptococcus pyogenes". Antimicrobial peptides such as histatins inhibit the growth of Candida albicans and Streptococcus mutans. Streptococcus pyogenes is a species of Gram-positive, aerotolerant bacterium in the genus "Streptococcus". Some infections can be prevented by vaccination against pathogens such as influenza and "Streptococcus pneumoniae". "Bordetella pertussis", "Staphylococcus" and "Streptococcus" bacteria. Streptococcal pharyngitis or strep throat is caused by a group A beta-hemolytic streptococcus (GAS). Pneumonia caused by "Streptococcus pneumoniae" is associated with rusty colored sputum. Another reason appears to be a lessening of the virulence or invasiveness of Streptococcus pyogenes. Extensive use of azithromycin has resulted in growing Streptococcus pneumoniae resistance. Common gram-positive bacteria identified include species of "Streptococcus", "Staphylococcus", and "Enterococcus". Bronchopneumonia is less likely than lobar pneumonia to be associated with "Streptococcus pneumoniae". He suffered from coinfection with influenza and "Streptococcus pneumoniae". In addition, many bacteria grow in chains (e.g. "Streptococcus") or clumps (e.g., "Staphylococcus"). "Staphylococcus" is different from the similarly named and medically relevant genus "Streptococcus".