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Summary Risk Profile on Cysticercus bovis in meat from domestic cattle








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    Book (series)
    Risk-based examples and approach for control of Trichinella spp. and Taenia saginata in meat
    Revised edition
    2020
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    Human trichinellosis is caused by the consumption of raw or inadequately treated meat from domestic or game animals containing the larvae of parasites of the Trichinella species. Taenia saginata causes bovine cysticercosis, a parasitic disease of cattle, by the larval stage (Cysticercus bovis) of the human tapeworm Taenia saginata. Taeniosis, infection of humans with the adult tapeworm, ocurrs following consumption of beef with cysticerci that has not been sufficiently heated or frozen to kill the parasite. This report provides the spreadsheet models resulted in effective generation of the quantitative information needed by public health officials when evaluating different postmortem meat hygiene programmes for Trichinella spp. and Taenia saginata in meat. The models enable the development of science-based risk scenarios to assess the effect of various changes to digestion testing and meat inspection for Trichinella spp. and Taenia saginata on the residual risk of human trichinellosis and taeniosis. The outcome of estimation is based on changes in relative risks rather than specific estimates of risk.
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    Meeting
    Proper targets for public health attention: the New Zealand experience with Taenia saginata
    Conference Room Document proposed by New Zealand
    2002
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    Cattle can be a host for the Taenia saginata infection which presents as a tapeworm in humans. It is not of large public health significance in New Zealand, nor in its beef production. A range of treatments - including proper cooking - is possible for meat which might carry undetected cysts. Medical treatment is also readily available in New Zealand for any humans infected. Studies have shown that a (theoretical) suspension of post-mortem inspection for the parasite would make little impact on p ublic health outcomes. Many importing country requirements still require this check to be part of the processing procedures. There are grounds for reassessing the reasons for this inspection in New Zealand's case, and for considering better use of scarce resources. Other countries may wish to consider the New Zealand modelling as they rank their public health priorities. As the Codex Alimentarius Commission considers its work on food safety objectives (and the Codex Committee on Meat and Poultry Hygiene recommences work), there may be lessons with wider relevance than just their application to the New Zealand situation
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    Document
    Summary Risk Profile on Trichinella in meat 2013
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    Trichinellosis is a parasitic disease of humans caused by eating raw or inadequately treated meat from domestic or game animals infected by Trichinella spp. Infective first stage larvae live in muscle cells of a wide range of meat-eating mammals, and some birds and reptiles (OIE, 2012). Human trichinellosis contracted from commercial supplies of meat have been most often linked to infected pigs, wild boar, or horses. Human cases have been also linked to the consumption of infected meat from game animals including bears and walruses. The parasite is a nematode which has an atypical direct life cycle that does not involve stages developing outside of the host. Muscle larvae are released from infected meat in the stomach of suitable host species, develop to adult worms in the intestine, and produce pre-encapsulated larvae which migrate preferentially to certain muscle sites in the host to complete the life cycle within several weeks. Within the muscle cells the larvae of some Trichinella species are encapsulated in a thick collagen layer. Within the host muscle larvae remain infective for up to several years. All genotypes of Trichinella are pathogenic for humans, but in animals the infection appears clinically unapparent. Some animal species serve as reservoir hosts. Domestic pigs and rats have been reported to harbour T. spiralis within the domestic cycle mostly in temperate regions of the world (

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