----- Original Message -----
From: "Bob Harrison" <[log in to unmask]>
I later confirm my field diagnosis with the microscope.
> If Peter is only looking for the blackened trachea then I agree. If he is
> seeing the actual tracheal mites then we have got a problem here.
Bob
Yes, I am looking for blackened trachaea as a positive indicator of acarine
infestation. Does anything else cause blackened trachaea (except smoking!)?
Peter Edwards
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