Jelena K.,Center for Food Analyses |
Ruzica A.,University of Belgrade |
Baltic Misic D.,University of Belgrade |
Mirjana D.,University of Belgrade |
And 3 more authors.
Acta Veterinaria | Year: 2011
Listeria monocytogenes is a bacterium that is pathogenic for man and for most animal species. Listeriosis is a generalized infection that starts after ingestion of the causative agent L. monocytogenes (Finlay, 2001). Food that is not properly thermically processed, long storage of such food, food that is produced in inadequate hygienic food plants, as well as cooked-cooled ready to eat food (RTE) is the ideal medium for listeria multiplication. High risk food originated from fish, fish products and sea products comprised of: molluscs (fresh of frozen shellfish, crustaceans shelled or not), fresh fish (ready to eat without cooking), fish products packed with brine (NaCl<6%), (salted, marinated, fermented, cold smoked and fish in brine), thermically treated fish and crustacean products (pasteurization, cooking, hot smoking, including pre-cooking and panning). In this research, fish samples, fish products and sea products from Serbian markets were examinated such as: fresh fish (cooled), frozen food (fish and sea products - cuttlefish, squid, octopus, shellfish, crustaceans and shrimps), panned products; smoked fish, salted fish, thermally treated fish and fish products, semi-canned fish and canned fish. Microbiological testing has been performed according to Internationally prescribed standards ISO 11290-1 (1996) "Microbiology of food and animal feed stuffs - Horizontal method for the detection and enumeration of Listeria monocytogenes". There were 470 samples from fish products and sea products. Presence of Listeria spp was registered in 58 samples (12.34%). Listeria monocytogenes was found in 1.92% samples (9 isolates), which makes 15.52% of the total Listeria that were isolated from the tested food. Other isolated Listeria belong to the following species: L. innocua (8.51%), L.welshimeri (1.28%), L.welshimeri/innocua (0.21%), L. grayi (0.21%) and L. seeligeri (0.21%). Exceptional viability of Listeria monocytogenes in the food tested was documented, also (freezing temperature - 18°C, five months).
Stefanovic G.,University of Nis |
Skrijelj H.,Public Utility Company |
Ristovic I.,University of Belgrade |
Milosevic O.,ED Jugoistok |
Popovic S.,Public Utility Company
Journal of Environmental Protection and Ecology | Year: 2014
Sustainable waste management started to be implemented in Serbia in 2009. Before that, waste management was reduced to a collection and disposal of waste in unsanitary landfill. The situation is similar in the municipality of Novi Pazar. The landfill, which was built with the intention of being a sanitary landfill, has lost that status. Instead, it has become a risk to human health and the environment. At the same time, each year a new amount of waste is generated and disposed of without any plan. On the other hand, questions arise about the optimisation of waste disposal costs and its more efficient use. This paper describes the current status of waste management, the amount of waste generated and its composition. Special attention is given to the existing landfill. Based on the data analysis, an advanced waste management model is made to include the existing legislation, the economic feasibility and sustainable development principles. It is shown that with an integrated waste management which includes landfill mining and sorting of old and new generated waste is possible to reduce both the amount of disposed waste and negative impact to the environment and achieve economic profit through material recovery.
Stojanov I.,Scientific Veterinary Institute Novi Sad |
Dragica S.,Scientific Veterinary Institute Novi Sad |
Milic N.,University of Belgrade |
Milica Z.B.,Scientific Veterinary Institute Novi Sad |
And 3 more authors.
Acta Veterinaria | Year: 2011
Meat, table eggs and their products are very important in human nutrition. Therefore, it is necessary to monitor the health status of commercial flocks as much as the quality of poultry products in the food chain. Campylobacter sp. and Salmonella sp. are widely distributed in nature. The influence of these bacteria on animal health depends on the immune response. If animals are not immunologicaly compromised, the infection is latent and clinical symptoms are absent. Unlike animals, these bacteria cause serious diseases in humans and the morbidity is quite high. The main transfer of infection to humans is via poultry products. The goal of this work was to study the role of Salmonella in artificially infected chickens onto the outcome of clinical campylobacteriosis. It is certain that salmonella infection in poultry damages the immune system of chickens, enabling Campylobacter to multiply and subsequently induce a disease. Three groups of chickens were included in the experiment. The first group received a suspension of field strain of Campylobacter jejuni (C. jejuni) and Salmonella entérica serovar Enteritidis (S. Enteritidis). The second group received an inoculum prepared from the field isolate of Campylobacter jejuni and the third group received the field isolate of Salmonella entérica serotype Enteritidis, only. In artificially infected chickens Campylobacter and Salmonella were confirmed by isolation and identification according to morphological, cultural and biochemical properties. Humoral Immune response of infected chickens was monitored using the complement fixation test (CFT). In chickens infected with C. jejuni and S. Enteritidis the clinical symptoms were recorded. The results from this experiment show that salmonella infection damages the immune system of the chickens enabling Campylobacter to alter the health status of the host.