Pigs

Question 1

Porcine respiratory disease complex -pneumonia

Answer 1

Complicated by the immunosuppressive nature of some pathogens
- PRRS – also a primary / secondary cause of pneumonia
- SIV – also a primary / secondary cause of pneumonia
- PCV-2 – also a primary / secondary cause of pneumonia
- Mycoplasma hyopneumoniae – also a primary / secondary cause of pneumonia – previously thought of as a finisher disease but immunosuppression disease in weaner disease

Clinical signs
Coughing – low level common without pneumonia / requiring treatment
Anorexia
Lethargy
Losing body weight – can be sudden or may manifest as increasing variation over a period of time
Increased hair growth
Increased respiratory effort
Increased mortality
- Can be sudden acute deaths without clinical signs
- Can be due to increased number euthanized due to excessive body condition loss

ELISA - blood, oral fluids
PCR - blood, oral fluids, nasal and tonsillar swabs

PM
Histopathology
PCR - tissue, blood, BAL, swab
Culture - tissue, swab

Question 2

PRRS - porcine reproductive and respiratory syndrome

Answer 2

The primary vector for transmission of the virus is the infected pig and contaminated semen

Two distinct clinical phases: reproductive failure and postweaning respiratory diseases. The reproductive phase of the disease includes increases in the number of stillborn piglets, mummified fetuses, premature farrowings, and weak-born pigs.

Sow vaccine and youngstock vaccine