NEET BIOLOGY

Detailed explanation-1: -Giardia infection (giardiasis) is one of the most common causes of waterborne disease in the United States. The parasites are found in backcountry streams and lakes but also in public water supplies, swimming pools, whirlpool spas and wells. Giardia infection can be spread through food and person-to-person contact.

Detailed explanation-2: -Giardiasis is a contagious disease. When a person or animal infected with Giardia begins to have symptoms, millions of cysts are shed in their feces during a bowel movement. The shedding of the cysts can last for weeks after the symptoms stop. People can become infected after accidentally swallowing Giardia cysts.

Detailed explanation-3: -Giardia spreads easily and can spread from person to person or through contaminated water, food, surfaces, or objects. The most common way people get sick is by swallowing contaminated drinking water or recreational water (for example, lakes, rivers, or pools). Find answers to frequently asked questions about Giardia.

Detailed explanation-4: -Giardiasis is a diarrheal disease caused by the microscopic parasite Giardia duodenalis (or “Giardia” for short). Once a person or animal has been infected with Giardia, the parasite lives in the intestines and is passed in stool (poop). Once outside the body, Giardia can sometimes survive for weeks or even months.

Detailed explanation-5: -Causal Agent. Giardia duodenalis is a protozoan flagellate (Diplomonadida). This protozoan was initially named Cercomonas intestinalis by Lambl in 1859. It was renamed Giardia lamblia by Stiles in 1915 in honor of Professor A.