The SPF rabbits were inoculated with oocysts of Eimeria flavescens and the first newly developed oocysts were recovered. They were used for inoculation of other rabbits which consequently excreted oocysts sooner than in the previous passage. By repeated use of this method, the prepatent period was shortened after 18 passages by more than 60 h. The endogenous development of this precocious line (PL) differed from that of the original strain (OS). Compared to OS, two asexual generations, second (or third) and fourth, were absent in PL. The first merogony took place in the jejunum and ileum in OS and, in contrast, in the large intestine in PL. Like in other rabbit coccidia, two types of meronts (A and B) were seen in each generation. However, the ratio of B: A meronts in the last (fifth) asexual generation as well as ratio of microgamonts:macrogamonts differs in OS and PL.

• MeSH
• Eimeria růst a vývoj   patogenita   ultrastruktura   MeSH
• kokcidióza parazitologie   přenos   veterinární   MeSH
• králíci MeSH
• oocysty růst a vývoj   MeSH
• organismy bez specifických patogenů MeSH
• parazitární nemoci střev patologie   přenos   veterinární   MeSH
• sporozoiti růst a vývoj   MeSH
• stadia vývoje * MeSH
• střevní sliznice parazitologie   patologie   MeSH
• tenké střevo parazitologie   patologie   MeSH
• tlusté střevo parazitologie   patologie   MeSH
• transmisní elektronová mikroskopie veterinární   MeSH
• zvířata MeSH
• Check Tag
• králíci MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

The endogenous cycle of Eimeria flavescens was studied in specific pathogen-free rabbits by means of histology and transmission electron microscopy. In total, five asexual generations were observed and two types of meronts and merozoites were found in each generation. Type A gave rise to a smaller number of thick polynucleate merozoites in which daughter merozoites were formed by endomerogony, while in the type B meronts slender uninucleate merozoites arose from ectomerogony. The first generation meronts were found in the crypts and proximal part of the villi of the duodenum and jejunum, whereas the three following generations developed in the superficial epithelium of the large intestine (cecum, vermiform appendix and colon). The last merogony as well as gamogony took place in crypts of the large intestine.

• MeSH
• Eimeria růst a vývoj   patogenita   ultrastruktura   MeSH
• elektronová mikroskopie MeSH
• kokcidióza parazitologie   patologie   MeSH
• králíci parazitologie   MeSH
• organismy bez specifických patogenů MeSH
• parazitární nemoci střev parazitologie   patologie   MeSH
• parazitární nemoci u zvířat parazitologie   patologie   MeSH
• stadia vývoje MeSH
• střevní sliznice parazitologie   patologie   MeSH
• zvířata MeSH
• Check Tag
• králíci parazitologie   MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH