Chronic pneumonia in calves after experimental infection with Mycoplasma bovis strain 1067: Characterization of lung pathology, persistence of variable surface protein antigens and local immune response

Table 2 Histopathological lung lesions in calves inoculated with Mycoplasma bovis strain 1067 and in control calves

Calf No.	Bronchointerstitial pneumonia¹	Suppurative bronchitis and bronchiolitis	Suppurative bronchopneumonia	Caseonecrotic pneumonia	Obliterative Bronchiolitis	BALT hyperplaisia
1	+^a	+^a	+/++^d	-^c	-^c	++^b
2	+^a	+^a	+/++^d	-^c	-^c	++/+++^e
3	+^a	-^c	++/+++^e	++/+++^e	+++^f	++/+++^e
4	++^b	+^a	-^c	-^c	-^c	+++^f
5	+^a	+^a	+++^f	+++^f	+++^f	++/+++^e
6	+^a	+^a	-^c	-^c	-^c	+/++^d
7	+^a	+^a	-^c	-^c	-^c	+/++^d
8	+^a	-^c	++^b	-^c	++^b	++/+++^e
9	+^a	+^a	-^c	-^c	-^c	+/++^d
10	+^a	-^c	+^a	-^c	-^c	+/++^d
11	+^a	-^c	+^a	-^c	-^c	+/++^d
12	+^a	-^c	+^a	-^c	-^c	+/++^d

¹Infiltration of alveolar septa with macrophages, lymphocytes and neutrophilic granulocytes.
^aMild. ^bModerate. ^cNone. ^dMild to moderate. ^eModerate to severe. ^fSevere.

ISSN: 1751-0147