Portage Microbiology BIOD171 Exam 5

A facultative anaerobe is a microorganism capable of growth under what conditions? - A facultative anaerobe is capable of growth under aerobic (with oxygen) and anaerobic (without oxygen) conditions. As Streptococcus is catalase negative would it thrive or die in the presence of peroxides? Why? - Streptococcus is catalse negative which means it cannot break down peroxides and if any peroxides are present it would die. Attachment - pathogen finds a specific target tissue and adhere Define the concept of universal precautions. - Universal precautions means any and all samples, whether known or unknown, are to be treated as potentially hazardous (or pathogenic) materials. entry - utilization of a portal to gain access to host's tissues evasion - pathogen masks its own antigens to hide from the host's immune system Identify the disease based on the following (select all that apply): It is a small, acid-fast rod usually remaining asymptomatic for up to 20 years. It affects the skin, nerves, upper respiratory tract, and eyes of infected individuals. Scalded-skin syndrome Bacterial conjunctivitis Leprosy Hansen's disease Tuberculosis - Leprosy Hansen's disease B and D. Hansen's disease is simply another name for Leprosy. Leprosy is characterized by its ability to remain dormant for up to 20 years as well as the effects observed relative to the patients skin, nerves, lungs and eyes. Identify the following disease: - Anthrax—the distinct black center at the site of infection is a hallmark of anthrax infection. Identify the medical condition characterized by robust carbohydrate fermentation, swelling of the infected areas, and fever. Explain why hyperbaric oxygen therapy is a possible treatment. - Gas gangrene, because C. perfringens is an anaerobic bacteria