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In Vitro Animal Fermentation Model Development
BioVenic provides in vitro animal fermentation model development services for establishing gastrointestinal microbiota simulation systems to support prebiotic and probiotic development and the study of probiotic–nutrition–microbe interactions. Our platform covers the major model types — batch and continuous fermentation systems — with species-specific solutions for both monogastric and ruminant animals. We support comprehensive model construction and optimization, including inoculum preparation and immobilization, pH and retention-time control, nutritive medium development, and microbial and metabolite profiling (SCFA, BCFA, ammonia) via colorimetric, HPLC, GC, and NMR platforms.
In Vitro Fermentation Model Development by Animals
Monogastric Animal In Vitro Fermentation Model Development
A monogastric animal possesses a single-chambered stomach. Common examples of monogastric animals are horses, pigs, dogs, and cats. Monogastric herbivores exhibit enhanced fiber digestion capabilities, attributed to their expansive cecum. With extensive experience in exploring monogastric animal fermentation physiology, BioVenic offers tailored in vitro fermentation model development solutions to animal nutrition researchers. Our specialized in vitro fermentation model for monogastric animals concentrates on simulating microbial fermentation processes within the large intestine and cecum, providing valuable insights for research purposes.
Ruminant Animal In Vitro Fermentation Model Development
Ruminant animals possess a complex four-chambered stomach. Common examples of ruminants include cattle, goats, and sheep. Exploring ruminant animal in vitro fermentation models holds promise for developing novel additives that can modulate microbial populations within the rumen. This approach aims to decrease greenhouse gas emissions and minimize energy and protein losses. Building on strong collaborations with both academic and industrial partners engaged in rumen in vitro fermentation studies, our technology platform offers a range of tailored solutions for ruminant animal in vitro fermentation model development. Find more detailed information through the following link.
In Vitro Fermentation Model Development by Model Types
In Vitro Batch Fermentation Models
The primary goal of in vitro batch fermentation models is to assess the fermentation capabilities of gastrointestinal ecosystems with a particular substrate. This process takes place in enclosed systems, mixing a defined amount of substrate with microbial inoculum and allowing them to ferment for a set duration.
- Advantages: Fast, inexpensive, easy to operate, reproducible, high throughput and automatable. It allows for the minimization of the required media volume and test compounds.
- Limitations: Limited in terms of experimental duration and the amount of substrate supply to avoid negative feedback mechanisms, highly dependent on the inoculation density.
In Vitro Continuous Fermentation Models
In vitro continuous fermentation models are specifically designed to facilitate a continuous and controlled fermentation process within a system. This model replicates the continuous flow of materials, enabling long-term experiments to access steady-state conditions.
- Advantages: Superior in modeling the dynamic nature of the gastrointestinal tract. Allows the adaptation of various parameters, including dilution rate, retention time, pH and temperature to meet and maintain optimal growth conditions. Facilitates studies on the modulation of microbial composition and activity.
- Limitations: expensive equipment, longer experimental period.
In Vitro Fermentation Model Development One-stop Solutions
Our one-stop solutions help in the design and construction of in vitro fermentation models that are suitable for different experimental purposes for researchers in the field of animal nutrition.
- Inoculum Preparation Solutions
The successful inoculation and colonization of in vitro fermentation systems are crucial factors that affect the reproducibility of studies, presenting a significant challenge for these models. Drawing upon our expertise in the development of animal in vitro fermentation models, we are dedicated to assisting you in preparing appropriate inoculums tailored to your specific requirements for animal in vitro fermentation research.
- Inoculum Obtaining Solutions
Animal in vitro fermentation models commonly utilize various types of inoculums, such as feces, cecal content, rumen content, and more. At our facility, we maintain strict supervision over the inoculant acquisition process. This includes implementing measures to minimize the use of antibiotics in donor animals, ensuring an anaerobic environment throughout the sampling process, minimizing external bacterial contamination, and employing appropriate pre-treatment methods for the collected samples. These meticulous steps help ensure the integrity and reliability of the inoculums used in our animal in vitro fermentation models.
- Inoculum Immobilization
BioVenic's immobilization technique helps to immobilize inoculums on different carriers to achieve high cell density, maintain bacterial diversity and high stability over extended in vitro fermentation periods.
- pH Solutions
We offer a complete solution for pH control throughout the fermentation process, including pH measurement of inoculants, pH adjustment of culture media, and pH monitoring during the fermentation process.
- Retention Time Solutions
Retention time is a crucial factor that significantly impacts the in vitro fermentation process. It is particularly influential in the degradation of proteins by gut bacteria and can influence the fermentation of carbohydrates. Our solution enables you to determine the specific retention time required for your study, allowing you to understand the effects of different retention times on your experimental outcomes. This information is invaluable for optimizing and adjusting your research to achieve desired results.
- Nutritive Medium Development
BioVenic offers nutritive medium development solutions according to your specific needs to mimic the physiological status of the colon, rumen and other gastrointestinal parts.
- In Vitro Fermentation Profile Analysis
BioVenic provides solutions for gas production (e.g. CH4 production) and fermentation rate analysis during animal in vitro fermentation to help researchers better understand the in vitro fermentation process. Our goal is to achieve accurate readings of in vitro gas production and to facilitate the collection of in vitro gas production samples.
- Animal In Vitro Fermentation Metabolite Analysis
BioVenic offers state-of-the-art analytical platforms that can identify and qualify metabolites during animal in vitro fermentation with high resolution. Our techniques include colorimetric assays, immunoassays, HPLC, GC, NMR, etc. By using our metabolomics and proteomics techniques, we can detect multiple metabolites in the same assay. Commonly tested fermentation metabolites include short chain fatty acids (SCFA), branched chain fatty acids (BCFA), ethanol, ammonia N, lactate, etc.
