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What is a protozoan cyst? Discuss the importance of this structure in the ability of Giardia to cause disease.
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- Trichomonas vaginalis is a Protozoa transmitted via sexual intercourse by what type of infective stage? Cyst Trophozoite Cyst and Trophozoite Eggs Question 26 To exterminate the disease African Trypanosomiasis caused by the Protozoan Trypanosoma brucei spp. which intermediate host should be eliminated? Cattle Pig Anopheles mosquito Glossina flyDescribe the stages of the Plasmodium life cycle within the human host, including the inoculation through the bite of infected mosquitoes, the replication of parasites within hepatocytes, and the subsequent invasion of red blood cells. Explain how these lead to symptomatic disease. Discuss the contCharacteristics of Dientamoeba fragilis include all of the following except: a. This organism is a flagellate with internal flagella b. Transmission is thought to occur through the ingestion of specific helminth eggs c. This organism is pathogenic and tends to be more commonly found in children d. Trophozoites contain a single nucleus, while the cysts contain two nuclei
- What is the diagnostic stage of the following and explain: 1. Plasmodium 2. Trypanosomes 3. LeishmaniaThe large unicellular organisms have been observed in the vagina smear of a female patient with the symptoms of the inflammatory process of urogenital apparatus. The cell bodies of the organisms were pear-shaped with pointed posterior part, large nucleus and undulating membrane. What protozoans were found in the smear? Select one: a. Trichomonas vaginalis O b. Trypanosoma brucei gambiense O c. Lamblia intestinalis d. Toxoplasma gondii e. Trichomonas hominisOne of the most characteristic symptoms of malaria is the alternation of attacks (involving a cold phase, a hot phase, and a sweating phase) with periods of 1 or 2 days of no or few fevers. Given the life cycle of Plasmodium what is the best explanation for this pattern: When free in the blood, merozoites release chemicals that directly cause body responses. Merozoites appear in coordinated “waves”, which explains the cycling attacks Merozoites entering the red blood cells generate a strong response from the red blood cells, which stimulates a massive immune response Attack phase correlates with simultaneous bursting of infected red blood cells, releasing thousands or millions of merozoites. This triggers massive immune response, resulting in symptoms Plasmodium generates a constant accumulation of irritants in the blood, mostly residues from digesting hemoglobin . Once the amount reaches a critical level, these trigger a massive immune response
- Aspergillus fumigatus may cause pulmonary mold infections in immunocompromised patients. Which of the following structures causes the tissue destruction in the patients: tissue destruction by enterotoxins tissue destruction by pseudohyphae none of the above apply tissue destruction by cysts tissue destruction by plaque formation tissue destruction by aerial hyphae tissue destruction by vegetative hyphaeWhy can superficial mycoses in humans lead to bacterial infections?Protozoans that absorb decaying organic debris and solid matter are called:
