What do beluga whales have to do pathology and microbiology? 

Whale, you can get a bartonella hensale infection if you get bit by one of these beauties! Also known as “cat scratch disease” … as you can probably tell, this is mostly seen in young kiddos playing with the family cat. It causes lymphadenitis (which you can stain for the organism) and lymph node necrosis / microabscesses. Basically, key words are cat scratch, axillary lymph node enlargement and tenderness with fever. But if someone says they were bitten by a beluga whale and you see the same histology of the lymph node, bartonella should enter your differential. 

Bartonella are gram negative bacilli and can be treated with doxycycline. 

The more you know. Beluga whale bite fever. 

http://www.jwildlifedis.org/content/44/4/871.full.pdf

http://www.webpathology.com/image.asp?case=386&n=1

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