parasitosis
noun
par·a·sit·o·sis
ˌper-ə-sə-ˈtō-səs 
-ˌsī-,
ˌpa-rə-
plural parasitoses
ˌper-ə-sə-ˈtō-ˌsēz
-ˌsī-,
ˌpa-rə-
: infestation with or disease caused by parasites
Examples of parasitosis in a Sentence
Recent Examples on the Web
Morgellons disease, a form of delusional parasitosis, is a contested condition in which people are thought to have a false belief that they are infected by parasites, mites, worms or other organisms, despite testing suggesting the contrary, according to the Mayo Clinic.
—
Taijuan Moorman, USA Today, 5 Aug. 2025
Secondary delusional parasitosis might occur with substance abuse disorder.
—Korin Miller, Health, 17 Nov. 2023
The misguided belief that one’s body is being overrun by worms also has a name: delusional parasitosis.
—NBC News, 14 Nov. 2019
Patients with dermatological parasitosis have delusions that insects are walking on or crawling through their skin.
—Amy Barth, Discover Magazine, 14 Nov. 2019
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Taijuan Moorman, USA Today, 5 Aug. 2025
Secondary delusional parasitosis might occur with substance abuse disorder.
—Korin Miller, Health, 17 Nov. 2023
The misguided belief that one’s body is being overrun by worms also has a name: delusional parasitosis.
—NBC News, 14 Nov. 2019
Patients with dermatological parasitosis have delusions that insects are walking on or crawling through their skin.
—Amy Barth, Discover Magazine, 14 Nov. 2019
Cite this Entry
“Parasitosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/parasitosis. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
parasitosis
noun
par·a·sit·o·sis
-sə-ˈtō-səs
-ˌsīt-ˈō-
-ˌsīt-ˈō-
plural parasitoses
-ˌsēz
: infestation with or disease caused by parasites
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