Swine/ruminant respiratory

Question 1

atrophic rhinitis in swine

Answer 1

• 3 week old to slaughter pigs
• sneezing, nasal discharge, poor growth, epistaxis
• lateral deviation of snout (atrophy of dorsal/ventral turbinates)
• nonprogressive: bordetella bronchiseptica
• progressive: pasteurella multocida

Question 2

prurulent (suppurative) bronchopneumonia in pigs

Answer 2

• very common in 3wk old to slaughter pigs
• dyspnea, retarded growth
• p multocida, bordetella bronchiseptica, haemophilus parasuis, streptococcus suis
• cranioventral lung consolidation
• neutrophils, macrophages

Question 3

fibrinonecrotic pleuropneumonia in pigs

Answer 3

• fibrinous bronchopneumonia
• 10wk old to slaughter pigs
• more severe than prurulent bronchopneumonia
• dyspnea, depression, fever, acute death
• actinobacillus pleuropneumoniae, suis
• caudal lobes especially affected - hemorrhage, necrosis, fibrinous pleuritis

Question 4

mycoplasma hyopneumoniae pneumonia

Answer 4

• enzootic pneumonia
• 10wk old to slaughter pigs
• cough, retarded growth
• often complicated with prurulent bronchopneumonia
• cilia of respiratory epithelium
• craniocentral lung consolidation

Question 5

porcine reproductive and respiratory syndrome (PRRS)

Answer 5

• reproductive disease in sows: abortions, piglets born weak
• respiratory disease in pigs of any age: depression, dyspnea
• complications: pneumonia, polyserositis, diarrhea
• lungs not collapsed –> rubbery, discolored
• infects alveolar macrophages –> interstitial pneumonia

Question 6

swine influenza virus

Answer 6

• any age affected
• acute onset of fever, cough, depression, nasal discharge
• cranioventral, mutifocal (“checkerboard”) areas of consolidation
• infects epithelial cells of trachea, bronchi, bronchioles, alveoli

Question 7

fibrinous polyserositis in pigs

Answer 7

• 3-15wk old
• fever, depression, dyspnea, reluctance to move, CNS signs, lameness
• bacteria from upper respiratory become systemic
• haemophilus parasuis (glasser’s), mycoplasma hyorhinis, streptococcus suis
• often secondary to PRRSV

Question 8

bovine prurulent bronchopneumonia

Answer 8

• bacteria: histophilus somni, p multocida, actinomyces pyogenes, e coli
• viruses: IBR, BRSV, influenza, BVDV

Question 9

shipping fever in cows

Answer 9

• fibrinous bronchopneumonia
• dyspnea, depression, fever, acute death
• 1-3 weeks after stress
• mannhemia haemolytica
• cranioventral bronchopneumonia, areas of hemorrhage/necrosis, fibrinous pleuritis

Question 10

infectious bovine rhinotracheitis

Answer 10

• bovine herpesvirus-1
• fever, dyspnea, nasal discharge
• severe form: necrosis of respiratory tract mucosa
• secondary bacterial pneumonia is frequent (bronchointerstitial pneumonia)

Question 11

bovine respiratory sincitial virus

Answer 11

• 1-3m old calves
• fever, dyspnea, cough, nasal discharge
• secondary bacterial pneumonia is frequent
• cranioventral: firm, dark, consolidated
• caudodorsal: heavy, wet, non-collapsed
• interstitial emphysema

Question 12

bovine tuberculosis

Answer 12

• mycobacterium bovis
• emaciation, decrease in milk production, cough, dyspnea, enlarged lymph noted
• granulomatous pneumonia and lymphadenitis

Question 13

ovine progressive pneumonia

Answer 13

• caused by a retrovirus (ovine lentivirus)
• similar to caprine arthritis encephalitis in goats
• subclinical disease/weight loss, progressive dyspnea
• replicates in macrophages only
• heavy, non-collapsed lungs
• interstial pneumonia