Most cases of pharyngitis occur during the colder months and are primarily caused by:
a. S. pyogenes.
b. viruses.
c. Streptococcus pneumoniae.
d. Staphylococcus aureus.
B
Most cases of pharyngitis occur during the colder months and often accompany other infections, primarily those caused by viruses. Patients with respiratory tract infections caused by influenza types A and B, parainfluenza, coxsackie A, rhinoviruses, or coronaviruses frequently complain of a sore throat. Pharyngitis, often with ulceration, is also commonly found in patients with in-fectious mononucleosis caused by either the Epstein-Barr virus or cytomegalovirus. Although less common, pharyngitis caused by adenovirus or herpes simplex virus is clinically severe. Finally, acute retroviral syndrome caused by human immunodeficiency virus-1 (HIV-1) is associated with acute pharyngitis.
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a. Cl? b. K+ c. Ca2+ d. Na+Zn2+ e. Zn2+
The carbamino effect describes a change in the conformation of hemoglobin that is induced by a(n)
A) decrease in temperature. B) increase in pH. C) decrease in pH. D) increase in CO2. E) increase in temperature.
What is the risk associated with the use of biological controls in pest management?
A. pollution caused by chemical pesticides B. loss of pollinating animal species C. the possibility of the biocontrol species becoming invasive D. the evolution of pesticide resistence E. All of the above are risks associated with the use of biological controls.
Retroviruses have the enzyme ________ that catalyzes the synthesis of DNA from viral RNA.
What will be an ideal response?