2009, Number 2
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Vet Mex 2009; 40 (2)
Effect of different temperatures (freezing and boiling) in pork on the viability of metacestodes of Taenia solium
Nava BG, Martínez VAN, Aluja AS
Language: English/Spanish
References: 11
Page: 191-196
PDF size: 148.37 Kb.
ABSTRACT
In many rural areas of Mexico, pork infected with
Taenia solium is still being consumed, mainly because of the domiciliary slaughter of animals in villages where meat inspection does not exist. It follows that taeniasis cysticercosis continues to be an important health problem both for humans who suffer from taeniasis and neurocysticercosis and for pork producers due to the economic losses involved. In order to recommend a simple and effective method for housekeepers in rural zones to inactivate the metacestodes, infected pork cut in slices of 4 cm thickness was exposed to different temperatures and periods of time. Evagination trials were done and hamsters were infected with the treated larvae. The results show that metacestodes in pieces of pork of 4 cm thickness are innocuous after boiling them for 15 minutes or freezing them at 0° C for 96 hours or for 48 hours at –20° C, but the latter is not feasible in a rural environment. Boiling or freezing at 0° C in a domestic refrigerator is recommended as a simple procedure in marginated areas to avoid the growth of Taenia solium in human beings and thus interrupt the cycle of the parasite.
REFERENCES
ALUJA A S DE. La cisticercosis porcina en México. En: LARRALDE C, S DE ALUJA A, (coords). Cisticercosis. Guía para profesionales de la Salud. México DF: Fondo de Cultura Económica, 2006:104-132.
LARRALDE C, SCIUTTO E. El control de la Taenia solium en México, quinientos años después de su llegada al Nuevo Mundo. En: LARRALDE C, S DE ALUJA A, (coords). Cisticercosis. Guía para profesionales de la Salud. México DF: Fondo de Cultura Económica, 2006:182-237.
SCIUTTO E, FRAGOSO G, LARRALDE C. Vacunas contra la cisticercosis. En: LARRALDE C, S DE ALUJA A, (coords). Cisticercosis. Guía para profesionales de la Salud. México DF: Fondo de Cultura Económica. 2006:167-181.
GEMMEL ML, MATYAZS Z, PAWLOWSKI Z., SOULSBY L, LARRALDE C, NELSON GS. et al., editors. Guidelines for Surveillance Prevention and Control of Taeniasis/Cysticercosis. VPH/ 83.49. Geneve, Switzerland: World Health Organization, 1985: 207.
SECRETARÍA DE AGRICULTURA, GANADERÍA Y DESARROLLO RURAL. Norma Oficial Mexicana. NOM – 030 – ZOO - 1995. Especificaciones y procedimientos para la verificación de carnes, canales, vísceras y despojos de importación en puntos de verificación zoosanitaria. 17/04/1996.
RODRIGUEZ–CANUL R, ARGAEZ–RODRIGUEZ F, PACHECO DE LA GALA D, VILLEGAS PÉREZ S, FRASER A, CRAIG PS et al. Taenia solium metacestode viability in infected pork preparation with SALT pickling or cooking methods common in Yucatan, Mexico. J Food Prot 2022;65:666-669.
THORNTON H. Textbook of Meat Inspection. 5a ed. London: Baillière, Tyndall and Cassell, 1968.
HILWIG RW, CRAMER JD, FORSYTH KS. Freezing times and temperatures required to kill cysticerci of Taenia saginata in beef. Vet Parasitol 1978;4:215-219.
FUENTES PB, NEGRETE MJ, VILLALOBOS PR. Algunos factores físicos y químicos que afectan la evaginación de Cisticercos cellulosae in vitro. Rev Inst Salubr Enferm Trop Mex 1960;20:103-128.
FLISSER A, AVIDAN Y, LAITER S, MINTZ D, ONGAY H. Efectos de agentes físicos y químicos sobre la viabilidad del cisticerco de Taenia solium. Salud Pública de México. 1986;28:551-555.
SOTELO J, ROSAS N, PALENCIA G. Freezing of infested pork muscle kills cysticerci. JAMA 1986;256:893-894.