Psorosperm
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Psorosperm (from the Greek ψωρα itch and σπερμα seed) is a former name of a number of parasitic protozoa that produce cystlike or sporelike structures in the tissue of hosts. The term is now essentially obsolete.
- Some that affect vertebrate hosts are now called coccidia.
- Others, such as the cause of pébrine in silkworms, are now recognized as microsporidians, and some are myxosporidians.
- The genus Psorospermium (which includes the species Psorospermium haeckeli) itself is a parasite of crayfishes, and belongs to an enigmatic group of unicellular organisms that some biologists think may be related to the common ancestors of animals and fungi.[1]
J. Müller introduced the term in German (as Psorospermien) in 1841.[2][3]
Psorosperm was at one point believed to be the cause of Darier's disease.[4][5]
"Psorospermiasis" is classified under 136.4 in ICD-9.[6]
References
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- ↑ Müller J. 1841: Über Psorospermien. Arch. Anat. Physiol. Wissensch. Med. 5: 477–496
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- ↑ F. J. Darier. De la psorospermose folliculaire végétante. Étude anatomo-pathologique d'une affection cutanée non décrite ou comprise dans le groupe des acnés sebacées, cornées, hypertrophiantes, des kératoses (ichtyoses) folliculaires, etc. Annales de dermatologie et de syphilographie, Paris, 1889, 10: 597-612.
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