Rhodoccocus equi

Question 1

pathogenesis

Answer 1

opportunistic pathogen
intracellular pathogen
inhabitant of soil and GI tract
culture on blood and MacCOnkey agar

Question 2

major disease

Answer 2

suppurative bronchopneumonia of foals

Question 3

gram

Answer 3

positive

Question 4

shape

Answer 4

rod or cocci

Question 5

media for growth

Answer 5

non enriched

Question 6

colonies

Answer 6

salmon pink
mucoid
non hemolytic

Question 7

respiration

Answer 7

aerobic

Question 8

motility

Answer 8

non motile

Question 9

CAMP

Answer 9

positive

Question 10

soil saphrophyte?

Answer 10

yes

Question 11

clinical conditions in foals 1-4 months

Answer 11

suppurative bronchopneumonia
pulmonary abscessations

Question 12

clinical conditions of horses

Answer 12

superficial abscessation

Question 13

clinical conditions of pigs and cattle

Answer 13

mild cervical lymphadenopathy

Question 14

clinical conditions of cats

Answer 14

subcutaneous abscesses
mediastinal granulomas

Question 15

clinical conditions of immunosuppressed humans

Answer 15

pneumonia

Question 16

CAMP test

Answer 16

-R equi produces factor that completely lyses RBC previously damaged by B hemolysis of S aureus
-produces spade shaped pattern of complete hemolysis that extends across streak of S aureus

Question 17

clinical signs

Answer 17

-fever
-anorexia
-bronchopneumonia – cough, dyspnea, weight loss, exercise intolerance, loud moist rales on lung auscultation

Question 18

diagnosis

Answer 18

history of disease in farm
leukocytosis
ultrasound of thorax

Question 19

treatment

Answer 19

rifampin
erythromycin