Streptococcus

Question 2

Morphology of Streptococcus

Answer 2

In pairs/chains

Question 3

Habitats of Streptococcus

Answer 3

Saprophytes in milk and Parasites in mucous membranes and intestines

Question 4

Classification of Streptococcus

Answer 4

Sherman and Lancefield

Question 5

This sherman classification is known to be a pathogenic species of Streptococcus

Answer 5

Pyogenic

Question 6

This sherman classification is known to produce alpha/green hemolysis

Answer 6

Viridans

Question 7

This sherman classification is known to be associated with milk

Answer 7

Lactic

Question 8

This sherman classification is known to affect the intestine

Answer 8

Enterococcus

Question 9

Carbohydrate or polysaccharide antigen found in cell wall/between the cell membrane

Answer 9

Teichoic Acid

Question 10

Virulence Factors of Streptococcus

Answer 10

1. Hyaluronic Acid
2. Protein M
3. Lipoteichoic Acid
4. Hemolysins

Question 11

What capsule interferes with phagocytosis

Answer 11

Hyaluronic Acid

Question 12

This type of protein is a specific immunity-inhibiting the phagocytosis immunotoxic effect on polymorphs and platelets

Answer 12

Protein M

Question 13

Hair-like fimbriae structures responsible for attachment

Answer 13

Lipoteichoic Acid

Question 14

This streptolysin is oxygen sensitive and elicits neutralizing antibodies

Answer 14

Streptolysin O

Question 15

This streptolysin is not sensitive to oxygen, is a peptide, and non antigenic

Answer 15

Streptolysin S

Question 16

This enzyme of streptococcus activate plasminogen that leads to digestion of fibrin clots

Answer 16

Streptokinase

Question 17

True or False,

Both Streptolysin O and Streptolysin S are toxic to neutrophils and macrophage

Answer 17

True

Question 18

This enzyme of streptococcus promotes the spread of infection in tissues

Answer 18

Hyaluronidase

Question 19

These toxins are low molecular weight proteins

Answer 19

Erythrogenic Toxin

Question 20

What group of Erythrogenic Toxin is responsible for rashes in scarlet fever

Answer 20

Group A

Question 21

These extracellular enzymes assists in production of substrates and reduces viscosity of fluid containing DNA

Answer 21

DNAses (A,B,C,D)

Question 22

Other name of DNAses (A,B,C,D)

Answer 22

Streptodornase

Question 23

What extracellular enzyme kills phagocytes that are produced by Group A streptococci

Answer 23

NADases (NAD = Nicotinamide Adenine Dinucleotide)

Question 24

This extracellular enzyme is a broad substrate produced by Group A streptococci

Answer 24

Proteinase

Question 25

This species of Streptococci is in long chains in secretions from infected udder. Grows brick red on solid medium containing Starch

Answer 25

S. agalactiae

Question 26

This species of Streptococcus causes severe and acute mastitis, Grouped in the Lancefield C, and often produce a distinct greenish discoloration

Answer 26

S. dysagalactiae

Question 27

This species of streptococcus is a normal commensal of the skin and Upper Respiratory Tract

Answer 27

S. zooepidemicus

Question 28

To what other species of Streptococcus is S. zooepidemicus related to

Answer 28

S. equi and S equisimilis

Question 29

True or False S. dysgalactiae produces hyaluronidase

Answer 29

True

Question 30

This species of Streptococcus is the common cause of suppurative arthritis in pigs causing lameness and necrosis of joints

Answer 30

S. equisimilis

Question 30

This species of Streptococcus causes acute but mild bovine mastitis and does not react with Lancefield grouping system

Answer 30

S. uberis

Question 31

This species of Streptococcus causes strangles; Long chains in exudates and fluid cultures; Outer surface of organism with peach fuzz-like coating of protein under electron microscope

Answer 31

S. equi

Question 32

This species of Streptococcus causes cervical lymphadenitis and swine strangles

Answer 32

S. porcinus

Question 33

What is the Lancefield classification of S. porcinus

Answer 33

Group E streptococci

Question 34

This species of Streptococcus causes meningitis and septicemia in young pigs

Answer 34

S. suis

Question 35

Which among the species of Streptococcus is said to be zoonotic

Answer 35

S. suis

Question 36

This species of Streptococcus affects mucous membranes of dogs and cats

Answer 36

S. canis

Question 37

This species of Streptococcus is abundant in feces of Horse

Answer 37

S. equinus

Question 38

Is S. equinus pathogenic or non-pathogenic

Answer 38

Non-pathogenic

Question 39

This species of Streptococcus is always present in milk and is known as a milk souring organism

Answer 39

S. lactis

Question 40

This species of Streptococcus is always present in mouth and intestinal tract of cattle

Answer 40

S. bovis