Roundworms: Phylum Nematoda. Species in the phylum Nematoda (from the Greek root word nema meaning thread) are better known as the roundworms (Fig. 3.41). There are about 25,000 species of nematodes formally described by scientists.
How many animals are known as roundworms?
The number of named species is about 20,000, but it is probable that only a small proportion of the free-living forms have been identified. A great deal of research has been conducted on the parasitic forms because most of them have some medical, veterinary, or economic importance.
How many roundworms are there in the world?
There are 57 billion nematodes for every human on earth; Understanding them will help address climate change.
Which animal is known for roundworm?
Toxocara canis causes more significant disease and also may be transmitted to humans. Roundworms are the most common gastrointestinal worm found in the dog.
How common are roundworms?
How common are roundworms? Hundreds of millions of people around the world are infected with roundworms at any given time. But many of these parasites are uncommon in the United States. Americans may come into contact with them when traveling to certain countries.
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