Characteristics of common bacterial pathogens of cattle

Question 1

Actinobacillus

Answer 1

• Extracellular
• Gram negative
• Facultative anaerobe

Question 2

Campylobacter

Answer 2

• Extracellular
• Gram negative
• Aerobe

Question 3

Clostridia

Answer 3

• Extracellular
• Gram positive
• Anaerobic

Question 4

Trueperella

Answer 4

• Facultative intracellular
• Gram positive
• Facultative anaerobe

Question 5

E. coli

Answer 5

• Extracellular
• Gram negative
• Facultative anaerobe

Question 6

Fusobacterium

Answer 6

• Extracellular
• Gram negative
• Anaerobic

Question 7

Histophilus

Answer 7

• Extracellular
• Gram negative
• Facultative anaerobe

Question 8

Klebsiella

Answer 8

• Extracellular
• Gram negative
• Facultative anaerobe

Question 9

Leptospira

Answer 9

• Extracellular
• Aerobic

Question 10

Mycobacterium

Answer 10

• Facultative intracellular
• Acid fast
• Aerobic

Question 11

Mycoplasma

Answer 11

• Attached to cell membrane (often considered intracellular)
  *

Question 12

Pasteurella

Answer 12

• Extracellular
• Gram negative
• Facultative anaerobe

Question 13

Mannheimia

Answer 13

• Extracellular
• Gram negative
• Facultative anaerobe

Question 14

Salmonella

Answer 14

• Facultative intracellular or extracellular
• Gram negative
• Facultative anaerobe

Question 15

Staphylococcus

Answer 15

• Extracellular or facultative intracellular
• Gram positive
• Facultative anaerobe

Question 16

Streptococcus

Answer 16

• Extracellular
• Gram positive
• Facultative anaerobe

Question 17

Bacteria associated with pneumonia in cattle (and gram +ve/-ve)

Answer 17

Pneumonia
* Mycoplasma bovis (+ve)
* Mannheimia haemolytica (-ve)
* Pasteurella multocida (-ve)
* Histophilus somnus (-ve)

Question 18

Bacteria associated with liver abscesses (and gram +ve/-ve)

Answer 18

Liver abscesses
* Trueperella pyogenes (+ve)
* Staph aureus (+ve)
* Strep spp (+ve)
* F. necrophorum (-ve)

Question 19

Bacteria associated with metritis (and gram +ve/-ve)

Answer 19

Metritis
* T. pyogenes (+ve)
* Staph aureus (+ve)
* Strep spp. (+ve)
* Clostridium (+ve)
* F. necrophorum (-ve)
* E. coli (-ve)
* Pseudomonas (-ve)
* Proteus (-ve)

Question 20

Bacteria associated with urinary tract infection (and gram +ve/-ve)

Answer 20

UTI
* Corynebacterium renale (+ve)
* E. coli (-ve)

Question 21

Bacteria associated with diarrhoea in adult cattle (and gram +ve/-ve)

Answer 21

Diarrhoea (adults)
* Mycobacterium paratuberculosis (+ve)
* Salmonella typhimurium/ S. Dublin (-ve)

Question 22

Bacteria associated with mastitis (and gram+ve/-ve)

Answer 22

Mastitis
* Staph aureus (+ve)
* Strep uberis (+ve)
* E.coli (-ve)

Question 23

Bacteria associated with meningitis in calves (and gram +ve/-ve)

Answer 23

Meningitis (calves)
* Staph aureus (+ve)
* Strep spp. (+ve)
* Haemophilus somnus (-ve)
* E. coli (-ve)

Question 24

Bacteria associated with calf diphtheria (and gram +ve/-ve)

Answer 24

Calf diphtheria
* F. necrophorum (-ve)

Question 25

Bacteria associated with joint ill (and gram +ve/-ve)

Answer 25

Joint ill
* A. pyogenes (+ve)
* S. aureus (+ve)
* Strep spp. (+ve)
* E. coli (-ve)
* Salmonella (-ve)

Question 26

Bacteria associated with diarrhoea in calves (and gram +ve/-ve)

Answer 26

Diarrhoea (calves)
* E. coli (-ve)
* S. tymphimurium/ S. dublin (-ve)

Question 27

Bacteria associated with navel ill (and gram +ve/-ve)

Answer 27

Navel ill
* A. pyogenes (+ve)