Microbiology 171 Module #5 Study Guide Questions and Answers, Exams of Microbiology

Download Microbiology 171 Module #5 Study Guide Questions and Answers and more Exams Microbiology in PDF only on Docsity! Microbiology 171 module #5 study guide Questions And Answers Grade A+ - Universal precautions - correct answer 1.) The concept of treating all samples, whether known or unknown, as potentially hazardous (or pathogenic) material is known as _______ (3 pts)? - Size and shape - Any observable motility - Gram status (positive or negative) - The presence of any chemical reaction - Change in color localized to the organism or the surrounding media - Capture (or drawn) images of any of the characteristics described above - correct answer 2.) List at least 3 observations a researcher would be sure to note while assessing an unknown microbial sample (3 pts). - Carbohydrate composition of antigens; present in the cell wall determines the Lancefield groupings (A, B, C, etc.). Note ALL strep under Lancefield groupings are (by definition) catalase negative and beta hemolytic. Thus, answer A and C cannot be used to subdivide streptococcal species. Microbiology 171 module #5 study guide Questions And Answers Grade A+ - correct answer 3.) The distinction of Lancefield subgroupings lies in its: (select all that apply) (2pts). - Rheumatic fever; beta - correct answer 4.) Left untreated, strep throat can progress to _____, which displays_____ hemolytic activity (2 pts). - beta &Strep. Pharyngitis; Strep throat (also known as strep. Pharyngitis) can lead to rheumatic fever if left untreated and displays a beta-hemolytic activity. - correct answer 5.) Rhematic fever displays _____hemolytic activity and occurs when ______ is left untreated (2pts). - False; while staphylococcus can be found in ~ 30% of the human population; it remains non-symptomatic. - correct answer 6.) True or False: Under most circumstances, staphylococcus can be found in ~ 30% of human populations where it remains pathogenic (2 pts). Microbiology 171 module #5 study guide Questions And Answers Grade A+ determine its motility status. Next, the same liquid culture can be heat fixed and Gram stained. - correct answer 12.) While observing an unknown sample of limited amounts, a researcher must determine the following observations: (1) presence of any motility, and (2) its gram status using the same sample—the liquid sample cannot be divided. Which would you determine first and why (10pts)? - Attachment (pathogen finds a specific target tissue and adheres) - Evasion (Pathogen masks its own antigens to hide from the host's immune system) - Entry (utilization of a portal to gain access to host tissues) - correct answer 13.) Match the step of infection to its description (3pts). - Folliculitis; D. Pus-filled lesions on skin or hair - Scalded-skin syndrome; E. Ruptured pustules; treated with penicillin Microbiology 171 module #5 study guide Questions And Answers Grade A+ - Impetigo; A. Childhood skin disease near the mouth/nose. - Conjunctivitis; B. Infection of thin, transparent scleral tissue - Ophthalmia neonatorum; C. infection occurs at the time of birth - correct answer 14.) Match the following diseases with their respective symptoms (5pts). - Commensal - correct answer 15.) When a bacterium neither harms nor benefits from the host from which it obtains nutrients, it is referred to as being _______ (3 pts). - True - correct answer 16.) True or False: Only directly ingesting the pre-formed clostridium toxin (neither the bacteria nor its spores) will cause disease in adults (2 pts). - True; Microbiology 171 module #5 study guide Questions And Answers Grade A+ Although the symptoms can be treated it is only to manage the discomfort not to cure. - correct answer 18.) True or False: Directly ingested clostridium or its associated spores will not cause illness in adults (2 pts). - True; There is not a cure for tetanus, however, tetanus is entirely preventable through vaccination. - correct answer 19.) True or False: Although there is no cure for tetanus, it can be prevented through vaccination (2pts). - Staphylococcus species are capable of growth in the present of bile salts. - correct answer 20.) How can staphylococcus be differentially tested (short answer)? - Bile salts - correct answer 21.) In order to differential screen staphylococcus species, agar plates should contain what additive? Microbiology 171 module #5 study guide Questions And Answers Grade A+ D. Hansen's disease - True - correct answer 28.) True or false: Acid-Fast staining is best suited to identify tuberculosis (as opposed to a gram stain) (2pts). - False; Mycobacterium show poor Gram staining and should be screened via an acid-fast stain. - correct answer 29.) True or False: Tuberculosis is best identified by a gram stain (2pts). - Group A - correct answer 30.) Greater than 90% of all human streptococcal infections belongs to (multiple choice)? - Lyme disease - correct answer 31.) What disease has bullseye rash? - False - correct answer 32.) True or False: Chlamydia is an obligate parasite and as such can be grown on agar plates alone (2pts) Microbiology 171 module #5 study guide Questions And Answers Grade A+ - Infant. Although food (honey).], is consumed, foodborne botulism is derived from improperly canned, low acid foods under anaerobic condition. Such conditions were not described. No puncture wound or injuries were described, ruling out wound. The child is suffering from infant botulism, as honey is a potential carrier of clostridium. The intestinal track of young children is still developing, and clostridium is able to colonize and produce the associated toxin. - correct answer 33.) A 5-month-old child is given honey at breakfast and begins showing symptoms consistent with botulism. Would the child's illness be classified as foodborne, infant or wound botulism? Explain why you chose this answer (10 pts). - Gram-negative spirochete - correct answer 34.) Syphilis is caused by (multiple choice)? - Septicemic plague is most rare, and it targets the blood system. - correct answer 35.) Which form of the plague is the most rare? What does it target? - Gas Gangrene. Microbiology 171 module #5 study guide Questions And Answers Grade A+ Which is caused by Clostridium perfringes - correct answer 36.) The alpha toxin perfringolysin is associated with which medical condition caused by gram positive anaerobic bacteria (pts)? - Foodborne botulism. The child is too old (> 6 months) to be considered infant botulism and wounds were not present. The green beans were likely improperly canned and under the low-acidic, anaerobic conditions, bacterial growth was encouraged. - correct answer 37.) While visiting his grandparents, a 10-year-old child has green beans for dinner that were harvested from his grandparent's garden and canned the previous year. Severe illness sets in, and the child is taken to the hospital Botulism is suspected, what form (short answer)? - Clostridium perfringens presents with muscle necrosis, swelling of infected areas, fever, and intense gas production. Treatment entails removal of all infected tissue, often resulting in amputation of the affected areas, in conjunction with heavy antibiotic therapies. - correct answer 38.) Describe the symptoms and treatment regimen for someone