T and B lymphocytes in the brains of dogs with concomitant seropositivity to three pathogenic protozoans: Leishmania chagasi, Toxoplasma gondii and Neospora caninum

Table 4 Histopathological alterations observed in the brains of the dogs, according to the experimental groups

Alteration¹	LTN group		L group		TN group		C group
	(n = 24)		(n = 31)		(n = 16)		(n = 10)
	n	%	n	%	n	%	n	%
Blood vessel walls hyalinization (choroid plexus)	3	12.5	9	29.0	1	6.3	3	30.0
Blood vessel walls hyalinization (leptomeninges)	4	16.7	4	12.9	1	6.3	1	10.0
Ependymal rosettes	2	8.3	2	6.5	-	-	-	-
Inflammatory lesions ²	18	75.0	17	54.8	10	62.5	-	-
Microhemorrhages	3	12.5	-	-	1	6.3	-	-
No alteration	6	25.0	7	22.6	5	31.3	6	60.0

¹One animal could have presented more than one alteration (n = 81).
²Inflammatory lesions, predominantly mononuclear cell infiltrates, at the choroid plexus, ependyma, leptomeninges and around parenchymal blood vessels (perivascular cuffs).

ISSN: 1756-0500