View source for Cytology Q&A 02

{{Template:Manson
|book = Cytology Q&A}}

[[Image:11.jpg|centre|500px]]

<br />

'''A ten-year-old spayed female barn cat presented with severe dyspnoea and cyanosis. Thoracocentesis yielded a foul-smelling, purulent, grey material. A smear of the material was made (Gram’s, ×100 oil).'''

<br />

<FlashCard questions="3">
|q1=What are the structures arrowed?
|a1=
There is a clump of filamentous gram-negative rods.
|l1=Gram Negative Bacteria - Overview
|q2=What are two organisms that have this kind of morphology?
|a2=
Actinomyces species and Nocardia species are bacterial genera that have this morphology. Of the two, Actinomyces is most likely in cases of pyothorax in the cat.
|l2=Actinomycetes Overview
|q3=How can you differentiate between the two before culture results can be received?
|a3=
An acid-fast stain (either Ziehl–Neelsen, or Kinyoun’s Cold Acid-Fast [an easy one to do in-house]) would differentiate the two species; Nocardia species are partially acid-fast, whilst Actinomyces are acid-fast negative.
|l3=Actinomycetes Overview
</FlashCard>

{{#tag:imagemap|Image:Next Question.png{{!}}center{{!}}200px
rect 0 0 860 850 [[Cytology Q&A 03|Cytology Q&A 03]]
desc none}}


[[Category:Cytology Q&A]]