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The objective of the study was: a) to determine the dynamics of spoilage in liver, kidneys and in muscle tissue of swine and cattle, based on the level of deterioration products (NH₃ and H₂S) and on the organoleptic changes of these tissues (appearance and odor) and b) to state the correlation between the spoilage changes and total count of bacteria and the activity of cathepsine D in these tissues. The rate of spoilage, total count of bacteria and cathepsine D level were determined just after slaughter and after 1, 2, 3, 6, 9 and 12 days of storage at 2—4°C. It was stated that the spoilage of liver and kindeys (level of NH₃ and H₂S) starts already after 3 days, but distinct organoleptic changes do not occure before 6 days. In the muscle tissue however, the spoilage (level of NH₃, H₂S and organoleptic changes) starts not before 6 days of cold storage. The number of bacteria in liver and kidneys starts to grow just after 24 hours of storage, while in muscle tissue starts not before 6 days. The activity of cathepsine D in organs and muscle tissue increases significantly till 24 hours, then decreases and disappears completely after 3 days. The level of cathepsine D is much lower in the muscles then in liver and kidneys. The results of the study are indicating that the main factor of spoilage is closely connected with bacterial contamination and that the cathepsins do not play any significant role in these processes.
Poland exports approximately 8000 tons of venison annually. It is sent primarily to Germany, the Skandinavian countries and Japan. Game meat in Poland undergoes the same veterinary inspection as does the meat of slaughter animals. In the years 1988-1992 a sum of 498 thousand wild boars, 835 thousand roe deer, 207 thousand red deer and moose, 1,175 thousand hares, as well as 2,171 thousand game fowl was hunted. Veterinary inspection was carried out in particular years on 89.6-95.3% of the boars, approximately 97% of the roe deer, from 3.3-18.4% of the hares, as well as 6.9-1.9% of the game fowl. Cases of entire unlit carcasses were determined in 1.08-1.43% of the boars, 0.15-0.27% of the roe deer, 0.40-0.51% of the red deer and moose, 0.19-0.76% of the hares, and 0.65- -1.09 % of the game fowl. Portions of the carcass or internal organs were deemed unfit in the game animals in the following percentages: boars 7.5-26.9% of the animals; roe deer 3.14-16.94%; red deer and moose 4.80-18.48%; hares 0.35-3.06%; game fowl 0.41-1.12%. The most common causes of confiscation were diagnosed diseases of the respiratory tract in 19% of the cases, deterioration in 19.3%, as well as parasitic diseases in 57.2%. Among the parasitic zoonoses, of particular concern is the increasing incidence of trichinellosis in boars. In 1988 the extensiveness of trichinellosis in these animals was 0.29%, in 1992 it was 0.40%. This is approximately a hundred times higher than in domestic pigs, which in the discussed period remained constant at 0.003%. Considering the fact that not all the killed boars are tested for Trichinella spiralis, there in a strong chance that 10,103 boars were not tested. If we accept an extensiveness of trichinellosis invasion up to 0.4% in boars, as took place in 1992, it can be estimated that the meat of 40 not veterinary inspected boars infested with Trichinella was consumed. Among infectious diseases worth noting is the occurrence of rabies, in wild animals as a whole and game animals as well. In the span of the last ten years it has been confirmed primarily in roe deer, but its main source remains foxes.
The aim of the study was to analyze the results of postmortem examinations conducted by the Veterinary Inspectorate on sheep and goats in Polish slaughterhouses in 2003-2013. During this period, over 260,000 sheep and goats were slaughtered, of which 0.8% were slaughter goats. In 92,050 carcasses, that is, in 35.21% of all carcasses examined, pathological lesions or quality changes were found. Only 448 carcasses, that is, 0.49% of carcasses with pathological lesions or quality changes, and 0.17% of all carcasses examined, were judged unfit for consumption. The most frequent lesions were parasitic invasions (49.69%) and purulent foci (47.96%). On the other hand, the most common causes of the rejection of carcasses as unfit for consumption were natural death or slaughter in a moribund condition (41.52%), followed by purulent foci (13.39%) and emaciation (11.16%). In the past 11 years, there have been only 23 cases of scrapie (5.13% of carcasses unfit for consumption). Since 2010 there has been a systematic decrease in the number of carcasses showing pathological lesions, and since 2009 there has been a decrease in the number of carcasses diagnosed with parasitic invasions, and at the same time no meat has been rejected on this ground. What was characteristic of this period was a small number of lesions caused by microorganisms, and, since 2004, a decreasing number of carcasses with qualitative changes, including excessive emaciation and insufficient bleeding, hydraemia, jaundice, organoleptic anomalies, incomplete bleeding, natural death or slaughter in moribund condition, purulent foci, contamination, and congestion.
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