Streptococcus Flashcards
Streptococcus are gram _____ bacteria
Positive
What is the motility of Streptococcus?
Non motile
Are Streptococcus capsulated or not?
Capsulated
What is the oxygen requirement of Streptococcus?
Facultative anaerobes
What is the catalase test result of Streptococcus?
Catalase negative
What Streptococcus group is classified using the Lancefield classification?
Beta-hemolytic Streptococci
What substance is used in Lancefield classification?
C carbohydrate antigen
What is the appearance of Streptococcus under the microscope?
Spherical cocci in chains or pairs
Streptococcus needs what typee of nutrient requirements?
They need enrichment with blood and serum.
Streptococcus grows well in?
Milk, produces lactic acid
In Sherman Classification These are Streptococcus Pathogenic species that produce pus.
Pyogenic
In Sherman Classification These are Streptococcus sp. that are Alpha/green hemolysis on blood agar.
Viridans
In Sherman Classification These are Streptococcus sp. that are associate with milk
Lactic Group
In Sherman Classification These are Streptococcus sp. affecting the intestine.
Enterococcus
Carbohydrate or polysaccharide antigen is found in?
he cell wall or between the cell wall and membrane (teichoic acid)
What virulence of Streptococcus interferes with phagocytosis
Hyaluronic acid
Responsible for virulence; inhibits phagocytosis and has immunotoxic effects on polymorphs and platelets. [inhibits opsonization]
Protein M
What toxins are responsible for beta hemolysis in Streptococcus?
Streptolysins O and S.
What is a good indicator of present or past Streptococcus infection?
Antibodies to Streptolysin O.
What cells are toxic targets of Streptolysins O and S?
Neutrophils and macrophages.
Toxin which is a protein and elicits neutralizing antibodies
Streptolysin O
Toxin which is a peptide and non-antigenic.
Streptolysin S
What Causes rashes in scarlet fever. Group A Streptococcus?
erythrogenic toxin
Who Promotes the spread of infection in tissues of Streptococcus?
Hyaluronidase
What does NADase do in Group A Streptococcus
Kills phagocytes.
Has broad substrate specificity n Group A Streptococcus?
proteinase
What species of Streptococcus is found in infected udder
Streptococcus agalactiae
Streptococcus agalactiae on solid medium containing starch shows what color?
Brick red growth
What test is used to identify Streptococcus agalactiae
CAMP test
CAMP test means
Christie, Atkins, Munch-Petersen
What causes Acute, severe mastitis
Streptococcus dysagalactiae
Lancefield group C.
Streptococcus dysagalactiae
Often produces a distinct greenish discoloration.
Streptococcus dysagalactiae
Normal commensal of the skin and upper respiratory tract, tonsils and lymphoid tissues of the horse.
Streptococcus zooepidemicus
Most common cause of wound infection in horses.
Streptococcus zooepidemicus
Secondary invader of viral infections of URT of foals and young horses.
Streptococcus zooepidemicus
Responsible for Bovine Mastitis
Streptococcus uberis
Closely related to S. zooepidemicus.
Streptococcus equisimilis
Most common cause of suppurative arthritis in pigs
Streptococcus equisimilis
Responsible for Tonsillar tissues and draining lymph nodes.
Streptococcus equisimilis
Causes strangles in horses
Streptococcus equi
Outer surface of organism with peach fuzz-like coating of protein under electron microscope.
Streptococcus equi
Oxygen-sensitive streptolysin O-like hemolysin produces wide zone of
B-hemolysis
Obligate parasite of family Equidae.
Streptococcus equi
formation of abscesses in thorax and abdomen caused by Streptococcus equi
Bastard strangles
