Water & the Environment
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Which of the following statements is true regarding facultative pathogens, and which is true regarding obligate pathogens? Please mark the right answer: They may exploit a host to reproduce, and they occasionally cause infection.
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Which of the following statements is true regarding facultative pathogens, and which is true regarding obligate pathogens? Please mark the right answer: They need a host to complete their life cycle, and they necessarily cause disease.
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Why can’t indicators such as fecal coliforms be used to indicate Legionella in the water?
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How does the relationship between Legionella and amoebas promote legionellosis?
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Due to better sanitation and hygiene, children were first exposed to poliovirus at an older age when the maternal antibodies no longer protected them.
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Better hygiene habits, such as handwashing before meals, might have helped prevent disease spread.
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The decline in poliovirus was due to better sanitation and hygiene habits, similar to the decline in diphtheria, typhoid, and tuberculosis.
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What kinds of poliovirus vaccination methods are used around the world? Choose two answers.
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