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- Which of the following tests can be used to distinguish between group D streptococcus and other streptococcus bacteria? Mannitol Salt agar Coagulase test McConkey agar Bile eschulin agar Simmon's Citrate agarThe culture primarily contains nutrients such as sugars and a gel (agar). Why don’t viruses grow in a culture like bacteria do? Explain.An 18-year-old male went to the emergency room after experiencing intense and sudden headaches, vomiting, diarrhea, stiff neck, achy joints, and a skin rash. He was quarantined after telling his physician that he had recently taken care of a dead relative who suffered the same symptoms. The laboratory results are as follows: Direct Microscopic Examination: Diplococci that are pink after G/S SBA: medium-sized, gray, and convex that is mucoid Carbohydrate utilization test: Glucose (+); Lactose (-); Maltose (+) Platelet count: 7,000/uL Prothrombin time: 20 seconds Partial thromboplastin time: 38 seconds Fibrinogen level: 100 mg/dL D-dimer: 20,000 ng/mL QUESTION: What do you think is the medical condition of the patient? Justify
- An 18-year-old male went to the emergency room after experiencing intense and sudden headaches, vomiting, diarrhea, stiff neck, achy joints, and a skin rash. He was quarantined after telling his physician that he had recently taken care of a dead relative who suffered the same symptoms. The laboratory results are as follows: Direct Microscopic Examination: Diplococci that are pink after G/S SBA: medium-sized, gray, and convex that is mucoid Carbohydrate utilization test: Glucose (+); Lactose (-); Maltose (+) Platelet count: 7,000/uL Prothrombin time: 20 seconds Partial thromboplastin time: 38 seconds Fibrinogen level: 100 mg/dL D-dimer: 20,000 ng/mL 1. What do you think is the medical condition of the patient? Justify your answer.Staphlococcus epidermis appears ............ whereas Escherichia coli appears ........ after the Gram stain. a)blue;red(pink) b)red (or pink);purple c)orange;red(or pink) d)red(or pink);blue e)orange purpleA urine sample with more than 100,000 organisms is considered indicative of infection. A urine sample containing 500 bacteria with a generation time of 20 minutes sits for 6 hours before finally being assayed. How many bacteria will then be present within the sample?
- Samples from an ill patient were collected by a physician for testing. A bacterial infection is suspected. Using the unknown flowcharts, a microbiologist conducted various tests to determine the identity of the unknown bacterial isolate. The resulting data is included in this presentation. Identify each test.Microorganism Type of Microorganism Gram Stain Shape Tryptic Soy Agar McConkey Agar Blood Agar EMB Agar Mannitol Salt Agar Bacillus cereus Bacillus megaterium Bacillus subtilis Candida albicans Escherichia coli Micrococcus luteus Neisseria sicca Proteus vulgaris Pseudomonas aeruginosa Serratia marcescens Staphylococcus aureus Staphylococcus epidermidisThe below photograph shows a Gram-stained slide viewed using a light microscope set at brightfield of a clinical sample from a patient with symptoms suggesting an infection. The slide was viewed with x100 objective. What could be the most likely cause of infection? Gram positive bacteria, either rods or cocci Gram positive rod shaped bacteria or yeast Gram negative rod or cocci shaped bacteria Gram negative bacteria, either rods or cocci
- Which of the following methods is most sensitive for identifyingdifferent strains of a microbe?a. microscopic examination b. hemolysis on blood agar c. DNA analysis d. agglutination testIf a patient suspected to have sepsis or meningitis, samples for bacterial testing should be taken before giving antibiotics. Explain why?Abigail did not dry the top of her agar plate and stored it top up. Now she wants to count colonies but there is a smear over the entire plate. She was working with E. coli. Why does she have a smear?
