Mycobacterium avium-intracellulare (MAI) is prevalent in AIDS patients. In an effort to determine the source of this infection, hospital water systems were sampled. The water contained chlorine. 2. Percentage of samples with MAI Hot Water Cold Water February June 88% 50% February June 22% 11% A. What is the usual method of transmission for MAI? В. What is the probable cause of infection in hospitals?
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- As an illustration, a patient undergoing a laparoscopic-assisted vaginal hysterectomy (LAVH) procedure under general anesthesia might be happier not to know the numbers of portals of entry for potential transmission of pathogenic microbes to which she will be subjected. The anesthesia provider would be accessing the patients airway and vascular system by an IV line. Which portals of entry will the surgeon be accessing?An iatrogentic disease in a patient caused by Staphylo-coccus aureus–contaminated surgical instruments would beknown as a__________________.(a) Zoonotic invasion(b) Transient contamination(c) Invasive malignancy(d) Subclinical infection(e) Nosocomial infectionAn outbreak of Methicillin-resistant Staphylococcus aureus (MRSA) in the surgical ward at the hospital forces the hospital administrator to cancel and postpone all non-essential surgeries until the source of infection has been located and for measure put into place. Bacterial samples obtained from swab of wad staff equipment and surfaces arr brought to the lab for analysis. 1. What testing method will you employ to determine the level of exposure? 2 How would a positive test present? 3. How would a negative test present? 4. What recommendations would you make in your report?
- Several persons working in an exercise gym acquired an acute diseasecharacterized by fever, cough, pneumonia, and headache. Treatmentwith erythromycin cleared it up. The source was never found, but anenvironmental focus was suspected.a. What do you think might have caused the disease?b. People in a different gym got skin lesions after sitting in aredwood hot tub. Which pathogen could have caused that?1. what tests (i.e staining and/or microscopic test etc) can be used on the disease causing organism below that can help draw a flow chart or ditochomy key? Cryptococcal Meningitis , Endocarditis, Anaplasmosis, West Nile Arboviral Encephalitis, Impetigo & Erysipelas, Lyme Disease, Gas gangrene, Pork Tapeworm infestation, Tuberculosis, Bacterial UTIOn the other hand,a patient who passes of mucoid-stool is suspected of; a.cholera b typhoid fever c shigellosis d amoebasis Which among the following diseases has the incubation period of 7hours to 7 days? a.shigellosis b cholera c. amoebiasis d.typhoid fever The main vector of genus Leptospira is; a rat b rabbit c pig d chicken
- Which of the following statements is incorrect? a. Mucosal surfaces are better than skin surfaces at supporting colonization by commensal microorganisms. b. The skin provides a larger surface area than mucosal surfaces for commensal microorganisms. c. There are ten times as many bacteria residing in the intestinal tract than the number of cells in the human body. d. It is common for commensal bacteria to live in symbiosis with their human hosts. e. During gestation in mammals, a fetus does not have any commensal microorganisms on their skin or mucosal surfaces.An elderly man with infl uenza acquires a case of pneumonia. Gram-positive cocci isolated from his sputum give betahemolysis on blood agar; the infection is very diffi cult to treat. Later, it is shown that the man shared a room with a patient with a bone infection. Isolates from both infections were the same. a. What is the probable species? b. Justify your answer. c. What treatment will be necessary? d. What special precautions should be taken by persons attending to the patient? Why?Three to five days after eating Thanksgiving dinner at a restaurant, 112 people developed fever and gastroenteritis. The dinner consisted of Roast Turkey, turkey giblet soup, mashed potatoes and crushed giblet gravy. The gravy was not refrigerated and was served the entire Thanksgiving day. The analysis of leftover food showed the same bacteria as was isolated from patients. a) What was the source of illness? b) What was the most likely microbe causing this illness? c) Was this an infection or an intoxication?
- Which factors would promote progression of an infection? Select all that apply. a. low microbial virulence b. increased percentage of optimal infectious dose c. correct portal of entry d. genetic profi le of host resistance to microbe e. no previous exposure to this infection f. decreased level of overall healthA likely factor involved in the recent emergence ofnosocomial Clostridium difficile infections is:(a) Resistance of Clostridium to alcohol-based handsanitizers(b) Relative decrease in nosocomial staphylococcalinfections(c) Increase in the popularity of home canning(d) Increase in contamination of hospital food(e) Increase use of probioticsHeroin addicts have a high incidence of Clostridium tetaniinfections. Discuss the reasons for the development of this typeof infection in these IV drug users.