Worms
Worms
Worms (pronunciation: /wɜːrmz/) are elongated, soft-bodied invertebrates that are found in various environments. They encompass a diverse group of species from different phyla, including the Annelida, Nematoda, and Platyhelminthes.
Etymology
The term "worm" originates from the Old English word "wyrm" which was used to describe a serpent or dragon. Over time, the term evolved to refer to creeping or crawling invertebrates.
Types of Worms
There are several types of worms, each belonging to different phyla and exhibiting unique characteristics. Some of the most common types include:
- Earthworms - Belonging to the phyla Annelida, these worms are known for their segmented bodies and their role in soil aeration and decomposition.
- Roundworms - These worms, from the phyla Nematoda, are typically parasitic and can cause various diseases in humans and animals.
- Flatworms - From the phyla Platyhelminthes, these worms have a flattened body and include species such as tapeworms and flukes.
Medical Significance
Worms, particularly parasitic species, have significant medical implications. They can cause a range of diseases, collectively known as Helminthiasis, which can lead to malnutrition, organ damage, and other health complications. Some of the most common worm-related diseases include:
- Ascariasis - Caused by the roundworm Ascaris lumbricoides, this disease primarily affects the intestines.
- Trichinosis - This is caused by ingestion of undercooked meat contaminated with the larvae of a species of roundworm Trichinella spiralis.
- Schistosomiasis - Caused by a type of flatworm, this disease can lead to liver damage, kidney failure, and bladder cancer.
Prevention and Treatment
Prevention of worm-related diseases primarily involves good hygiene practices, safe food preparation, and in some cases, the use of preventative medication. Treatment typically involves the use of Anthelmintic drugs, which are designed to kill or disable parasitic worms.
External links
- Medical encyclopedia article on Worms
- Wikipedia's article - Worms
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