西北农林科技大学：《家畜解剖学及组织胚胎学》课程PPT教学课件（解剖学部分）结缔组织

American Legion Convention in 1976 in Philadelphia hotel – Respiratory distress and fever – 200 affected – 34 died

General Aspects Ecology – Found throughout the environment Very simple nutritional requirements – Not usually in normal flora unless hospitalized or immunocompromised

Diversity of species Ecology – Found worldwide in soil, water, vegetation, and microbial flora of animals and humans – Some are always associated with disease

Comparison of Meningococcus and Gonococcus Pathobiology Similarities: – Both diploccocci – Share about 80% DNA – Neither makes exotoxin; both make endotoxin – Both are relatively good colonizers

Staphylococci Important human pathogen – Causes both relatively minor and serious diseases One of the hardiest of the non￾sporeforming bacteria – Can exist on dry surfaces for a long period – Relatively heat-resistant; temperature range

Production of Ab and Activation of Macrophages and Cytotoxic T Cells T-Dependent T-Independent

Definition – Soluble substances that alter normal metabolism of host cells with deleterious effects on the host Host range – Known for bacteria, but possible that they play a role in diseases caused by fungi

第一节、 果树种质资源的考察 第二节、 果树种质资源的收集 第三节、 果树种质资源的保存

第一节 落叶果树的起源中心 第三节 落叶果树的分布 第二节 落叶果树带的划分