The rose bushes in your garden have flat brown spots on thei…
The rose bushes in your garden have flat brown spots on their leaves that you suspect are due to an infection by Rosilla freckulus. Based on your knowledge of Koch’s postulates, what is the correct order of steps to be performed to prove that these bacteria are responsible for this plant disease. 1. Grow Rosilla freckulus in pure culture 2. Isolate Rosilla freckulus from all the diseased bushes 3. Reisolate Rosilla freckulus in pure culture 4. Reproduce the disease in the new hosts5. Inoculate undiseased rose bushes with Rosilla freckulus
Read DetailsCase Study 2: An 85-year-old male was admitted to the emer…
Case Study 2: An 85-year-old male was admitted to the emergency room of a New York City hospital suffering from breathing difficulties and coughing. He had a high fever, cough, and chest pain. He had presented to his local physician 3 days previously complaining of fever, headache, malaise, and pneumonia-like respiratory symptoms. A year ago he moved into a large long-term care facility after his wife died and he has been suffering from type two diabetes for the last thirty years. Sputum was collected for culture and sensitivity. A sputum gram stain indicated the presence of many white blood cells and pleomorphic gram-negative coccobacilli. The organism causing the infection did not grow on the traditional media for sputum culture. An additional urine specimen for antigen testing was then collected and sent to a reference laboratory to confirm the diagnosis. Case Study 2 Question 2: If he did not contract his illness from another patient, what is the likely mode of transmission?
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