WATER BORNE DISEASES: ‘A GRADUAL AND INSTANT KILLER’
Water is a universal solvent capable of dissolving a variety of different substances. Improving health …begins with access to safe Water.
Did you know that half of the world’s hospital beds are filled with people suffering from a water-related disease? In developing countries, about 80% of illnesses are linked to poor water and sanitation conditions. 1 out of every 5 deaths under the age of 5 worldwide is due to a water-related disease. Clean and safe water is essential to healthy living.
Every glass of dirty water is a potential killer, diseases such as typhoid fever, and many other diseases still run rampant in the developing parts of the world. Commonest diseases are as follows;
Untreated drinking water and faecal contamination of water is the major cause of diarrhoea. Fever, abdominal pain, nausea, headache are major symptoms of diarrhoea. Vibrio cholerae is the organism responsible for the cholera disease which is also caused by the contaminated water. This bacterium produces toxins in digestive tracts. The symptoms of this disease are watery diarrhoea, nausea, vomiting and watery diarrhoea leads to dehydration and renal failure.
Shigellosis is a bacterial disease caused by Shigella bacteria. It affects the digestive tract of humans and damages the intestinal lining. Watery or bloody diarrhoea, abdominal cramps, vomiting and nausea are symptoms and it can be cured with antibiotics and good hygienic practice.
Typhoid and paratyphoid caused by Salmonella typhi and Salmonella paratyphoid respectively are symptomatic; in enteric fever they are acute, inflammation of intestine and often death occurs. The main sources of infection are contaminated water or milk and, especially in urban communities, food handlers who are carriers. Their germs are passed in the faeces and urine of infected people. People become infected after eating food or drinking beverages that have been handled by a person who is infected or by drinking water that has been contaminated by sewage containing the bacteria.
Hepatitis is a viral disease caused by contaminated water and infects the liver. Jaundice, loss of appetite, fatigue, discomfort and high fever are symptoms of hepatitis. If it persists for a long time it may be fatal and results in death. Encephalitis is inflammatory disease spread by bite of infected mosquitoes. Culex mosquito lays their eggs in contaminated water. Most people don’t show any symptoms but some symptoms are headache, high fever, muscle stiffness, convulsions however in severe cases coma and paralysis results. Poliomyelitis virus is responsible for poliomyelitis. Sore throat, fever, nausea, constipation and diarrhoea and sometimes paralysis are symptoms of poliomyelitis. Gastroenteritis is caused by different viruses including rotaviruses, adenoviruses, calciviruses and Norwalk virus. Symptoms of gastroenteritis are vomiting, headache and fever. Symptoms appear 1 to 2 days after infecting. Sickness can be dangerous among infants, young children and disabled person.
Cryptosporidiosis is a parasitic disease caused by the Cryptosporidium parvum. It is worldwide disease and symptoms are diarrhoea, loose or watery bowls, stomach cramps and upset stomach. Cryptosporidium is resistant to disinfection and affects immune system and it is the cause of diarrhoea and vomiting in humans. Galloping amoeba is caused by the Entamoeba histolytica and affects stomach lining. This parasite undergoes cyst and non-cyst form. Infection occurs when cyst found in contaminated water is swallowed. Symptoms are fever, chills and watery diarrhoea. According to WHO, diarrheal cases are about 4 billion and results in 2.2 million deaths. Giardiasis is caused by Giardia lamblia. Cells of intestinal lining may become injurious. Giardia is resistant to wintry temperature and disinfectant. Sometimes it is known as travelers’ disease. People suffering from giardiasis have symptoms bloating, excess gas, watery diarrhoea and weight loss.
Source: Allied Academies (Courtesy: Mehtab Haseena et.al, 2017: Water pollution and human health, Environmental Risk Assessment and Remediation (2017) Volume 1, Issue 3), WHO, The Water Project.