Changes

[[Image:Soybean cyst nematode EM.jpg|thumb|right|150px|Soybean Cyst Nematode and Egg, Scanning Electron Micrograph - Wikimedia Commons]]

[[Image:Soybean cyst nematode EM.jpg|thumb|right|150px|''Soybean Cyst Nematode and Egg, Scanning Electron Micrograph'' - Wikimedia Commons]]

The term helminth is commonly used to describe parasitic worms, all with eukaryotic cell structures. The two main groups are the '''Nematodes''' (roundworms) and the '''Platyhelminthes''' (flatworms).

The term helminth is commonly used to describe parasitic worms, all with eukaryotic cell structures. The two main groups are the '''Nematodes''' (roundworms) and the '''Platyhelminthes''' (flatworms).

**Pork worm- found worldwide, pork worms can infect most carnivorous animals, causing trichinosis.  

**Pork worm- found worldwide, pork worms can infect most carnivorous animals, causing trichinosis.  

**Filarial worms- various species found in tropical and subtropical areas depending on distribution of insect vectors, causes allergic reactions and potentially blindness

**Filarial worms- various species found in tropical and subtropical areas depending on distribution of insect vectors, causes allergic reactions and potentially blindness

*'''Platyhelminthes'''[[Image:Tenia solium scolex.jpg|thumb|right|100px|Scolex, with hooks, of ''T. solium'' tapeworm]]

*'''Platyhelminthes'''[[Image:Tenia solium scolex.jpg|thumb|right|100px|''Scolex, with hooks, of T. solium tapeworm'' Hubert 1891, WikiMedia Commons]]

**Trematodes- commonly known as the 'flukes,' trematodes are non-segmented and have alternate sexual and non-sexual generations in different hosts. They are mostly hermaphroditic except the blood flukes, which are dioecious.

**Trematodes- commonly known as the 'flukes,' trematodes are non-segmented and have alternate sexual and non-sexual generations in different hosts. They are mostly hermaphroditic except the blood flukes, which are dioecious.

**Cestodes- commonly known as the 'tapeworms,' these consist of an enlarged head section ('scolex'), with suckers or hooks for attachment in the intestine and successive flat segments forming a chain of 'proglottids'

**Cestodes- commonly known as the 'tapeworms,' these consist of an enlarged head section ('scolex'), with suckers or hooks for attachment in the intestine and successive flat segments forming a chain of 'proglottids'