Excerise 11 bacterial pathogens lactic acid bacteria

Lactobacillus, enterococcus, lactococcus, streptococcus

positive

Non-sporeforming cocci, short rods or rods

Can be grown at normal atmospheric oxygen strength

Unlike most anaerobes they possess superoxide dismutase and peroxidase as alternative enzymes to detoxify peroxide radicals

Primarily to lactic acid

Have virulence factors to infect and cause disease and when introduced to body parts they find a chance to invade

Structures or molecules that increase an organisms pathogenicity or disease causing ability

Cocci arranged in chains
Many part of normal flora

Not a part of normal flora
Causes disease such as strep throat pneumonia Otis media and meningitis

They can't respire and do not produce catalase

Form pairs of cocci

Common commensal organisms in intestines of humans and are tolerant of a wide range of environmental conditions like extreme temp, pH and high salt concentrations

Wide variety of VFs
Transiently colonized mouth nose and throats
Skin infections, sinus and ear infections, strep throat, pneumonia

Adhesions for collagen, hemolysins, leucocidin, streptokinase, capsule, M protein

Invasins

Found in intestines, female genital tract and mouth
Infections are usually nosocomial and include UITs wound infections and dental infections
Very easily spread via toilet seats towels hands
VFs include hemolysin and adhesions for human tissue
Antibiotic resistance very common

vancomycin resistant enterococcus