This photograph is from an ox, and is an easy one. It is an excellent portrayal of an important lesions. Note its color, texture, note intramuscular septa, and imagine what this might feel like and perhaps what it might smell like. It is obvious that this animal suffered an acute disease and was perhaps without the function of this muscle. It might have been lame, depending on where this muscle is from.
You have undoubtedly assumed that this is from a calf with blackleg, and that is
correct.
These photographs are from another ox that was not lame. The first shows colon and mesentery and lymph nodes. What do you see for a lesion in the mesentery? Do you think you have a perforated gut? Why not?
Look at the second photograph and see what the lesions are and then you should be able to make an etiologic diagnosis for this case
What is the etiologic agent of blackleg?
What is the pathogenesis of these lesions?
