MCB 2010 Exam 4 Study Guide | 100% Passed

MCB 2010 Exam 4 Study Guide | 100% Passed All of the following are true regarding African trypanosomiasis EXCEPT A) it is also known as "sleeping sickness." B) all subspecies of Trypanosoma brucei have multiple hosts. C) it is transmitted by the tsetse fly. D) death ultimately occurs without proper treatment. E) Trypanosoma brucei gambiense is the more common cause of disease. -Answer-B) all subspecies of Trypanosoma brucei have multiple hosts. Bacterial encephalitis and meningitis are difficult to treat because A) no medications exist for treatment of these infections. B) antibiotics damage nervous tissue. C) many antibiotics cannot penetrate the blood-brain barrier. D) the infections move along peripheral nerves. E) it is very difficult to determine the causative microbe. -Answer-C) many antibiotics cannot penetrate the blood-brain barrier. All of the following organisms cause meningitis EXCEPT A) Neisseria meningitidis. B) Haemophilus influenzae. C) Cryptococcus neoformans. D) Streptococcus pneumoniae. E) Mycobacterium leprae. -Answer-E) Mycobacterium leprae. All of the following organisms are transmitted via the respiratory route EXCEPT A) Neisseria meningitidis. B) Haemophilus influenzae. C) Listeria monocytogenes. D) Cryptococcus neoformans. E) None of the answers is correct; all of these organisms are transmitted by the respiratory route. -Answer-C) Listeria monocytogenes. Which of the following statements about rabies is FALSE? A) It is caused by Lyssavirus. B) Hydrophobia is associated with the disease. C) Most infections in the U.S. are the result of bites from infected dogs. D) Diagnosis is based on immunofluorescent techniques. E) Average incubation period is 30 to 50 days after initial infection. -Answer-C) Most infections in the U.S. are the result of bites from infected dogs. The symptoms of tetanus are due to A) endospore formation. B) systemic infection. C) sustained relaxation of muscles. D) tetanospasmin. E) inflammation. -Answer-D) tetanospasmin. All of the following diseases are caused by arbovirus EXCEPT A) St. Louis encephalitis. B) eastern equine encephalitis. C) West Nile encephalitis. D) primary amebic meningoencephalitis (PAM). E) None of the answers is correct; all of these diseases are caused by arbovirus. - Answer-D) primary amebic meningoencephalitis (PAM). A 30-year-old woman was hospitalized after she experienced convulsions. On examination, she was alert and oriented and complained of a fever, headache, and stiff neck. Any of the following organisms could be responsible for her symptoms EXCEPT A) Clostridium botulinum. B) Listeria monocytogenes. C) Haemophilus influenza. D) Streptococcus pneumoniae. E) Any of these organisms could be the causative agent. -Answer-A) Clostridium botulinum. The most effective control of mosquito-borne disease is A) treatment of infected humans. B) treatment of infected wild animals. C) elimination of the mosquito population. D) avoidance of endemic areas. E) treatment of uninfected humans. -Answer-C) elimination of the mosquito population. Initial treatment for tetanus in an unimmunized person with a puncture wound is A) tetanus toxoid. B) tetanus immune globulin. C) penicillin. D) none; no action is necessary. E) debridement. -Answer-B) tetanus immune globulin Initial treatment for tetanus in a fully immunized person with a puncture wound is A) tetanus toxoid. B) tetanus immune globulin. C) penicillin. D) DTaP. E) debridement. -Answer-A) tetanus toxoid. The most common route of central nervous system invasion by pathogens is through A) the skin. B) the circulatory system. C) the gastrointestinal system. D) the parenteral route. E) direct penetration into nerves. -Answer-B) the circulatory system. A pathologist detects Negri bodies while examining a brain section taken at autopsy. What was the cause of death? A) rabies B) meningococcal meningitis C) eastern equine encephalitis D) Hansen's disease E) poliomyelitis -Answer-A) rabies Encephalitis is more common in the summer months because A) pathogens are present in swimming pools and lakes. B) ameba populations increase in swimming pools. C) ticks are encountered while hiking in the woods