Análise da qualidade de ovos comercializados no município de Santarém
Fecha
2022-06-30Autor
http://lattes.cnpq.br/6616806425702577
https://orcid.org/0000-0002-0536-6090
CORDOVIL, Kely Prissila Saraiva
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The objective of this work was to evaluate the storage time on the physicochemical quality, as
well as the health status and the bromatological composition of eggs from the conventional and
free range systems commercialized in the municipality of Santarém. The experiment took place
in the Laboratory of the Technological Nucleus of Bioactives (NTB) in partnership with the
Laboratory of Bromatology and Microbiology, all at Ufopa. A total of 120 eggs were used for
each production system, totaling 240 eggs. The experimental design used was entirely
randomized (DIC), in a 2x3 factorial scheme, with two production systems (conventional and
free-range), the samples were stored at a temperature of approximately 4ºC and evaluated in
three storage periods (0, 7 and 21 days). The variables evaluated were egg weight (g), albumen
height, Haugh unit, yolk index (g), specific gravity (g mL-1), shell weight, shell thickness,
percentage of yolk (%), albumen (%) and shell (%), pH of yolk and albumen. Bromatological
(dry matter, mineral matter, crude protein and ether extract) and microbiological (E. coli,
Staphylococcus aureus, Salmonella spp. and total mesophilic heterotrophic bacteria) analyses
were also performed. Data were tabulated and submitted to analysis of variance using the
Bioestat 5.0 computer program, and means were compared using the Tukey test at a 5%
significance level. The egg weight variable was significant (p<0.05) for commercial eggs
evaluated on day 21, showing a reduction of 5.07g when compared to day 0. The best results
for Haugh unit and yolk index were observed for the free-range eggs, where there was no
statistical difference (p>0.05). For the specific gravity variable, in both types of eggs evaluated
there was a reduction on day 21 of evaluation. Regarding pH, both presented outside the ideal
established for fresh eggs (day 0), yolk 6.0 and albumen 6.6. Regarding the microbiological
analysis, it was not observed in the samples of commercial and free-range eggs the presence of
any bacterium foreseen in the product regulation (E. coli, Staphylococcus aureus and
Salmonella), however, the presence of mesophilic aerobic heterotrophic bacteria was observed
in commercial eggs (49x10³, 235, 15.8x10² CFU/g). Regarding the bromatological analysis, it
was possible to observe statistical difference (p<0.05) for dry matter, ether extract and raw
protein for albumen and dry matter, mineral matter and raw protein for yolk. The eggs from the
conventional system showed lower results for internal quality. It can be inferred that the eggs
from the caipira production system, based on the data of this study, have better quality according
to the storage used.