pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age
The objective of this study was to determine the pH in the luminal mucosa of the gastric compartments and intestinal segments during the first 45 postnatal days of age in the alpaca (Vicugna pacos). Thirty three alpacas from birth to 45 days of age were distributed in seven age groups. The animals proceeded from the Puno and Cusco departments of Peru. The pH was measured using a 826 pH mobile meter with a special flat electrode for membranes. Animals were slaughtered and the gastrointestinal tract was divided in 13 segments. An 8-cm length opening was done in each segment and pH was directly measured over the mucosa. The pH of compartments 1, 2 and 3 (segment abomasum) was lower at birth (p<0.05), increased during the first week and kept constant until 45 days of age. The pH in the intestinal segments was constant in all age groups, but there was a slight tendency to acidity in the small intestine and a tendency to neutrality in the large intestine. This suggests that alpacas of these ages have homeostatic mechanisms for maintaining constant the pH of the microclimate in the gastrointestinal tract despite the change of feeds during the first phase of postnatal life.
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Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria
2012
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oai:ojs.csi.unmsm:article-8782020-03-19T23:54:27Z pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age pH DE LA SUPERFICIE LUMINAL DE LA MUCOSA GASTROINTESTINAL DE CRÍAS DE ALPACAS DURANTE LAS PRIMERAS SEMANAS DE EDAD. Vásquez C., María Rodríguez G., José Lira M., Boris Cueva M., Sergio Ayón S., Milder Mallma D., Yenny pH mucosa gastrointestinal alpaca pH gastrointestinal mucosa alpaca The objective of this study was to determine the pH in the luminal mucosa of the gastric compartments and intestinal segments during the first 45 postnatal days of age in the alpaca (Vicugna pacos). Thirty three alpacas from birth to 45 days of age were distributed in seven age groups. The animals proceeded from the Puno and Cusco departments of Peru. The pH was measured using a 826 pH mobile meter with a special flat electrode for membranes. Animals were slaughtered and the gastrointestinal tract was divided in 13 segments. An 8-cm length opening was done in each segment and pH was directly measured over the mucosa. The pH of compartments 1, 2 and 3 (segment abomasum) was lower at birth (p<0.05), increased during the first week and kept constant until 45 days of age. The pH in the intestinal segments was constant in all age groups, but there was a slight tendency to acidity in the small intestine and a tendency to neutrality in the large intestine. This suggests that alpacas of these ages have homeostatic mechanisms for maintaining constant the pH of the microclimate in the gastrointestinal tract despite the change of feeds during the first phase of postnatal life. El objetivo del estudio fue determinar el pH de la superficie de la mucosa de los compartimentos estomacales y de los segmentos intestinales en los primeros 45 días de vida postnatal en la alpaca (Vicugna pacos). Se trabajó con 33 animales, procedentes de los departamentos de Puno y Cusco, desde el nacimiento (recién nacido - RN) hasta los 45 días de edad. Los animales fueron distribuidos en siete grupos etarios. El pH se determinó con un pH metro Metrohm 826 mobile con electrodo plano especial para membranas. Los animales fueron sacrificados y el tracto gastrointestinal fue delimitado en 13 porciones. En cada porción se hizo una apertura de 8 cm para determinar el pH de forma directa sobre la mucosa. El pH en los compartimentos 1, 2 y 3 porción abomaso fue menor en los RN (p<0.05), se incrementó en la primera semana de edad y se mantuvo constante hasta los 45 días de edad. El pH en las porciones intestinales fue constante en los grupos etarios, aunque se observó una ligera tendencia a la acidez en el intestino delgado y una tendencia a la neutralidad en el intestino grueso, lo que sugiere que las alpacas de estas edades tienen diversos mecanismos homeostáticos que mantienen constante el pH del microclima en todo el tracto gastrointestinal a pesar de los cambios en la alimentación durante su desarrollo inicial. Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria 2012-03-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article application/pdf https://revistasinvestigacion.unmsm.edu.pe/index.php/veterinaria/article/view/878 10.15381/rivep.v23i1.878 Revista de Investigaciones Veterinarias del Perú; Vol. 23 No. 1 (2012); 20-26 Revista de Investigaciones Veterinarias del Perú; Vol. 23 Núm. 1 (2012); 20-26 1682-3419 1609-9117 spa https://revistasinvestigacion.unmsm.edu.pe/index.php/veterinaria/article/view/878/704 Derechos de autor 2012 María Vásquez C., José Rodríguez G., Boris Lira M., Sergio Cueva M., Milder Ayón S., Yenny Mallma D. https://creativecommons.org/licenses/by-nc-sa/4.0 |
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Vásquez C., María Rodríguez G., José Lira M., Boris Cueva M., Sergio Ayón S., Milder Mallma D., Yenny |
spellingShingle |
Vásquez C., María Rodríguez G., José Lira M., Boris Cueva M., Sergio Ayón S., Milder Mallma D., Yenny pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
author_facet |
Vásquez C., María Rodríguez G., José Lira M., Boris Cueva M., Sergio Ayón S., Milder Mallma D., Yenny |
author_sort |
Vásquez C., María |
title |
pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
title_short |
pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
title_full |
pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
title_fullStr |
pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
title_full_unstemmed |
pH of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
title_sort |
ph of the luminal surface of the gastrointestinal mucosa of baby alpacas during the first weeks of age |
description |
The objective of this study was to determine the pH in the luminal mucosa of the gastric compartments and intestinal segments during the first 45 postnatal days of age in the alpaca (Vicugna pacos). Thirty three alpacas from birth to 45 days of age were distributed in seven age groups. The animals proceeded from the Puno and Cusco departments of Peru. The pH was measured using a 826 pH mobile meter with a special flat electrode for membranes. Animals were slaughtered and the gastrointestinal tract was divided in 13 segments. An 8-cm length opening was done in each segment and pH was directly measured over the mucosa. The pH of compartments 1, 2 and 3 (segment abomasum) was lower at birth (p<0.05), increased during the first week and kept constant until 45 days of age. The pH in the intestinal segments was constant in all age groups, but there was a slight tendency to acidity in the small intestine and a tendency to neutrality in the large intestine. This suggests that alpacas of these ages have homeostatic mechanisms for maintaining constant the pH of the microclimate in the gastrointestinal tract despite the change of feeds during the first phase of postnatal life. |
publisher |
Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria |
publishDate |
2012 |
url |
https://revistasinvestigacion.unmsm.edu.pe/index.php/veterinaria/article/view/878 |
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