Question

1. Which of the following is nottrue of necrotizing fasciitis?

		All of the above are true.
		Sudden onset, rapid spread.
		Easily treatable with appropriate antibiotic determined after isolation of agent.
		So called “Flesh Eating Disease” with necrosis (death) of soft tissue.
		Severe pain, inflammation, fever, tissue becomes progressively swollen,    discolored, with blisters (bullae

2. Which is false concerning the following food-borne pathogens?

		Yersinia enterocoliticais a food-borne pathogen producing symptoms of appendicitis.
		Most Salmonella entericaserovars produce enterocolitis (gastroenteritis).
		Listeria monocytogenescan kill a developing fetus (or both mother and fetus) when the mother consumes unpasteurized dairy products.
		Vibrio parahemolyticusproduces severe skin lesions, enteritis and death
		3. With respect to vaccines and infections, which of the following is false? Hepatitis is caused by multiple types of virus; vaccines for Type A and B. The recombinant hepatitis B vaccine also protects against hepatitis D Smallpox (vaccinia virus) was eliminated through immunization with cowpox (variola virus). Measles (rubiola) causes encephalitis in 1 in 1000 and death in 1 in 3000 A resurgence of pertussis (“whooping cough”) in children (including San Antonio) is a result of under and non-immunized individuals 4. Which of the following is falseconcerning Gambierdiscus toxicus? It produces unusual sensations such as itching skin, aching teeth, numbness of the mouth and lips, reversal of hot-cold sensations, etc. Symptoms may last for days, weeks, or months+. It is a toxic dinoflagellate It causes the intoxication Ciguatera. None of the above is false. 5.Which is falseconcerning Zika virus? A. None of the above is false. B. Transmitted by day active Aedes aegyptimosquitoes, mother to fetus & sex. C. Single stranded (-) RNA Filoviridae. D. Associated with congenital microcephaly and Guillain Barre syndrome. E. Most are asymptomatic, in symptomatic resembles mild form of dengue 6. Which of the following is false concerning physical methods of controlling microbes A. A hot air oven operates at 170 C for 2 hrs. B> UV irradiation sterilizes better than ionizing (Cobalt 60 or gamma) irradiation C. Membrane and HEPA filtration are used to sterilize liquids and air espectively.   D. An autoclave operates at 121 C for 15 minutes. E. Pasteurization is 63C 30 min or shorter times at higher temp (HTST method) & is used to destroy pathogens in milk, other drinks, cheese and lunch meats. 7. Which of the following isfalseconcerning Bacillus anthrasis? A. Pulmonary anthrax (“woolsorter’s disease”) & GI anthrax most severe B. Protein capsule and anthrax AB toxin C. Select agent D. No vaccine Cutaneous anthrax (“black eschar”) 8. Which of the following is falseconcerning Salmonellaand Shigella. A.SalmonellaTyphi causes typhoid fever with serious systemic spread. B. Shigellacause bacillary dysentery. C. There is a capsule and an attenuated living vaccine for typhoid fever. D. Shigella are H2S + and motile, Salmonellaare H2S – and nonmotile E. Shigella dysenteriae produces the most severe form of shigellosis and may lead to HUS and kidney damage due to production of Shiga toxin.

9. Concerning dinoflagellates, which of the following is false

A.		One of them, Pfiesteriacauses skin ulcers and hemorrhages.
B.		None of the above is false.
C.		Ciguatera with severe symptoms that may last long periods of time is associated with consumption of coral reef fish with the dinoflagellate.
D.		Eating fish or shellfish that have ingested dinoflagellates often produces neurological effects in humans due to systemic infection, including replication in the brain, by the dinoflagellates.
		e. They are responsible for dense blooms called red tides 10. Which of the following is falseregarding mycoplasmas? A. Cause “walking pneumonia” and non-gonococcal urethritis (NGU) B. sterols in membrane. C. They are so small they can pass through bacterial filters. D. None of the above is false concerning mycoplasmas. E. Domain Bacteria, but lack peptidoglycan and cell wall.

Answer 1