Next Article in Journal
In Vitro Neutral Detergent Cellulase Method and Chemical Composition to Predict In Vivo Fermentable Organic Matter of Roughages
Previous Article in Journal
Effect of Media with Different Glycerol Concentrations on Sheep Red Blood Cells’ Viability In Vitro
Article

Good to Know: Baseline Data on Feed Intake, Fecal Pellet Output and Intestinal Transit Time in Guinea Pig as a Frequently Used Model in Gastrointestinal Research

Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany
*
Author to whom correspondence should be addressed.
Animals 2021, 11(6), 1593; https://doi.org/10.3390/ani11061593
Received: 31 March 2021 / Revised: 13 May 2021 / Accepted: 26 May 2021 / Published: 28 May 2021
Guinea pigs are frequently used in gastrointestinal research, but knowledge on basic parameters connected with gastrointestinal physiological functions, including feed intake, fecal pellet output (FPO) and intestinal transit time, is incomplete. Recording such parameters in single- and pair-housed guinea pigs over 24 h revealed that they exhibit a diurnal feeding behavior, with peaks during the beginning and end of the light period, and FPO mirroring periods, with a defecation break during the night. In addition, we assessed transit time with a non-absorbable marker, counting approximately 5 h. Our findings can help to build a baseline data basis, important in the field of functional gastrointestinal animal physiology.
Guinea pigs are a traditional and frequently used species in gastrointestinal research. Comprehensive knowledge of basic parameters connected with their intestinal function, such as feed intake, fecal pellet output and gastrointestinal transit time, is important for evaluating results from basic gastrointestinal research that may be applied to practical problems in human and veterinary medicine, for example, when establishing diagnostic tools. Our study revealed that over a 24-h period, single-housed guinea pigs showed a continual but day-accentuated feeding activity, consuming 57% of the total feed during the light period, with pronounced peaks of feed intake during the beginning and end of the light period. This was mirrored by fecal pellet output during the light period and almost no defecation during the dark period, while potential coprophagy not measured in this study needs to be considered. A highly comparable feeding activity was recorded in pair-housed guinea pigs, with 60% of overall feed intake within the light period, indicating that such differences in housing conditions did not influence guinea pigs’ feeding behavior. Intestinal transit time was successfully recorded by oral administration of carmine red and counted 5 h on average. Hence, this study provides important information on the basic functional parameters of guinea pigs’ gastrointestinal tract physiology. View Full-Text
Keywords: guinea pig; feeding pattern; fecal pellet output; intestinal transit time; carmine red; gastroenterology guinea pig; feeding pattern; fecal pellet output; intestinal transit time; carmine red; gastroenterology
Show Figures

Figure 1

MDPI and ACS Style

Elfers, K.; Armbrecht, Y.; Mazzuoli-Weber, G. Good to Know: Baseline Data on Feed Intake, Fecal Pellet Output and Intestinal Transit Time in Guinea Pig as a Frequently Used Model in Gastrointestinal Research. Animals 2021, 11, 1593. https://doi.org/10.3390/ani11061593

AMA Style

Elfers K, Armbrecht Y, Mazzuoli-Weber G. Good to Know: Baseline Data on Feed Intake, Fecal Pellet Output and Intestinal Transit Time in Guinea Pig as a Frequently Used Model in Gastrointestinal Research. Animals. 2021; 11(6):1593. https://doi.org/10.3390/ani11061593

Chicago/Turabian Style

Elfers, Kristin, Yvonne Armbrecht, and Gemma Mazzuoli-Weber. 2021. "Good to Know: Baseline Data on Feed Intake, Fecal Pellet Output and Intestinal Transit Time in Guinea Pig as a Frequently Used Model in Gastrointestinal Research" Animals 11, no. 6: 1593. https://doi.org/10.3390/ani11061593

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop