Efectos de la desinfección por inmersión, aspersión y nebulización en huevos fértiles Cobb 500 para la incubación
Three disinfection methods and two types of disinfectants were evaluated. A DCA was applied with a 3x2 factorial arrangement, where the factors under study were the following: Factor A: Disinfection methods (Immersion, spraying, nebulization) Factor B: Type of disinfectant (Quaternary ammonium, phen...
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| Format: | bachelorThesis |
| Idioma: | spa |
| Publicat: |
2021
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| Accés en línia: | http://repositorio.espam.edu.ec/handle/42000/1620 |
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Afegir etiqueta | Sumari: | Three disinfection methods and two types of disinfectants were evaluated. A DCA was applied with a 3x2 factorial arrangement, where the factors under study were the following: Factor A: Disinfection methods (Immersion, spraying, nebulization) Factor B: Type of disinfectant (Quaternary ammonium, phenol). The variables to be measured were: Bacterial load (E.coli, Salmonella) and fungal (Penicillium, Aspergillus) in fertile eggs, percentage of contaminated eggs during incubation, E.coli and Salmonella bacterial level in bb chicks. The results for the variable E. coli showed that T1 (Quaternary Ammonium by immersion) obtained the highest bacterial value with 63.25 UFC / gr and T6 (phenol by nebulization) was the one that presented the lowest bacterial load with 6 UFC / gr, however, no significant difference was found between the treatments. The variable salmonella in fertile eggs showed that all treatments presented an absence of microorganisms. A significant difference was found for factor A in the Penicillium variable, being T3 (Quaternary Ammonium by Nebulization) the one that obtained the least load of this microorganism, with 1.5x102 UFC / g and T2 (Quaternary Ammonium by Aspersion) the one that assumed the highest Penicillium value 19.75x102; for Aspergillus it did not show differences between the factors; in contaminated eggs they did not show significant differences between the data; bacterial levels in bb chicks did not show the presence of these microorganisms. It is concluded that the nebulization method with any type of disinfectant reduces the bacterial and fungal load in fertile eggs, however the most economical method for disinfection is the spray phenol. |
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