Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response

ABSTRACT The effective formalin therapeutic concentration (ETC) against Cichlidogyrus spp. infecting tilapia was obtained. Also, the stress and immune response to formalin baths in O. niloticus were achieved. A static bioassay with four concentrations (0.5, 1.0, 1.5, 2.0 mL L-1) of formaldehyde (37%...

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Autores principales:	Sandoval-Gío,Juan J., Rodríguez-Canul,Rossanna P., Vidal-Martínez,Víctor M., Fájer-Ávila,Emma J., Améndola-Pimenta,Mónica
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2019
Materias:	tilapia Cichlidogyrus monogeneans serum cortisol serum glucose innate response
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2019000100034
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spelling	oai:scielo:S0718-560X20190001000342019-03-27Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress responseSandoval-Gío,Juan J.Rodríguez-Canul,Rossanna P.Vidal-Martínez,Víctor M.Fájer-Ávila,Emma J.Améndola-Pimenta,Mónica tilapia Cichlidogyrus monogeneans serum cortisol serum glucose innate response ABSTRACT The effective formalin therapeutic concentration (ETC) against Cichlidogyrus spp. infecting tilapia was obtained. Also, the stress and immune response to formalin baths in O. niloticus were achieved. A static bioassay with four concentrations (0.5, 1.0, 1.5, 2.0 mL L-1) of formaldehyde (37% dilution) in water, and one control without this substance was performed. Results evidenced that 1.5 mL L-1 of formalin for 40 min was the ETC to eradicate monogeneans without manifesting macroscopic damage to fishes. Thirty tilapias underexposure with ETC of formalin (FORM Group) were evaluated for stress, utilizing cortisol and glucose determination, and immune response (lysozyme activity and differential counting of organic defense cells). Other 30 tilapias without cichlidogyriasis and with no exposure to formalin were the Control Group. Evaluation times were: three hour pre-treatment (T0), and one hour, three days and three months post-treatment (T1, T2, and T3, respectively). A peak of cortisol (~326 ng mL-1) was observed in tilapias of FORM Group at T1 with significant differences with the control group (P < 0.05). Similarly, glucose concentration reached significant values (~119 mg dL-1) at one hour after the conclusion of treatment (P < 0.05). Those values returned to the basal limit at the last time of the study. The lysozyme activity and white blood cells in differential counting showed no significant differences in the same conditions (P > 0.05). Results confirmed total control of cichlidogyriasis with the ETC of formalin obtained and an evident resistance of tilapia to treatment as stabilization of its physiological stress response was achieved.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.47 n.1 20192019-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2019000100034en10.3856/vol47-issue1-fulltext-5
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	tilapia Cichlidogyrus monogeneans serum cortisol serum glucose innate response
spellingShingle	tilapia Cichlidogyrus monogeneans serum cortisol serum glucose innate response Sandoval-Gío,Juan J. Rodríguez-Canul,Rossanna P. Vidal-Martínez,Víctor M. Fájer-Ávila,Emma J. Améndola-Pimenta,Mónica Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response
description	ABSTRACT The effective formalin therapeutic concentration (ETC) against Cichlidogyrus spp. infecting tilapia was obtained. Also, the stress and immune response to formalin baths in O. niloticus were achieved. A static bioassay with four concentrations (0.5, 1.0, 1.5, 2.0 mL L-1) of formaldehyde (37% dilution) in water, and one control without this substance was performed. Results evidenced that 1.5 mL L-1 of formalin for 40 min was the ETC to eradicate monogeneans without manifesting macroscopic damage to fishes. Thirty tilapias underexposure with ETC of formalin (FORM Group) were evaluated for stress, utilizing cortisol and glucose determination, and immune response (lysozyme activity and differential counting of organic defense cells). Other 30 tilapias without cichlidogyriasis and with no exposure to formalin were the Control Group. Evaluation times were: three hour pre-treatment (T0), and one hour, three days and three months post-treatment (T1, T2, and T3, respectively). A peak of cortisol (~326 ng mL-1) was observed in tilapias of FORM Group at T1 with significant differences with the control group (P < 0.05). Similarly, glucose concentration reached significant values (~119 mg dL-1) at one hour after the conclusion of treatment (P < 0.05). Those values returned to the basal limit at the last time of the study. The lysozyme activity and white blood cells in differential counting showed no significant differences in the same conditions (P > 0.05). Results confirmed total control of cichlidogyriasis with the ETC of formalin obtained and an evident resistance of tilapia to treatment as stabilization of its physiological stress response was achieved.
author	Sandoval-Gío,Juan J. Rodríguez-Canul,Rossanna P. Vidal-Martínez,Víctor M. Fájer-Ávila,Emma J. Améndola-Pimenta,Mónica
author_facet	Sandoval-Gío,Juan J. Rodríguez-Canul,Rossanna P. Vidal-Martínez,Víctor M. Fájer-Ávila,Emma J. Améndola-Pimenta,Mónica
author_sort	Sandoval-Gío,Juan J.
title	Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response
title_short	Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response
title_full	Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response
title_fullStr	Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response
title_full_unstemmed	Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response
title_sort	formalin toxicity to oreochromis niloticus; its effectiveness against cichlidogyrus spp. and host stress response
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2019000100034
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Formalin toxicity to Oreochromis niloticus; its effectiveness against Cichlidogyrus spp. and host stress response

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