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Publicada porJuan Luis Zarza Modificado hace 7 años
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Coccidian protozoan Obligate parasite Single-celled
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Worldwide Subtropical Tropical
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Domain: Eukaryote Phylum: Apicomplexa Class: Coccidia Order: Eucoccidiorida Family: Eimeriidae Domain: Eukaryote Phylum: Apicomplexa Class: Coccidia Order: Eucoccidiorida Family: Eimeriidae
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intestinal villus (enterocytes) lamina propria of the villus
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1. Sexual 2. Asexual
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Immature, unsporulated oocyst is excreted through feces. Sporoblast divides into two Each sporoblast develops into a sporocyst with 4 sporozoites, resulting in mature oocysts. The time spent in stages 1 through 3 is 2-3 days. Mature oocyst is ingested. Oocyst bursts. Sporozoites are released and lodge into the intestinal lining. Sporozoites undergo asexual reproduction to form merozoites. The merozoites mature into gametes which undergo fertilization to produce a new oocyst
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Small intestine
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Oocyst. Size: 20-23 μm long 10-19 μm wide
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Human Animal
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o Transmitted by fecal-oral contamination. o Occurs poor sanitation conditions. o 3-14 day incubation period between the ingestion of an infectious oocyst and onset of symptoms. o After ingestion, the sporozoites invade in the small intestine which eventually destroys these cells..
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Water contaminated food Poor sanitation
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Acute infection include: Diarrhea with abdominal pain Malabsorption Weight loss
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Abdominal pain and cramping Anorexia and weight loss General malaise Low fever Vomiting
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Oocysts in the feces Duodenal biopsy Enterotest
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Typical laboratory analyses include: Microscopy Morphologic comparison with other intestinal parasites Bench aids for Isospora
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Warn travelers not to visit regions where the protozoan is endemic
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Trimethoprim (TMP) Sulfamethoxazole (SMZ) Co-trimoxazole
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