Unit 3- Mannheimia

Question 1

Mannhemia hemolytica

Answer 1

Grows poorly on MacConkey, weakly hemolytic, indole -, upper respiratory of cattle and sheep, bipolar stain

Question 2

M hemolytica Cattle

Answer 2

Primary cause of shipping fever and bacteremia

Question 3

M hemolytica Sheep

Answer 3

Bacteremia, pneumonia, bluebag mastitis

Question 4

Shipping Fever

Answer 4

M hemolytica main cause, requires stress or mycoplasma infection, RTX leukotoxin lyses bovine WBC

Question 5

Hemorrhagic Septicemia

Answer 5

Caused by T biotypes in nursing lambs

Question 6

Ovine Enzootic Pneumonia

Answer 6

A biotypes of M hemolytica

Question 7

T Biotype

Answer 7

Reclassified as Bibersteinia trehalosi

Question 8

Ovine Respiratory Disease

Answer 8

Similar to BRDC, lesions hemorrhagic with pleurisy and pericarditis

Question 9

Bluebag

Answer 9

Ovine mastitis, caused by B. trehalosi, transmitted by suckling lambs, leukotoxin causes necrosis and lack of bloodflow to udder

Question 10

Mannhemia Virulence Properties

Answer 10

Capsule, LPS, RTX leukotoxin specific to bovine WBC

Question 11

Mannheimia Compromising Factors

Answer 11

Stress, previous infection, inclement weather

Question 12

Mannhemia Immunity

Answer 12

Leukotoxin neutralizing antibodies, capsule and LPS antibodies