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Increased numbers of duodenal mucosal mast cells in turkeys inoculated with hemorrhagic enteritis virus.
1992
Opengart K. | Eyre P. | Domermuth C.H.
The relation between average duodenal mast cell count, duodenal mucosal mast cell numbers, duodenal connective tissue mast cell numbers, circulating basophil numbers, heterophil-to-lymphocyte ratio, and lesion score were studied to gain an understanding of the events that may lead to intestinal lesion formation associated with hemorrhagic enteritis virus (HEV) infection. Changes in vascular permeability in the duodenum in birds inoculated with HEV were examined, using colloidal carbon and ferritin as vascular markers. Turkeys inoculated with HEV had significantly (P < 0.05) higher duodenal mast cell counts than did noninfected controls. Birds inoculated with HEV had significantly (P < 0.05) more mucosal mast cells than did phosphate-buffered saline solution-inoculated birds. Connective tissue mast cell and basophil numbers were unaffected by viral inoculation. Thermal stress did not have significant effect on lesion severity, but did increase number of birds that developed the characteristic intestinal lesions. The heterophil-to-lymphocyte ratio was significantly (P < 0.05) higher in HEV-inoculated birds, compared with phosphate-buffered saline solution-inoculated controls. Increase in vascular permeability was only detected in HEV-inoculated birds with intestinal lesions. Results indicate that mast cells, and the vasoactive mediators contained within mast cells, may be important in the early manifestation of HEV infection. They also provide a possible mechanism through which biochemical and physiologic changes characteristic of HEV infection can occur.
Show more [+] Less [-]Pasteurella haemolytica leukotoxin induces histamine release from bovine pulmonary mast cells.
1994
Adusu T.E. | Conlon P.D. | Shewen P.E. | Black W.D.
Histopathological studies on the influence of mast cell in the growth of rat mammary carcinoma, 2; Effect of mast cell mediator on the development of rat mammary carcinoma
1991
Kim, T.H. (Korea Atomic Energy Research Institute, Seoul (Korea Republic). Korea Cancer Center Hospital) | Lee, C.S. (Kyungpook National Univ., Taegu (Korea Republic). Coll. of Veterinary Medicine)
Histopathological studies on the influence of mast cell in the growth of rat mammary carcinoma, 3; Effect of xylazine on the course of DMBA- induced rat mammary carcinoma
1991
Kim, T.H. (Korea Atomic Energy Research Inst., Seoul (Korea Republic). Korea Cancer Center Hospital) | Lee, C.S. (Kyungpook National Univ., Taegu (Korea Republic). Coll. of Veterinary Medicine)
Histopathological studies on the influence of mast cell in the growth of rat mammary carcinoma - (1) - Distribution of mast cell on the development of DMBA-induced mammary carcinoma
1990
Kim, T.H. (Korea Atomic Energy Research Institute, Seoul (Korea Republic). Korea Cancer Center Hospital) | Lee, C.S. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)
