Description

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful, but under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person. Some are transmitted by bites from insects or animals. And others are acquired by ingesting contaminated food or water or being exposed to organisms in the environment. The objective is to introduce to students the essential principles for understanding various aspects of diseases. Most of the diseases constitute the largest part of human pathology and are the primary cause of death. Hence, special importance is given to the study of such diseases. The book is intended to acquaint students of various fields involved directly or indirectly with the major principles of human diseases. This book may be helpful to practitioners and those engaged in medical research.