N07-88 Visceral Laminosioptes cysticola in l k h a Palawan Peacock

N07-88
Visceral Laminosioptes cysticola in
a Palawan
l
Peacockk Pheasant
h
Sarah B. Chaney, B.A.
Contributors: Lisa Farina, DVM, Diplomate ACVP; Ellis Greiner, PhD
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SIGNALMENT
•Adult male Palawan peacock
pheasant (Polyplectron
(Polyplectron napoleonis)
napoleonis)
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History and Physical Exam
• Presentation:
P
t ti
•One week history of sitting on the ground in front of a heater
• Physical Exam:
•Weakness, depression, cachexia
•Blood
Blood Collection:
•Isoflurane anesthesia > decrease in blood pressure
•Cardiac and p
pulmonary
y arrest
•Cardiopulmonary resuscitation was unsuccessfully attempted
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Gross Lesions
•
General Body Condition:
•
•
Lungs:
•
•
•
Minimal visceral adipose stores
Diffusely mottled pink to red to dark red
Floated low in formalin
Left caudal thoracic air sac:
•
3x4x1 mm yellow plaque
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Histology
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Trachea and Esophagus
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Mites, 4x
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Mite, Cross section, 60x
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Mite in granuloma, 20x
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Granuloma with Chitin, 60x
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Lipid Depletion, 60x
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Morphologic Diagnoses
•
•
Moderate to severe, multifocal, chronic
granulomas with intralesional mites,
esophagus
h
and
d peri-tracheal
i t h l and
d perii
esophageal connective tissue.
Mild to moderate, multifocal lipid
depletion, adipose tissue.
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Additional Diagnoses
(Not in the slide set)
•
Moderate,
M
d t multifocal,
ltif
l subacute
b
t h
hemorrhage
h
with
ith
hemosiderosis and epithelial hyperplasia, lung.
•
Moderate, locally-extensive, chronic, heterophilic and
granulomatous airsacculitis with intralesional fungal
hyphae.
•
Moderate bilateral conjunctival nematode infestation
[Etiology: Oxyspirura sp.].
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Laminosioptes cysticola
•
•
•
Fowl cyst mite
Cosmopolitan parasite
Reported host range:
•
•
•
chickens, turkeys, pheasants, geese and pigeons
Low morbidity
Aesthetically unpleasing at slaughter
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Laminosioptes cysticola
•
Most common pathologic presentation:
•
•
•
Subcutaneous connective tissue infestation
Y ll
Yellow
tto white
hit nodules
d l th
thatt can mineralize
i
li upon
mite death
Histology:
s o ogy Minimal
a to
o no
o inflammatory
a
a o y reaction
eac o to
o
intact mites
• Granulomatous reaction with mite degeneration
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Subcutaneous Nodules:
Laminosioptes cysticola
Cassidy, DR, WE Ketter. The subcutaneous mite of chickens: An Incidence Report.
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Avian Diseases 9(1): 78-81, 1965
Laminosioptes cysticola
•
•
Infestations of thoracic and abdominal
viscera reported
One case report of infestation in an
emaciated wild turkey with severe
neurological signs
•
Abundant mites in brachial plexus and sciatic
nerves
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Discussion
•
Debilitation and loss of body condition may
have been due to visceral mite infestation
•
Id tifi d iin th
Identified
the meninges,
i
epicardium,
i di
connective
ti titissue
around vessels, lung, liver, crop, pectoral and femoral
skeletal muscle, periocular connective tissue, tracheal
connective tissue, esophagus, and skin.
•
Debilitation and poor body condition may have
made this animal unable to withstand
anesthesia
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Special thanks to
Dr. Lisa Farina and
Dr. Ellis Greiner
Acknowledgements:
Dr. William Castleman
Dr. Michael Dark
Questions???
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