Chapter : Introduction to Medical Parasitology
25 Apr 2022
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Two fundamental kingdoms for parasites: animalia (worms) Classic linnean classification: kingdom > phylum > class > order > Recent advances in biochemical and molecular methods have led to a revision of the classification of protozoans using a system based on hierarchical ranks (e. g. , super-group, first rank, second. Labortory methods: most commonly ordered: examination of blood and fecal specimen, other less common: urogenital, sputum, aspirates and biopsy material, examination of blood. Parasites that may b detected in the blood: Lesmania spp leismaniasis: wuchereria bancrofti, brugia spp, loa, and manonella spp) - filariasis, thick and thin smears. Staining dehemoglobinized rbcs only white blood cell (wbc) nuclei, platelets, and parasites (if present) are visible. Blood is concentrated in a small area that is many cell layers deep. Contains 15 to 30x more blood than thin smears chance to detect light parasitemia blood is spread over the slide in a thin layer yields intact, nonoverlapping cellular elements.
