The world entered into 20th century with only one drug “aspirin”. Then there were discoveries and development of drugs like chloroquine, streptomycin, isoniazid, oral contraceptive pills (OCPs), anti-diabetics, cardiovascular drugs (CSVs), etc. The concept of Essential Medicines arose from countries like Sri Lanka, Tanzania and Cuba. Essential medicines are simply drugs used for treating widespread health problems.
WHO Definition of Essential …

Adaptations are reversible changes in the number, size, phenotype, metabolic activity or functions of cells in response to the changes in the environment. The types of cellular adaptations are:
1. Hypertrophy: Hypertropthy refers to an increase in the size of cells, resulting in an increase in the size of the organ.
a. No new cells are formed; just larger cells enlarged by increased amount …

Waterborne diseases

Cause of Waterborne Disease

Waterborne diseases are caused by pathogenic microorganisms which are directly transmitted when contaminated drinking water is consumed. Contaminated drinking water, used in the preparation of food, can be the source of foodborne disease through consumption of the same microorganisms. According to the World Health Organization, diarrheal disease accounts for an estimated 4.1% of the …