4: Cocci & Anaerobic Bacteria

• gram-positive

• cocci

• grows in clumps

• catalse-positive

Staphylococcus

• gram-positive

• cocci

• grows in clumps

• catalase-positive

Streptococcus

• gram-positive

• diplococci

• alpha-hemolytic

• surrounded by a capsule

S. pneumoniae

• gram-negative

• diplococci

Neisseria

which is the virulence factor of S. aureaus that binds to immunoglobulins?

lipid protein A

which is the structural virulence factor of Group B Streptococci that prevents phagocytosis?

capsule

what are the structural virulence factors of Group A Streptococci?

pili, M protein

what is the structural virulence factor of N. gonorrhoeae and N. meningitidis that helps with attachment?

pili

what is the reservoir for S. aureaus?

nose or skin of about 30% of people

what is the reservoir for Group B Streptococci?

genital tract of 25% of women

what is the mode of transmission for N. gonorrhoeae?

sexual or neonatal transmission

what is the reservoir for S. pneumoniae?

throat of 5-50% of people

what is the mode of transmission for N. meningitidis?

droplets

how are N. meningitidis and N. gonorrhoeae differentiated?

maltose fermentation

which bacteria is a minor cause of urinary tract infections, is coagulase negative, and non-hemolytic?

S. saprophyticus

which bacteria is a professional pathogen of the lower respiratory tract and always requires antibiotics?

N. gonorrhoeae

which group of streptococci are normal flora in the mouth and can cause dental caries and endocarditis?

Viridans streptococci