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Phylogenetic relationships among eight Eimeria species infecting domestic fowl inferred using complete small subunit ribosomal DNA sequences.
Clades of avian Eimeria species and the apparent absence of coccidia that infect the ceca of jungle fowl all suggest that E. necatrix and E. tenella may have arisen from a host switch, perhaps from the North American turkey, Meleagris gallopavo. Expand
Genotype and subtype analyses of Cryptosporidium isolates from dairy calves and humans in Ontario
The findings suggest that cattle and other ruminants may be a source of sporadic human infections in Ontario, and is the second published report of human infection with Cryptosporidium cervine genotype. Expand
The demise of a phylum of protists: phylogeny of Myxozoa and other parasitic cnidaria.
Reassessment of myxozoans as metazoans reveals terminal differentiation, typical metazoan cellular junctions, and collagen production, and it is recommended that the group as a whole be removed from all protistan classifications and placed in a more comprehensive cnidarian system. Expand
The life history, ultrastructure, and experimental transmission of Hepatozoon catesbianae n. comb., an apicomplexan parasite of the bullfrog, Rana catesbeiana and the mosquito, Culex territans in
The haemogregarine parasite of bullfrogs was designated as a new combination, Hepatozoon catesbianae, based on data presented in this study and the earlier description by Stebbins in 1903. Expand
Genetic and Antigenic Evidence Supports the Separation of Hepatozoon canis and Hepatozoon americanum at the Species Level
Sequence analysis of 368 bases near the 3′ end of the 18S rRNA gene from each species revealed a pairwise difference of 13.59% in Hepatozoon canis and Hepatozinum. Expand
Responses of chickens to a recombinant refractile body antigen of Eimeria tenella administered using various immunizing strategies.
Results show for the first time naked DNA vaccination with a single coccidial antigen that protects chickens (as measured by reduced lesion scores and high rate of growth) against cecal cocCidiosis. Expand
The development ofHepatozoon sipedon sp. nov. (Apicomplexa: Adeleina: Hepatozoidae) in its natural host, the Northern water snake (Nerodia sipedon sipedon), in the culicine vectorsCulex pipiens andC.
The life cycle ofHepatozoon sipedon sp. nov. was studied in two snake species, the Northern water snake and the Eastern garter snake, in its mosquito hostsCulex pipiens andC. territans, and in theExpand
Phylogenetic Relationships Among Anuran Trypanosomes as Revealed by Riboprinting
Twenty trypanosome isolates from Anura assigned to several species were characterized by riboprinting–restriction enzyme digestion of polymerase chain reaction amplified small subunit ribosomal RNA genes, and Trypanosoma chattoni was shown to be only distantly related to the other species. Expand
A light and electron microscopic study of Trypanosoma fallisi N. Sp. in toads (Bufo americanus) from Algonquin Park, Ontario.
Epizootiological and experimental evidence suggests that this trypanosome is transmitted to the toads by the leech, Batracobdella picta, and geographic isolation, host and vector differences as well as slight morphological differences indicate that speciation has occurred. Expand
Infectivity of cultured Trypanosoma fallisi (Kinetoplastida) to various anuran species and its evolutionary implications.
The data suggest that the potential for host-switching decreases with increased evolutionary distance of the potential anuran host, and Trypanosoma ranarum was uninfective to the bufonids and hylids tested. Expand