Domanda del libro di testo
Which of the following is most effective in preventing infection by Giardia? __________
a. Sexual abstinence
b. Drinking only bottled water
c. Use of insect repellent
d. Cooking all food
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Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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TOC.tableOfContents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Non è quello che usi tu?Cambia libro di testo
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Bauman 6th EditionCh. 23 - Parasitic Protozoa, Helminths, and Arthropod VectorsProblema 20
Bauman 6th EditionCh. 23 - Parasitic Protozoa, Helminths, and Arthropod VectorsProblema 20Capitolo 23, Problema 20
Trophozoite-cyst conversion is vital to the life of __________.
a. Balantidium
b. Entamoeba
c. Giardia
d, all of the above
Guida verificata passo dopo passo1
Understand the biological significance of trophozoite-cyst conversion: This process allows certain protozoan parasites to survive harsh environmental conditions by transforming from an active, feeding trophozoite form into a dormant, resistant cyst form.
Identify the organisms listed: Balantidium, Entamoeba, and Giardia are all protozoan parasites known to infect humans and have life cycles involving trophozoite and cyst stages.
Recall that trophozoite-cyst conversion is essential for transmission and survival outside the host in all three organisms, as cysts are the infective form that can survive in the environment.
Analyze the options: Since all three genera undergo trophozoite-cyst conversion as a vital part of their life cycle, the correct understanding is that this process is important for all of them.
Conclude that the answer corresponds to the option indicating all listed organisms rely on trophozoite-cyst conversion.
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Trophozoite and Cyst Forms
Many protozoan parasites exist in two main forms: the trophozoite, which is the active, feeding stage, and the cyst, which is a dormant, resistant stage. The conversion between these forms allows the organism to survive harsh conditions and facilitates transmission between hosts.
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Life Cycle of Protozoan Parasites
Protozoan parasites like Balantidium, Entamoeba, and Giardia have complex life cycles involving trophozoite and cyst stages. Understanding these cycles is essential to grasp how infection spreads and how the parasite adapts to different environments within and outside the host.
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Role of Cyst Formation in Transmission
Cyst formation is crucial for the survival of protozoa outside the host and for infecting new hosts via contaminated food or water. The cyst stage protects the parasite from environmental stress, making it a key factor in disease epidemiology and control.
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