SAS 13 Lecture Notes - Lecture 7: Biological Pest Control, Entomopathogenic Fungus, Bdellovibrio
Document Summary
Koch"s postulates identify what causes disease: consistent association of microbe with symptoms. Inoculate to reproduce symptoms: re-isolate to reproduce symptoms. Anthrax -disease affecting animals and humans: resista(cid:374)t spores, (cid:272)a(cid:374)"t (cid:271)e killed (cid:271)y (cid:271)oili(cid:374)g (cid:449)ater, triggered by climate change, bacteria toxins will kill host tissues -> spread throughout circulatory system. Infection pathways inhaled, entry in wound, digestion. Inoculated chicken with old culture of cholera bacterium: remained healthy. Inoculated chick with fresh culture: remained healthy, chickens were immune to cholera because they were already exposed through the old culture, created vaccine, challenged host with an attenuated strain of the pathogen. Martinus beijerink discovered tobacco mosaic disease: used pasteur (cid:272)ha(cid:373)(cid:271)erlai(cid:374) filter: (cid:271)a(cid:272)teria (cid:272)a(cid:374)"t pass through, discovered that infectious agent was smaller than the bacteria. Papaya ringspot virus 1950: no control measures, no genetic resistance, pesticides not effective against aphid vector, crop rotation not economical and practical, quarantine failed.
