This study aimed to evaluate the microbiological, physicochemical and fatty acid profile of the of "Tambica" (Oligosarcus robustus) raw fish meat and develop and characterize a fish burger. The fish burger was subjected to a sensory analysis. The raw fish meat showed a high content of moisture (82.3%) and minerals (3.1%), a low content of fat (1.5%) and a considerable protein content (13.1%). The raw fish showed a high count of positive coagulase Staphylococcus. Tambica lipid fraction was composed of 41.9% unsaturated and 58.2% saturated fatty acids. Palmitic acid and oleic acid were the major fatty acids in the raw meat fish. The fish burger was well accepted by sensory analysis.

Sixty-six samples were collected from a broiler chicken abattoir. Eighteen samples were collected from the retail market in Southern Brazil, where the slaughtered broilers were commercialized, so that the microbiological assessment of the samples in the broiler industrial chain could be undertaken. And eighteen samples submitted to clients´ common home procedures were similarly assessed. All samples were evaluated by quantifying total and thermotolerant coliforms, psycrotrophic bacteria, Pseudomonas spp, Escherichia coli and research for Salmonella spp and Listeria monocytogenes. Results on counts and on the occurrence of microorganisms in samples from specific sites in the broiler processing chain demonstrate the need for a re-assessment of hygiene practices throughout the whole process and educational activities should be direct to all people involved, including consumers.

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The capacity of Pseudomonas spp. and Listeria spp. isolates in forming polystyrene and stainless steel biofilms was assessed and their resistance to disinfectants and antibiotics agents was verified. Isolates originated from chicken and buffalo meat cuts in abattoirs and retail outlets in the southern region of the state of Rio Grande do Sul, Brazil. Isolates which formed stainless steel biofilm were tested with regard to the activities of the disinfectant agents organic chlorine and ammonium quaternary. Isolates of L. monocytogenes formed polystyrene and stainless steel biofilm. Further, 32 and 72% of Pseudomonas spp. isolates respectively formed polystyrene and stainless steel biofilm. The disinfectant agent ammonium quaternary was more efficient than organic chlorine in the decrease of biofilms on stainless steel surfaces for Listeria isolates. Multi-resistance to antibiotics was high for Listeria spp. (94.7%) and Pseudomonas spp (84%). From these results, isolates from chicken and buffalo meat cuts were developers of biofilm on polystyrene and stainless steel, and resistants' to antibiotics, putting at risk consumers´ health.