Enteritis campylobacterialis has an increasing trend in Serbia. Human illness usually appears as sporadic case, most commonly in children with obvious seasonality. In registered outbreaks, incriminated food was most frequently poultry meat. Campylobacter is one of the most important food borne pathogens, commonly underreported, mostly because isolation of this bacteria requires specific equipment. Since 1 January 2019, monitoring of Campylobacter in poultry carcasses is mandatory when it comes to poultry production facilities in Serbia. The aim of this paper was to analyze data from Autonomous Province of Vojvodina about the prevalence of Campylobacter spp. in poultry meat and risk for human illness. Our results indicate high prevalence of Campylobacter spp. in whole food chain: poultry farms, slaughterhouses, retail and, correspondingly, high risk for consumers in Vojvodina. Measures for risk reduction of disease incidence include better bio security measures on the farm level as a main source of pathogen but also introduction of Campylo bacter diagnostic equipment in all human diagnostic and food control laboratories.

Construction materials, traditionally used in process equipment, are today successfully replaced by composite materials. Hence, many pipes are made of these materials. The subject of this study was the influence of liquids on the state of stresses and tensile strengths in the longitudinal and circumferential direction of glass-polyester pipes of a definite structure and known fabrication process. These analyses are of great importance for the use of glass-polyester pipes in the chemical industry. The tensile properties (the ultimate tensile strength and the modulus of elasticity) were tested and determined for specimens cut out of the pipes; flat specimens for the tensile properties in the longitudinal direction and ring specimens for the tensile properties in the circumferential direction. First, the tension test was performed on virgin samples (without the influence of any liquid), to obtain knowledge about the original tensile properties of the material composite studied. Subsequently, the specimens were soaked in alkaline solutions: sodium hydroxide (strong alkali) and ammonium hydroxide (weak alkali). These solutions were selected because of their considerable difference in pH values. The specimens and rings were left for 3, 10, 30 and 60 days in each liquid at room temperature. Then, the samples were tested on tension by the standard testing procedure. A comparison of the obtained results was made based on the pH values of the aggressive media in which the examined material had been soaked, as well as based on the original tensile properties and the number of days of treatment. Micromechanical analyses of sample breakage helped in the elucidation of the influence of the liquids on the structure of the composite pipe and enabled models and mechanisms that produced the change of strength to be proposed