Common diseases in humans
1 .TYPHOID: Salmonella typhi is a pathogenic bacterium which causes typhoid fever in humans. These pathogen generally enter the small intestine through food and water contaminated with them and migrate to other organs through blood.Common symptoms of this disease are-Sustained high fever 39°Cto 40°C,weakness, stomach pain,constipation,headache and loss of appetit.Sometimes it become severe and causes intestinal perforating and death. 2.PNEUMONIA: Pneumonia is a disease caused by Streptococcus pneumoniae and Haemophilus influenzae .In humans they infect the alveoli(air filled sacs)of lungs.As a result of infection,the alveoli get filled with fluid leading to severe problems ij respiration. Symptoms of pneumonia include fever,chills coughs and headache. Sometimes lips and finger nails may turn grey to bluish in color . A healthy person acquires it by sharing utensils and glasses inhaling aresols/droplets released by infected one. 3.COMMON COLD: M...