Sarathchandra, G.TANUVAS2018-11-022018-11-022018-09http://krishikosh.egranth.ac.in/handle/1/5810082773Any occurrence that causes damage, ecological disruption, loss of human life, deterioration of health and health services on a scale, sufficient to warrant an extraordinary response from outside the affected community or area - (WHO).en-USVeterinary ScienceAnimal Husbandry Extension EducationArticle