Table 1.

Canine distemper virus immunohistochemistry results for arctic foxes (Vulpes lagopus) with lipid pneumonia (n = 5) and without lipid pneumonia (n = 2).

Case	Lipid pneumonia	Lymphoid depletion	Lung	Lymph node	Spleen	Thymus	Urinary bladder	Kidney	Adipose tissue	Liver
1	No	No	–	NE	–	NE	NE	NE	–	–
2	Yes	No	+	NE	+	NE	+	NE	+	NE
3	Yes	No	+	+	+	NE	+	NE	NE	+
4	No*	No	–	+/–	–	NE	NE	NE	+/–	–
5	Yes	L, S, T	+	+	NE	+	NE	+	+	NE
6	Yes	L	+	+	+	+	+	NE	NE	+
7	Yes	L	+	+	+	NE	NE	NE	NE	NE

L = lymph node; NE = not examined; S = spleen; T = thymus; – = not stained; + = stained; +/– = suspect positive staining.

^*This Arctic fox had mild alveolar histiocytosis.