alexa Administration of Three Autochthonous Bacillus subtilis
ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
Open Access

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Research Article

Administration of Three Autochthonous Bacillus subtilis Strains Induce Early Appearance of Gastric Glands and Vestiges of Pylorus in Piaractus mesopotamicus Larvae

Marcos Gabriel Guidoli1-3, David Roque Hernández1, Silvia Irene Boehringer2, Sebastián Sánchez1 and María Elena Fátima Nader-Macías3*
1Instituto de Ictiología del Nordeste (INICNE), Argentina
2Cátedra de Microbiología-Facultad de Ciencias Veterinarias-Universidad Nacional del Nordeste. CP: 3400, Sargento Cabral 2139, Corrientes Capital, Corrientes, Argentina
3Centro de Referencia de Lactobacilos (CERELA-CONICET). CP: T4000ILC, Chacabuco 145, San Miguel de Tucumán, Tucumán, Argentina
*Corresponding Author : María EF Nader-Macías
Centro de Referencia para Lactobacilos (CERELA-CONICET)
Chacabuco 145, CP: T4000ILC
San Miguel de Tucumán, Argentina
Tel: +54-381-431-0465
Fax: +54-381-400-5600
E-mail: [email protected]
Received: February 26, 2016 Accepted: March 18, 2016 Published: March 22, 2016
Citation: Guidoli MG, Hernandez DR, Boheringer SI, Sanchez S, Nader- Macias MEF (2016) Administration of Three Autochthonous Bacillus subtilis Strains Induce Early Appearance of Gastric Glands and Vestiges of Pylorus in Piaractus mesopotamicus Larvae. J Bioprocess Biotech 6:271. doi:10.4172/2155-9821.1000271
Copyright: © 2016 Gabriel GM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Autochthonous microorganisms as probiotics are a novel alternative to antibiotics. The genus Bacillus is highly used by its ability to survive on adverse conditions. Piaractus mesopotamicus, a native fish, is the most produced specie in Argentinian aquaculture. The low level of knowledge, high stress conditions and demand of animals led to a deficit in the number of larvae and fry. The aim of this study was to evaluate the probiotic effect of previously selected autochthonous Bacillus on biometrical parameters of P. mesopotamicus larvae when administered together in a combined suspension in different doses and stages. Results showed that the bacterial administration did not cause significant effects on the variables evaluated. However, the dose containing 6 × 107 CFU L-1 of each strain showed the highest average values of P. mesopotamicus biological parameters, regardless the stage of administration. Histological evaluations of animals administered with this dose did not showed adverse effects and indicated the capability of this dose, administered in a particularly period of time, to stimulate the early appearance of gastric glands, vestiges of what would be the pylorus and a higher development of liver. Thus, we proposed the safe use of this dose in a combined probiotic mixture to be studied in further assays.


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