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Microbiological and chemical characteristics of a zootechnical additive obtained in Ecuador for its use in animal feeding Características microbiológicas y químicas de un aditivo zootécnico obtenido en Ecuador para su uso en la alimentación animal Guerrero López, J.R. Valiño Cabrera, Elaine C. Rodríguez Sánchez, Bárbara García Hernández, Yaneisy González Puetate, I.R. bacteria chemical composition fermentation yeasts bacterias composición química fermentación levaduras   Microbiological and chemical characteristics of a zootechnical additive were determined for its use in animal feeding. The production process consisted of batch submerged fermentation at 18 ± 2 °C for seven days, mixed with an absorbent material, and then dried naturally. Two batches were formed, and the concentrations of mesophilic aerobes, fungi and yeasts, enterobacteria, total coliforms, Escherichia coli, Salmonella, and Listeria were calculated in duplicate. Humidity percentage, crude protein, ash, fat, crude fiber, total carbohydrates, pH, and total solids were also determined. The solid additive presented 1.4x107 cfu/g of mesophilic aerobes, 106 cfu/g of yeast, absence of pathogens, 14.2 % of humidity, 14 % of protein and crude fiber, 11.8 % of ash, 0.21 % of fat, pH of 6.72, and 3.0° Brix. Results indicate that the product has potential for its use as a zootechnical additive. Se determinaron las características microbiológicas y químicas de un aditivo zootécnico para su uso en la alimentación animal. Elprocedimiento de obtención consistió en una fermentación sumergida discontinua, a 18 ± 2 °C durante siete días, mezclada conun material absorbente y secado de forma natural. Se conformaron dos lotes y se calculó por duplicado la concentración de aerobiosmesófilos, hongos y levaduras, enterobacterias, coliformes totales, Escherichia coli, Salmonella y Listeria. Se determinó además, porcentaje de humedad, proteína bruta, cenizas, grasa, fibra cruda, carbohidratos totales, pH y sólidos totales. El aditivo sólido presentó 1.4x107 ufc/g de aerobios mesófilos, 106 ufc/g de levaduras, ausencia de patógenos, 14.2 % de humedad, 14 % de proteína y fibra bruta, 11.8 % de cenizas, 0.21 % de grasa, pH de 6.72 y 3.0 º Brix. Los resultados indican que el producto obtenido posee potencialidades para su utilización como aditivo zootécnico. Instituto de Ciencia Animal 2025-09-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf application/pdf text/html application/epub+zip application/zip https://cjascience.com/index.php/CJAS/article/view/1177 Cuban Journal of Agricultural Science; Vol. 59 (2025): January-December ; https://cu-id.com/1996/v59e07 Cuban Journal of Agricultural Science; Vol. 59 (2025): January-December ; https://cu-id.com/1996/v59e07 2079-3480 0864-0408 eng spa https://cjascience.com/index.php/CJAS/article/view/1177/1799 https://cjascience.com/index.php/CJAS/article/view/1177/1800 https://cjascience.com/index.php/CJAS/article/view/1177/1801 https://cjascience.com/index.php/CJAS/article/view/1177/1802 https://cjascience.com/index.php/CJAS/article/view/1177/1803 Copyright (c) 2025 This article is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0) https://creativecommons.org/licenses/by-nc/4.0/deed.es_ES