Symbioses Commensalism: one partner benefits and the other is neither harmed nor benefited. Mutualism: both partners benefit. Parasitism: one partner benefits at the expense of the other

Bacterial genomics Organisation Linear chromosomes Borrelia burgdorferi Streptomyces coelicolor Multiple chromosomes Vibrio cholerae Plasmids Borrelia burgdorferi

Bacteriophages ( phages ) are obligate intracellular parasites that multiply inside bacteria by making use of some or all of the host biosynthetic machinery . They are viruses that infect bacteria

The process of destroying all microbial forms. A sterile object is one free of all microbial forms, including bacterial spores

Bacterial chemical components Water: free water and compound water. Inorganic salt: phosphus, potassium magnesium,calcium, nitrium,etc. Protein: 50%-80% of dry weight accordingbacterial kinds and age. Sugar: mainly distributing in cell wall andcapsule. Lipids: composed of lipid, fatty acid, wax, etc. Nucleic acid: RNA and DNA

SIZE OF BACTERIA Unit for measurement : Micron or micrometer,μm: 1μm=10-3mm Size: Varies with kinds of bacteria, and also related to their age and external environment

Medical Microbiology and Parasitology Part I: Medical Microbiology Part II: Medical Parasitology

1、甲状腺大部切除术后最危急的并发症是术后呼吸困 难和窒息。 2、阑尾炎的临床病理分型主要为：①急性单纯性阑尾 炎，②急性化脓性阑尾炎，③坏疽性及穿孔性阑尾炎， ④阑尾周围脓肿

一、选择题：（每题 2 分、共 30 分） 1、高渗性缺水早期主要症状是： A、口渴 B、眼眶凹陷 C、血压下降 D、乏力 E、谵妄

二、 填空题（每题 1 分，共 15 分） 1、甲状腺大部切除术后最危急的并发症是术后呼吸困 难和窒息