Term
| What is the hallmark feature of bronchopneumonia? |
|
Definition
| -cranioventrial distribution |
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Term
| What causes caseonecrotic bronchopneumonia? |
|
Definition
-Mycoplasma infection (particularly M. bovis)
-commonly seen w/ infection by T. pyogenes folowing acute BRD. |
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Term
| What are the hallmark gross features of caseonecrotic bronchopneumonia? |
|
Definition
-cranioventral distributin & presence of nodular, necrotic foci w/ exudate
-also have sequestrum |
|
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Term
| What do you culture for dx of caseonecrotic bronchopneumonia? |
|
Definition
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Term
| What is aspiration penumonia? |
|
Definition
| -inhalaltion of foreign material |
|
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Term
| Describe an aspiration pneumonia due to inhalation of gastroesophageal contents. |
|
Definition
| -typically necrotziing in nature, but may be necrotizing and granulomatous |
|
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Term
| Describe equine aspiration pneumonia due to mineral oil. |
|
Definition
| -diffuse, interstitial pneumonia |
|
|
Term
| What are the hallmark gross features of aspiration pneumonia? |
|
Definition
| -hilar to cranioventral distribution, pulmonary necrosis (w/ hemorrhage), and presece of intralesional foreign material |
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Term
| True or False: Interstitial pneumonia is the most challenging pneumonia to diagnose at necropsy. |
|
Definition
|
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Term
| What is the target of interstitial pneumonia? |
|
Definition
| -endothelial-interstitial-epi (type I pneumocyte) interface |
|
|
Term
| How does the insult get to the lungs w/ interstitial pneumonia? |
|
Definition
| -endothelial (blood-bore) or epithelial (inhaled) |
|
|
Term
| What are the hallmark gross features of interstitial pneumonia? |
|
Definition
| -failure of lung to collapse, minimal to no exudate, diffuse to patchy distribution, and +/- rib impressions |
|
|
Term
| What are some causes of interstitial pneumonia? |
|
Definition
-septicemia/endotoxema (DIC)
-viral infections
ingested toxins: perilla mint, etc
-inhaled gases: oxygen, ammonia, smoke, etc
-massive trauma, strangulation, near drowning, lung injury |
|
|
Term
| What do we see on necropsy of interstitial pneumonia? |
|
Definition
| -rubbery to slightly firm texture and absence of specific pattern |
|
|
Term
| What are the common sequelae of interstitial pneumonia? |
|
Definition
-resolution
-acute death
-chronic pneumonia
-pulmonary fibrosis |
|
|
Term
| What is embolic penumonia? |
|
Definition
| -specific form of interstitial penumonia that arises from blood-borne, septic emboli |
|
|
Term
| What is the hallmark gross feature of embolic pneumonia? |
|
Definition
| -multifocal (multinodular) distribution |
|
|
Term
| What are the two primary processes of caudodorsal pneumonia? Examples of each? |
|
Definition
-direct larval migration of parasites: Metastrongylus/Dictyocaulus
-vascular insult (thromboembolic event): pulmonary thrombosis |
|
|
Term
| What is the hallmark gross feature of caudodorsal penumonia? |
|
Definition
| -caudodorsal distribution |
|
|
Term
| What is the most common cause of pulmonary thrombosis in cattle? |
|
Definition
| -RAV valvular endocarditis |
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