The pH in the rumen of corn-fed cows is imbalanced and harbors E. coli bacteria (such as strain O157:H7) which is especially pathogenic to humans. True False
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The pH in the rumen of corn-fed cows is imbalanced and harbors E. coli bacteria (such as strain O157:H7) which is especially pathogenic to humans.
True
False
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- clostridium botulinum is a bacterium usually present in soil that may cause botulism. Briefly explain why one or few cells of a pathogenic bacterium, such as clostridium botulism, by itself typically does not secrete a toxin, despite the species as a whole being characterized as toxin producing.How can this be explained in lamen terms the step by step results of enterobacter aerogenes? DISCUSS all the results. Discuss in a logical and step by step fashion how you concluded that you had a certain microorganism. You need to explain which observation(s) enabled you to identify your unknown microorganism (Enterobacter aerogenes). To convince your reader you need phrases like; This observation “suggested” that my organism is E. coli This observation “confirmed” that my organism is E. coliAlso phrases like; This observation “suggested” that my organism is NOT Enterobacter aerogenesHigh risk foods for spreading bacteria are those that contain high levels of protein. True or False?
- Haemophilus influenzae must be grown on special blood agars, e.g. chocolate agar, which is blood agar treated with heat to release gorwth factors and to destroy inhibitory enzymes. Thus Haemophilus is described as fastidious oxygen-sensitive oxygen labile voraciousHow can this be explained in lamen terms the step by step results of enterobacter aerogenes? DISCUSS all the results. Discuss in a logical and step by step fashion how you concluded that you had a certain microorganism.You need to explain which observation(s) enabled you to identify your unknown microorganism (Enterobacter aerogenes).To convince your reader you need phrases like; This observation “suggested” that my organism is Enterobacter aerogenes This observation “confirmed” that my organism is Enterobacter aerogenesHow does your Mycobacterium tuberculosis pathogen obtain the requirements to build its biological macromolecules? discussing where your bacteria gets its basic requirements for the elements of life - carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur. Basically the nutritional requirements, not specifically each element individually.
- Since E. coli normally grows in the human gut, speculate on why its optimal growth temperature is different from the commonly cited temperature of a normal healthy human -37°C.Name ONE glycopeptide and state what this glycopeptide binds to within a named bacterium and how this kills the bacteriumholsappleeus scarius is a normal flora of the human intestenal tract. its facultative anaerobe capable of catabolizing carbohydrates. which conditions will give them the most growth?
- 1). SIM Tubes and TSI slants turn black if the organism is able to reduce iron compounds. For which organism(s) below would you expect a black reaction? Circle all that apply. Escherichia coli. Proteus vulgaris. Salmonella typhimurium. Alcaligenes faecalis. Shigella flexneri. 2). If Citrate is a sugar and fermentation generates an acid, why does the BromThymol Blue indicator in the media turn blue and not yellow? 3). Why is Salmonellosis associated with eggs? Can you get Salmonellosis from other animal sources?The following microbes are NOT made of cells, O Escherichia coli O Candida albicans Taenia solium Hepatitis B All of these are made of cellsFlasks A and B contain broth, and are inoculated with an identical number of bacteria that are facultative anaerobes. Flask A contains a triglyceride lipid as the sole nutrient source, and Flask B contains a monosaccharide called fructose as the sole nutrient source. Both flasks are incubated at 30°C with aeration (oxygen is added to the broth). Assume the bacteria are capable of catabolism of both fructose and triglycerides. Mark all the correct statements pertaining to these cultures. A. Under anaerobic conditions, cells in flask A will produce more ATP B. Cells from flask B will produce more carbon dioxide C. Cells from flask B will produce more ATP D. Flask A will have the greater cell mass E. Cells from flask A will produce more ATP F. Cells from flask A will produce more carbon dioxide G. Flask B will have the greater cell mass H. Under anaerobic conditions, cells in flask B will produce more ATP
