How many hosts does Schistosoma japonicum need to infect to complete a life cycle? Which life-history stage is potentially infectious to humans?
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How many hosts does Schistosoma japonicum need to infect to complete a life cycle? Which life-history stage is potentially infectious to humans?
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- What is the intermediatehost of Schistosoma mansoni?Where does that host live?Mycorrhizal fungi form obligate symbiotic relationships within plants. They are able to fix N2 into a usable form of nitrogen. In exchange, they receive nutrition from the plant. Which of the following is a true statement concerning mycorrhizal fungi? a) Finding a host plant is not crucial to their survival. b) They are a dominant species. c) They cannot survive without the host plant. d) They are considered plant parasites.Which form of Plasmodium passes from mosquitoes to people and causes infection?a) Trophozoitesb) Merozoitesc) Sporozoitesd) Vegetative forme) Oocyst
- Answer the following questions with respect to both Clonorchis and Schistosoma: (a) how do humans become infected? (b) what is the general geographical distribution? (c) what are the main disease conditions produced?33) Which of the following is a common cause of mycoses? A) Opportunistic Infection B) Overwhelming Exposure C) Suppressed Immune System D) All of the above are causes of mycosesWhich of the following are true regarding parasites in the phylum Apicomplexa? a) they are intracellular parasites b) when they are inside cells, they exist within a parasitophorous vacuole c) the phylum includes the malaria parasites d) movement of the parasites into cells involves the action of an actomyosin motor e) they only reproduce asexually
- Where do the organisms that cause staph and strep infections typically come from? What causes them to be pathogenic?Which part of tobacco plant is infected by meloidigyne incognita?Which of the following is not applicable to Legionella pneumophila, or to the disease it causes, Legionnaire's disease? A) O It causes an atypical form of pneumonia B) OFound in the environment, typically as an intracellular parasite of amoebas C) O lt is a Gram-negative motile rod D) OIt is a foodborne disease E) OIt is an invasive pathogen that can multiply within macrophages
- All of the following are true of Legionnaires’ disease excepta) the causative organism can grow inside protozoa.b) it spreads readily from person to person.c) it is more likely to occur in long-term cigarette smokers than in nonsmokers.d) it is often associated with diarrhea or other intestinal symptoms.e) it can be contracted from household water supplies.How does intercellular invasion and colonization differ from intracellular invasion and colonization? Which type of colonization is utilized by necrotrophs? Which type of colonization is utilized by biotrophs?34) Which of the following fungal diseases involves an intracellular parasite that partially disables macrophages, allowing for spread beyond the lungs. A) Coccidioidomycosis C) Pneumocystis B) Blastomycosis D) Histoplasmosis 35) Of the following genetic material types seen in viruses, which genetic material type leads to rapid, almost immediate production of viral proteins, followed closely by replication of the genome leading to rapid synthesis of new viruses, which tends to overwhelm the host, as exemplified in a viral disease which causes more than 200,000 deaths of children worldwide each year. A) negative (-) strand single-stranded RNA B) double-stranded RNA D) positive (+) strand single-stranded RNA C) single-stranded DNA