HSCI 212 Lecture Notes - Lecture 2: Lysosome, Toxoplasma Gondii, Hand Sanitizer

• School: Simon Fraser University
• Department: Health Sciences
• Course: HSCI 212
• Professor: Nienke Van Houten

Document Summary

Some pathogens can"t be cultured in the laboratory. Diseases caused by a combination of pathogens and other cofactors (+environment) Ethical considerations prevent applying koch"s postulates to pathogens that require human. Diseases can be caused by more than one pathogen. Pathogens that are ignored as potential causes of disease: explain the basis for a common naming system used for bacteria. Often named based on their shape (morphology: staphylococcus = grape-like cluster; vibrio = comma shaped, explain the importance of endospore formation and its role in transmitting infectious diseases. Endospores are resistant forms that allow them to survive in harsh environments; problem for disinfection and in food microbiology; highly resistant to heat/drying and chemicals: explain the difference between horizontal and vertical gene transfer. Vertical: parent to offspring; horizontal: peer to peer, major mode of spread in bacterial populations: list four environmental factors that affect bacterial growth. Food preservation: define virus and compare an enveloped to a naked virus.