Topic
Coccidia
About: Coccidia is a research topic. Over the lifetime, 1071 publications have been published within this topic receiving 21986 citations.
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TL;DR: This chapter provides an up to date review of the biology, biochemistry and host parasite relationships of Cryptosporidium.
1,361 citations
Book•
01 Jan 1992
TL;DR: This book presents a checklist of protozoan parasites infecting commercially important fishes, and explains basic parasitological terms and concepts with regard to protozoa parasites of fishes.
Abstract: Preface. 1. Introduction to the study of protozoan parasites of fishes. Subkingdom Protozoa. Explanation of basic parasitological terms and concepts with regard to protozoan parasites of fishes. Techniques for the study of protozoan parasites of fish . List of abbreviations used in the text. Practical key for the determination of fish protozoa in fresh material. 2. Flagellates (Phylum Mastigophora). Class Dinoflagellida. Class Proteromonadea. Class Kinetoplastidea. Class Retortamonadea. Class Diplomonadea. Class Trichomonadea. 3. Opalines (Phylum Opalinata). Class Opalinatea. 4. Amoebae (Phylum Rhizopoda). Subphylum Amoebozoa. Class Lobosea. Class Filosea, order Gromiida. 5. Apicomplexans (Phylum Apicomplexa). Class sporozoa. Subclass Coccidia. Subclass Piroplasmia. 6. Microsporidia (Phylum Microspora). 7. Myxosporidia (Phylum Myxozoa). 8. Ciliates (Phylum Ciliophora). Class Kinetophragminophorea. Class Oligohymenophora. Class Polyhymenophora. 9. Miscellaneous Organisms, Sporozoon, Dermocystidium, Epulopiscium, Rhinchodinium. 10. A checklist of protozoan parasites infecting commercially important fishes. Legends to plates and figures. Index.
753 citations
TL;DR: 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.
Abstract: Complete 18S ribosomal RNA gene sequences were determined for 8 Eimeria species of chickens and for Eimeria bovis of cattle. Sequences were aligned with each other and with sequences from 2 Sarcocystis spp., Toxoplasma gondii, Neospora caninum, and 4 Cryptosporidium spp. Aligned sequences were analyzed by maximum parsimony to infer evolutionary relationships among the avian Eimeria species. Eimecia bovis was found to be the sister taxon to the 8 Eimeria species infecting chickens. Within the avian Eimeria species, E. necatrix and E. tenella were sister taxa: this clade attached basally to the other chicken coccidia. The remaining Eimeria spp. formed 3 clades that correlated with similarities based on oocyst size and shape. Eimeria mitis and Eimeria mivati (small, near spherical oocysts) formed the next most basal clade followed by a clade comprising Eimeria praecox. Eimeria maxima, and Eimeria brumetti (large, oval oocysts), which was the sister group to Eimeria acervulina (small, oval oocysts). The 4 clades of avian Eimeria species were strongly supported in a bootstrap analysis. Basal rooting of E. necatrix and E. tenella between E. bovis and the remaining 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.
427 citations
TL;DR: In this paper, the authors provide morphologic and molecular characterization of three parasites isolated from primates and names each isolate: Cyclospora cercopitheci sp.n.n for a species recovered from green monkeys, colobus monkeys, and C. papionis et al. n.
Abstract: In recent years, human cyclosporiasis has emerged as an important infection, with large outbreaks in the United States and Canada. Understanding the biology and epidemiology of Cyclospora has been difficult and slow and has been complicated by not knowing the pathogen s origins, animal reservoirs (if any), and relationship to other coccidian parasites. This report provides morphologic and molecular characterization of three parasites isolated from primates and names each isolate: Cyclospora cercopitheci sp.n. for a species recovered from green monkeys, C. colobi sp.n. for a parasite from colobus monkeys, and C. papionis sp.n. for a species infecting baboons. These species, plus C. cayetanensis, which infects humans, increase to four the recognized species of Cyclospora infecting primates. These four species group homogeneously as a single branch intermediate between avian and mammalian Eimeria. Results of our analysis contribute toward clarification of the taxonomic position of Cyclospora and its relationship to other coccidian parasites.
422 citations
361 citations