Biology, 19.08.2019 01:30, nathrontheking
Staph infections, caused by the bacterium staphylococcus aureus, are increasing in frequency and are more difficult to treat with antibiotics. many staph infections are now caused by mrsa, and methicillin-resistant strain of s. aureus. what explains the more widespread phenomenon of mrsa prevalence in staph infections?
a) vaccines for mrsa have become not effective because of changes to human immune systems.
b) the presence of antibiotics induced the bacterial genomes to mutate and develop resistance to the drug.
c) decreased hospital sanitation practices to save money have resulted in increased presence of resistant staph infections.
d) selective pressures by excessive antibiotic use have increased the frequency of resistant strains of s. aureus over the last few decades.
Answers: 1
Biology, 22.06.2019 02:00, gabe3636
Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.
Answers: 1
Biology, 22.06.2019 12:30, mattydoug4818
What is the most important inorganic material for livings things? ! due tomorrow!
Answers: 1
Biology, 22.06.2019 14:30, rallen1158
The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping
Answers: 1
Staph infections, caused by the bacterium staphylococcus aureus, are increasing in frequency and are...
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