final (2) LSUE Micro Lecture Dr al

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final (2) LSUE Micro Lecture Dr al which of the following statements about staphyloccal food poisoning is false? - ✔✔it can be prevented by boiling food for 5 mins microscopic examination of a ... patients fecal culture shows spiral bacteria. the bacteria probably belongs to to the genus - ✔✔camplyobacter clostridium perfringens causes both clostridial food poisoning andq - ✔✔Gas gangrene malta fever is caused by a - ✔✔gran (-) rod, Brucella abortus An aerobic gram (+) sporeformer that causes food poisoning is - ✔✔bacillus cereus Most food fall in a pH range of - ✔✔5-7 the bacterial limit for pasteurized Grade A milk is - ✔✔20,000/ML the disease caused by streptococcus mutans is - ✔✔dental caries bacterial intoxications differ from bacterial infections of the digestive system in that intoxications - ✔✔have shorter incubation time. sludge digestion - ✔✔takes place under anaerobic conditions coliforms and fecal coliforms are often differenciated based on there responce to - ✔✔temperature which of the following sequences is used in the purification of water - ✔✔flocculation,filtration, chlorilination Ascaris lumbricoides - ✔✔the largest intestinal nematode and the cause of roundworm disease a fever that often is high in the daytime and low in the evening is assciated with brucelosis - ✔✔uadulant fever which of the following does not always require the presence of living bacteria - ✔✔all of the choices the time required for a milk sample to change color of added methylene blue is the basis for the - ✔✔reductase test lactose is - ✔✔dissacharide that can be digested by only a relativly few bacteria an influenza like disorder transmitted in raw milk caused by - ✔✔coxiella burnetii In the standard plate count method, plates used to determine the bacterial count should have______ colonies. - ✔✔30-300 grade a pasteurized milk may have no more than - ✔✔20000 total bacterial and 10 coliforms which of the following does not produce a gastrointestinal disease due to an exotoxin - ✔✔shigella dysenteriae in the lower region of the small intestine, entamoba histolytica - ✔✔all of the choices which of the following will not preserve foods - ✔✔microwave an organism that can survive and grow at refreigerator temperatures is termed - ✔✔psychrotrophillic foods that spoil at intermidiate rate are termed - ✔✔semi perishable ropy is a condition of - ✔✔associated with the growth of bacillus in bread the protien that gives milk its white color is - ✔✔casein e coli is most probably found in a - ✔✔polluted water enviroment The addition of untreated sewage to a freshwater lake would cause the biochemical oxygen demand to: - ✔✔increase a graft bewtween different species is called a - ✔✔xenograph all of the following statments about type IV hypersensitives are true except - ✔✔they can be passively transferred with serum hemolytic disease of the newborn - ✔✔a Rh-mother witha Rh + fetus the primary lesion of tuberulosis is usually a - ✔✔pulmonary amoebic dysentery and bacillary dysentery differ in the - ✔✔etiologic agent the bacterial species responsible for cholera is - ✔✔a member of the spiral or curved bacteria the total coliform limit for drinking water is - ✔✔less than 1/100ML water ecosystems become eutropic when there is - ✔✔nutrient enrichemnt of waters removal of giardia llamblia from municialpal water supplies involves the use of - ✔✔slow sand filter Several pathogenic organisms are associated with foods. These include typhoid bacilli, amoebic cysts, and hepatitis viruses. All of these causative agents of disease may accumulate in A. beef B. shellfish, such as clams C. salami D. dairy products E. eggs - ✔✔shellfish , such as clams the most common cause of epiidemic waterborne diarrheal disease is - ✔✔giardia intestinalis in additon to IGG the antiboides that can fix the commpliment are the I - ✔✔IGM the most abundant calss of antibodies in serum is - ✔✔IGG the best definition of anitbody - ✔✔a protein made in responce to an antigen that can combine with that antigen the souring of milk can be caused by - ✔✔Streptocccucs spp. Which of the following is NOT considered a type 1 hypersinsitivity? - ✔✔transplant rejections what type of immunity results from transfer of antibodies from one individual to a susecptible individual by means of injection - ✔✔artifically acquired passive immunity autoimmunity is due to - ✔✔IgG and IgM antibodies [Show More]

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