What is the difference between food poisoning and food infection? Are antibiotics useful in either of them?
What will be an ideal response?
Answer: Food poisoning, also called food intoxication, results from the ingestion of foods containing preformed microbial toxins. Foodborne infections result from ingestion of pathogen-contaminated food. Antibiotics are not normally used to treat food poisoning, because the toxin is causing the disease. Food infections can be treated with antibiotics to kill the pathogen(s) more quickly but are not always used if the immune system is expected to be strong enough to rid the body of the infection on its own.
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A certain species of pine tree survives only in scattered locations at elevations above 2800 meters in the western United States. To understand why this tree grows only in these specific places, an ecologist should _____
A) conclude that lower elevations are limiting to the survival of this species B) study the anatomy and physiology of this species C) investigate the various biotic and abiotic factors that are unique to high altitude D) analyze the soils found in the vicinity of these trees, looking for unique chemicals that may support their growth E) collect data on temperature, wind, and precipitation at several of these locations for a year
A lichen is an example of:
A. a pathogen B. a parasite C. an archaean D. a methanogen E. a mutualistic relationship
Which patient group is least susceptible to infections by pseudomonads?
A) cystic fibrosis patients B) organ transplant recipients on immunosuppressive drugs C) burn patients D) otherwise healthy mothers in childbirth E) competitive swimmers who train daily
Classes of lipids include all of the following except
a. phospholipids. b. fats. c. waxes. d. carbohydrates. e. steroids.