At the end of the post you can vote for the right diagnosis! 

In a 6 months old, hybrid pig carcass, the following lesion was observed in the lung:

Single caseous lesion, non encapsulated, in the lung parenchyma.

 

What is your diagnosis? (58)

%%RATING%%

The histopathological study shows that it is a focal area of  pulmonary parenchyma necrosis, it is a subacute lesion, since it was not encapsulated, we will not talk about pulmonary sequestration, which is a more chronic lesion. Microbiological culture allowed isolating grampositive, anaerobic bacteria with cocci and filamentous-bacilli  morphology, compatible with Actinomyces sp.. In this type of lesion the most likely differential would have been a pulmonary abscess caused by T.pyogenes. If you had chosen this option it wasn't that wrong in the end! 😉
Your answers are highlighted below.
Question 1
What is your diagnosis?
A
Pulmonary sequestration (Pasteurella multocida)
B
Pulmonary granuloma (Mycobacterium avium)
C
Pulmonary sequestration (Actinobacllus pleuropneumoniae)
D
Focal pulmonary necrosis (Actinomyces sp.)
E
Pulmonary abscess (Trueperella pyogenes)
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