BIOS 111 Chapter Notes - Chapter 23: Freeze-Drying, Interrupt, Thymine
Document Summary
Bios111 textbook notes for lecture 23: tomorrow/wednesday we will finish high temperature effects (181-189/176-184), canning (800-801/795-796), followed by microwaves (190/185), and high pressure sterilization (189/184 and 804/798). Then the dod will be listeria monocytogenes (619-621/611-613). You think about l. monocytogenes as a robust foodborne pathogen. Infected adults: mild, often symptomless, microbe sometimes invade cns, causing meningitis, people whose immune systems are compromised, cancer, aids, etc, can invade bloodstream and cause sepsis, shed pathogen in feces. Infected fetus/newborn: can wait to manifest until weeks after birth, cause meningitis, results in brain injury or death. Infant mortality 60: frequently foodborne, deli meats, dairy products, grows at refrigerator temperatures, diagnosis. Industrial food canning: commercial sterilization steam under pressure in large retort operates like autoclave, destroys c. botulinum, 12d treatment theoretical population of c. bot would be decreased by. Ionizing radiation gamma rays, x rays, high energy electron beams: shorter wavelength, carries more energy.
