Immune response of mice infested by Hyalomma dromedarii ticks infected with entomopathogenic nematodes.
In the present work, the total leucocytes count of infested mice with ticks Hyalomma dromedarii infected with nematodes showed significant increase than infested group with ticks only. The infested group of mice with ticks and infested mice with ticks and nematodes showed a markedly significant drop in the erythrocytes count. The results showed a highly significant decrease in Hb concentration, and HCT percentage for mice infested with ticks and a marked increase with ticks infected with nematodes. The results showed a significant decrease in level of IgG of mice infested with ticks, while in infested mice with ticks and nematodes, the IgG level increased to control level which might indicated that nematodes penetrate ticks that were feeding on mice through the thinner cuticle of engorging females. Differences in cytokines responses were observed between tick-infested and non-infested mice. Proinflammatory Thl T lymphocyte cytokines were suppressed and Th2 cytokines were enhanced for infestation with H. dromedarii. The data indicated a polarization of immune response towards Th2 lymphocytes.
Saad
Abdel Hakim
AH
Department of Zoology, Faculty of Science, Cairo University, Egypt.
Ashery
Madeha
M
Osman
Ahmed
A
Sadawy
Hanan El
HE
D000818:Animals; D004906:Erythrocyte Count; D006400:Hematocrit / Q000662:veterinary; D006454:Hemoglobins / Q000032:analysis; D007111:Immunity, Cellular; D007074:Immunoglobulin G / Q000097:blood; D026863:Ixodidae / Q000469:parasitology*; D007958:Leukocyte Count; D051379:Mice; D008807:Mice, Inbred BALB C; D009348:Nematoda / Q000254:growth & development; D013047:Specific Pathogen-Free Organisms; D018418:Th2 Cells / Q000276:immunology*; D013984:Tick Infestations / Q000097:blood / Q000276:immunology* / Q000469:parasitology
D006454:Hemoglobins; D007074:Immunoglobulin G