AIRBORNE BORDETELLA-BRONCHISEPTICA STRAINS FROM PIGSTIES FOR EXPERIMENTAL INTRANASAL INFECTION OF PIGLETS

Infection experiments were applied to low-germ piglets and SPF pigs fo r virulence testing of B. bronchiseptica strains isolated from indoor atmosphere of pigeries. Pathologic-anatomic pneumonia-related alterati ons and rhinitis were recorded from six out of seven low-germ piglets. Atrophy of the nasal conchae was additionally exhibited by two animal s only. Rhinitis and moderate atrophy of nasal conchae were positively detected by pathologic-anatomic examinations of the infected SPF pigl ets. Interstitial pneumonia, peribronchitis and bronchiolitis were his tologically recordable from the lungs. The investigations reported in this paper provided evidence to the effect that airborn B. bronchisept ica strains isolated from livestock houses, following nasal infection, were capable of colonisation on nasal mucosa in piglets at different age levels and were also capable of penetration of the organism to cau se pathologic-anatomic alterations of differentiated severity of nose and lung.