Survival, immune responses and tissue cyst production in outbred (Swiss white) and inbred (CBA/Ca) strains of mice experimentally infected with Neospora caninum tachyzoites.
The present work compared inbred (CBA/Ca) and outbred (Swiss white) strains of mice for their capacity to cope with a Neospora caninum infection and to consistently produce tissue cysts. In each experiment Swiss white and CBA/Ca mice were given three different doses of NC-1 tachyzoites. Lymphoproliferative and humoral responses as well as cytokine production were evaluated eight weeks after infection (PI) whereas tissue cyst production and histopathology were assessed 4, 6 and 10 weeks PI in immunosuppressed mice. Tissue cysts were observed 10 weeks after infection only in CBA/Ca mice receiving the two highest inoculum doses. Furthermore this strain showed the highest specific lymphoproliferative response. A mixed cytokine response with elevated IFN-gamma and fairly low IL-4 and IL-10 secretion was recorded. In both strains, no lesions were observed in the tissues of infected mice. This study indicates that CBA/Ca female mice infected with 5 x 10(6) NC-1 tachyzoites represent a useful model for the study of specific maternal immune responses in pregnant animals.
Rettigner
Chantal
C
Laboratory of Parasitology and Pathology of Parasitic Diseases, Department of Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, University of Liege, Boulevard de Colonster, 20, 4000 Liege, Belgium. Chantal.Rettinger@ulg.ac.be
Leclipteux
Thierry
T
De Meerschman
François
F
Focant
Charles
C
Losson
Bertrand
B
D000818:Animals; D000913:Antibodies, Protozoan / Q000276:immunology; D001921:Brain / Q000469:parasitology / Q000473:pathology; D003048:Coccidiosis / Q000469:parasitology / Q000662:veterinary*; D016207:Cytokines / Q000276:immunology; D004195:Disease Models, Animal; D005260:Female; D051379:Mice; D008808:Mice, Inbred CBA; D018688:Neospora / Q000276:immunology / Q000472:pathogenicity*; D012376:Rodent Diseases / Q000469:parasitology*
D000913:Antibodies, Protozoan; D016207:Cytokines