ASCP Microbiology Exam Practice Questions and Answers

Gemella Gram positive diplococcus. Thrive best at high partial carbon dioxide pressure. Facultative anaerobe. Oxidase negative. Catalase negative. In mucous membranes of humans and animals and upper digestive tract. Leuconstoc Gram positive cocci often in chains. Intrinsically resistant to vancomycin. Catalase negative. Are generally slime forming. Responsible for cabbage fermentation. Acanthamoeba A genus of amoeba One of the most common single celled eukaryotes in soil and frequently in fresh water. Has two forms - metabolically active trophozoite. Dormant - stress resistant cyst. Causes keratitis and granulomatous amoebic encephalitis. Naegleria fowleri Protozoa. Causes Primary Amoebic Meningoencephalitis. Enter through the nose and travels to the brain. Commonly found in warm fresh water. Only species that infects humans. Almost always results in death. Schistisoma Also known as the blood flukes. Schistisoma mansoni Blood fluke most commonly found in Africa, South America, West Indies and Porto Rico. Lives in the large intestines. Approximately 115-175 micrometers by 45-75 micrometers. Lateral spine. Schistisoma heamatobium Blood fluke most commonly found in Nile Vally, Mideast and East Africa. Live in veins surrounding bladder. Approximately 110-170 micrometers by 40-70 micrometers. Terminal spine.