Calcification of Trichinella spiralis larval capsule

Abstract

Trichinella spiralis larvae were examined in TEM to identify calcareous corpuscles in the outer part of parasite capsule. The microroentgenographic analysis of calcareous corpuscles mainly demonstrated the presence of phosphorus and calcium. The physiological importance of calcareous corpuscles, as well as their significance in decay of T. spiralis larvae were discussed.

Infective myositis

“…Often necrosis occurs when regeneration is less effective (55). The viable area is separated from the affected zone by a septum that appears basophilic and subsequently results in larval calcification (53,56). Signs of myalgia, swelling, and weakness indicative of muscle involvement are seen between 5 and 6 weeks after infection and subside once the larvae are encapsulated and calcified within the muscles.…”

A 13th-century cystic echinococcosis from the cemetery of the monastery of Badia Pozzeveri (Lucca, Italy)

“…Several parasites may cause focal or diffuse calcifications, but can be excluded because they only cause microscopic calcifications (e.g. Trichinella) (Machnicka et al, 2005), while others were not present in medieval Italy (e.g.…”

The “starry night” (diffuse microcalcific myopathy) – thousands of muscle microcalcifications after 30 years of Trichinella infection detected by ultrasound

“…The progressive calcification of larvae may take place after 6 months post infection (first the capsule followed by the nurse cell and the larva). The process may lead to the death of the larvae, but some larvae may survive for years in the same host [2,5]. In a study on 128 patients, 10 years after infection, no calcifications of residual larvae were detected by mammography or muscle biopsy [6].…”