POSC 201 Exam 3 Review.docx - POSC 201 Exam 3 Review...

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POSC 201 Exam 3 Review Definitions Disease- any impairment of normal physiological function Pathogen- any disease-producing agent, esp. a virus, bacterium, or other microorganism Vaccine- any preparation of weakened or killed bacteria or viruses introduced into the body to prevent a disease by stimulating antibodies against it. Hi Path- capable of producing high levels of mortality and morbidity to the hosts Lo Path- generally creates little or no disease Virulence- the capacity of a microorganism for causing disease Morbidity-The rate of incidence of a disease, sickness Mortality- death Etiology- cause of disease Infectious- disease produced by living organisms, most infectious diseases are contagious Attenuated vaccine - vaccine created by reducing the virulence of a pathogen, (weakened but live) Prevention is KEY! Break even since treatment is costly Agents of disease Pathogens Nutritional deficiencies Poor environment (crowding, wet litter, bad ventilation etc) Minimize loses by: 1). Proper vaccination 2). Good bio-security program 3). Good bird management practices, all in all out where possible. Otherwise travel young to old. 4). Proper house ventilation 5). Buy disease free birds from genetically resistant stocks. (NPIP) certified. Stress factors- chilling, overcrowding, poor feed and water or ventilation Direct factors Bacteria- toxin (clostridia) Virus- avian flu

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