Macroparasite
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Macroparasites are parasites that are large enough to be seen with the naked eye, in contrast to microparasites. These generally include ticks, mites, nematodes, flatworm, etc., and can be either external parasites (ectoparasitic) or internal parasites (endoparasitic). The most abundant macroparasite in humans is ascaris lumbricoides-a nematode. Up to 2000 of these nematodes can be found in a single human[citation needed]. Macroparasitic infection results in around 100,000 deaths a year, most of which are in South America, Southeast Asia, and Africa[citation needed]. Macroparasites are also parasitic of many plant species and can be a significant agricultural pest.