Parasitology — DU B.Sc. (Hons.) Zoology Previous Year Question Papers

5. Describe the life cycle and pathogenicity of the filarial worm in detail. Add a note on nocturnal periodicity shown by the microfilarae. (8+4+3-15) 6. 7. Describe the various groups of mites, discuss their biology in general. Enlist the etiological agents of diseases transmitted by them. Highlight some methods to prevent and control their growth and proliferation. 15 Write short note on any three of the following : (a) Pathogenicity of Schistosoma haematobium (c) Schizogonic phase of Plasmodium vivax (e) Hood Mocking bird B.Sc. (P) Life Science (NEP-UGCF) 1. (i) Explain the following terms : 2×5=10 (b) Occult Filariasis (e) Incubation period (ii) Fill in the blanks : 5 (a) ......... is the infective stage of W. (b) Egg stage of Pediculus humanus is known as ........ . (c) Infective stage of malarial parasite is called ......... (d) The adult round worms are found mainly........ part of human intestine. (e) ........is called the spreading of diseases from animals to humans and vice versa. (iii)Differentiate between any five of the following terms : 2×5=10 (a) Definite host and Intermediate host (b) Filariform and rhabditiform larva (c) Cystic stage and Trophozoite stage (d) Corticated and Decorticated eggs (e) Mechanical vector and Biological vector (f) Head louse and body louse (iv) Name the parasite where following structures are seen : 5 (a) Genal Comb (c) Signet ring (d) Copulatory Bursa (e) Gynaecophoric canal 2. Describe morphology and life cycle of Ascaris. What are the salient points of pathogenesis and clinical features of this parasite? 15 3. Explain about the pathogenesis of African sleeping sickness. Add a note on parasites' laboratory diagnosis, treatment, prevention and control methods. 15 4. (a) Diagrammatically explain the life cycle of (b) Give a brief account of epidemiology, pathogenicity and treatment of Trichinella spiralis. 6