Epidemiological association between hemophilia
Answer: Since hemophilic patients need frequent transfusions of clotting factors (VIII or IX) they are more susceptible to contamination by infectious agents present in the blood from which the transfused elements come. In the past the blood banks did not usually perform HIV detection tests and many hemophilic patients have become infected with the virus
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Examine the figure and statements below. Which one of the statements is incorrect?
A. mRNA for caudal and hunchback are evenly distributed in the oocyte, but bicoid and nanos mRNA are located either anteriorly or posteriorly, respectively. B. Bicoid protein promotes the transcription of the hunchback gene in the anterior region of the embryo. C. Nanos protein represses the translation of hunchback mRNA in the posterior region of the embryo. D. Bicoid protein represses the translation of caudal mRNA in the anterior region of the embryo. E. The expression pattern of Caudal and Hunchback proteins is an example of gene regulation at the level of translation.
Which of the following public health methods impacted the quality of life through the 20th century by lowering the incidence of many infectious diseases?
A. Water treatment B. Antimicrobial agents C. Immunizations D. Strict sanitation guidelines E. All of the choices are correct.
Which of the following statements regarding Clostridium difficile infection is incorrect?
A. It is the major cause of diarrhea in hospitals. B. It is a colitis that is a superinfection. C. It is associated with disruption of normal biota due to broad-spectrum antimicrobials. D. It is due to ingestion of contaminated, improperly stored, cooked meats and gravies.
Which of the following STDs can be cured?
a. syphilis b. gonorrhea c. chlamydia d. trichomoniasis e. all of these