Pathogens in hostile terms can be defined as invaders that attack host organisms. Pathogens show different types of specificity or tropism. While many can attack a wide range of hosts, others are specific to one host. A human body is a preferable host for a wide variety of pathogens as it provides nutrient rich, warm and moist environment. Moreover the uniform temperature of the human body, allows the pathogen to survive and multiply itself, making it a desirable place. Emerging Infectious diseases by various pathogens had always been a matter of concern in the past and also at present. Despite the tremendous advancement in the diagnosis, treatment and prevention procedures, these infectious diseases still remain the leading cause of death around the world especially in developing countries. In this review, we made an attempt to discuss about some of the human pathogens like Human papillomavirus, Helicobacter pylori, Hepatitis, Mycobacterium tuberculosis and Plasmodium vivax, which are listed among the lethal microorganisms that frequently infect humans.
Pinky Sarmah, Meria M Dan, Dattatreya Adapa, Sarangi TK