CLINICAL MEDICINE

Detailed explanation-1: -Pathogens like to attack humans because they seek shelter. Though the human body is covered by the skin, pathogens can still enter through human tissues such as the ayes, nasal passages and respiratory tract, mouth and digestive tract, urinary tract and female genital tract.

Detailed explanation-2: -Pathogens cause illness to their hosts through a variety of ways. The most obvious means is through direct damage of tissues or cells during replication, generally through the production of toxins, which allows the pathogen to reach new tissues or exit the cells inside which it replicated.

Detailed explanation-3: -Entering the Human Host Microorganisms capable of causing disease-pathogens-usually enter our bodies through the mouth, eyes, nose, or urogenital openings, or through wounds or bites that breach the skin barrier.

Detailed explanation-4: -Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms.

Detailed explanation-5: -Mosquitoes, ticks and other biting arthropods, and the pathogens associated with them, causing arthropod-borne diseases, have always been the most dangerous enemies of mankind.