Past exam of the medicine course of the University of Oxford / 1864 / Second examination / Forensic medicine and hygiene / 10

Can you state any diseases which make butchers' meat wholly unfit for human food ?

Anthrax, generalized suppurative or septic disease, and generalized tuberculosis are clear examples of conditions requiring rejection of the whole carcass; extensive parasitic disease supplies further examples. The reason for whole-carcass condemnation is systemic disease or distribution too extensive to be dealt with as an isolated local lesion.

With anthrax, infection is not a harmless change confined to one removable piece of meat. Infected animal products also pose risks during handling, and eating infected raw or undercooked meat can cause gastrointestinal anthrax. The appropriate conclusion is exclusion from the food supply, not a promise that ordinary preparation will make a suspect carcass acceptable.^[ref]

Generalized pyemia or septicaemia, with disseminated infection, multiple suppurative foci or systemic deterioration, likewise makes trimming one visible lesion an inadequate response. Generalized tuberculosis, particularly with widespread lesions or associated wasting, differs from an isolated local abnormality. For a clearly identified modern comparison, current United States meat-inspection rules require condemnation for generalized tuberculosis and for disease presenting a food-poisoning risk, expressly including septicaemia and pyemia. Those are current comparative criteria, not rules to attribute to English law in 1864.^[ref]

Parasitic meat was already a concrete contemporary concern. On Poisoning by Diseased Pork by Julius Althaus, published in 1864, discusses trichinellosis from infected pork. Trichinella larvae in muscle can be missed by casual naked-eye inspection; the historical importance of the microscope is that apparently ordinary flesh can contain parasites. Widespread infestation cannot be assumed to be confined to an easily discarded patch. Cysticerci in meat are another foodborne parasitic hazard, but exact inspection and disposition depend on the organism and distribution, and should not be invented as a universal 1864 statutory rule.^[ref][ref]

A useful biological distinction is that eating viable cysticerci in beef or pork can cause intestinal taeniasis; human cysticercosis follows ingestion of Taenia solium eggs. These are different routes and disease stages, so one should not describe cysticercosis as simply the direct result of eating pork containing cysticerci.^[ref][ref]

The contemporary English legal framework is independently verifiable. Section 2 of the Nuisances Removal Act for England (Amendment) Act 1863 empowered inspection and seizure of food appearing diseased, unsound, unwholesome or unfit, followed by a justice's disposal order where unfitness was established. It did not supply a disease-by-disease table equating every local lesion with whole-carcass rejection. Thus the answer gives diseases and the medical reason for excluding the whole animal, while keeping localized lesions, generalized disease and legal procedure distinct.^[ref]