To learn more about services through the link below.
- Animal In Vitro Fermentation Microbial Analysis
We can not only analyze the level of marker microorganisms (e.g., probiotics, harmful bacteria) in the animal in vitro fermentation model for research needs, but also provide you with a comprehensive microbial picture through high-throughput microbiome detection and bioinformatics analysis. The information that can be obtained includes microbial composition, abundance, microecology analysis, correlation analysis, etc. to study the microbial functions and mechanisms of microbial action involved in animal in vitro fermentation models.
Related Research
In a study adapting the in vitro gas production technique for high-concentrate feeding conditions, a modified bicarbonate buffer concentration was developed to simulate ruminal pH environments typical of grain-rich diets. Standard in vitro rumen fermentation systems operate near neutrality (pH 6.5–7.0), failing to replicate the subacute acidotic conditions (pH 5.2–5.8) encountered in high-concentrate-fed ruminants. The modified buffer, combined with rumen inoculum from donor animals adapted to high-concentrate diets, enabled faithful reproduction of low-pH fermentation dynamics. The study further developed a semi-continuous incubation system that controls medium pH and passage rate through manual replacement of incubation medium with fresh buffer—addressing the limitation of closed batch systems that cannot simulate passage kinetics. Gas volume measurements were partitioned into direct (microbial fermentation) and indirect (buffering capacity) components to accurately quantify true fermentation activity. This work establishes methodological advances for in vitro fermentation model development under concentrate-rich conditions, enabling feed evaluation under physiologically relevant ruminal environments.
Fig. 1 Average pattern of incubation pH from substrates incubated with inocula from a concentrate diet or a forage diet.1
Why Choose Us?
With our focus on animal in vitro fermentation, we are able to provide the latest research methods and technologies.
We focus on the research of farm and companion animals and understand the difficulties you face in your research.
We have integrated multiple technology platforms for you to choose from, so you do not have to worry about every part of the experiment.
We take care of every aspect of your experimental design, execution and data analysis, providing you with timely and effective solutions.
Case Study: SCFA Detection Across an In Vitro Animal Fermentation Model
Objective: A feed-additive client developing an in vitro animal fermentation model — using a microbial inoculum to ferment target substrates — needed reliable, time-resolved quantification of the resulting short-chain fatty acids (SCFAs) to characterize how a candidate substrate was metabolized by the consortium. BioVenic provided an SCFA detection service: the client supplied fermentation-broth samples from each time point, and BioVenic ran a standardized detection panel to quantify the SCFA profile.
System: The client's in vitro fermentation platform — comprising gastric, small-intestine, and rumen/large-intestine fermentation simulation stages with a species-appropriate microbial inoculum.
Samples provided by client: Fermentation broth collected at sequential time points across the fermentation course.
BioVenic SCFA detection panel: Acetate, propionate, and butyrate quantification, together with other minor acid profiling, by GC-MS.
Fig. 2 SCFA Profile Across Fermentation
Frequently Asked Questions
Q1: Which animal species and fermentation systems do you support for in vitro fermentation modeling?
A: We build in vitro fermentation models for both monogastric animals (pigs, horses, dogs, cats—with the large intestine and cecum as the main simulated compartments) and ruminants (cattle, sheep, goats—modeling the four-chambered stomach and especially the rumen). We help you choose the format based on your experimental goal—rapid substrate ranking favors batch, while dynamic, multi-day modulation studies favor continuous systems.
Q2: How do you ensure reproducible inoculum and stable colonization of the in vitro system?
A: Reproducibility hinges on the inoculum, so we control the whole chain: donor animals are selected with minimized antibiotic exposure, samples (feces, cecal content, or rumen fluid) are collected strictly under anaerobic conditions to avoid contamination and oxygen shock, and appropriate pre-treatment is applied before use.
Q3: What fermentation endpoints and analytical platforms do you use to characterize the model?
A: We quantify the core fermentation outputs and metabolites with validated platforms: gas production (including CH4) and fermentation rate via dedicated gas-capture and monitoring systems; short-chain fatty acids (SCFA), branched-chain fatty acids (BCFA), lactate, and ethanol by GC (gas chromatography) and HPLC; ammonia-N and other intermediates by colorimetric and immunoassays; and structural/untargeted profiling by NMR and our metabolomics pipeline. Together these readouts capture both the quantity and quality of fermentation—letting you distinguish, for example, beneficial butyrate production from excessive proteolysis or methanogenesis.
Q4: Can you also profile the microbiome and link it to fermentation function?
A: Yes. Beyond metabolite analysis, we provide high-throughput microbiome characterization—typically 16S rRNA amplicon sequencing (Illumina) followed by bioinformatics covering composition, abundance, microecology, and correlation analysis—so you can track marker microorganisms (probiotics vs. harmful taxa) and relate community shifts to the metabolite changes you measure. This end-to-end capability supports prebiotic/probiotic development, feed-additive screening, and studies of probiotic–nutrition–microbe interactions, with pH control, retention-time optimization, and custom nutritive-medium development bundled into the one-stop service.
As a provider of solutions in the field of animal nutrition, BioVenic is eager to establish friendly cooperative relationships with researchers in academia and industry. We are able to provide solutions for in vitro batch fermentation models and in vitro continuous fermentation models. For different animal species, including monogastric and ruminants. If you would like to learn more about our solutions for animal in vitro fermentation development, please contact us and our staff will respond promptly.
Reference
- Amanzougarene, Zahia, and Manuel Fondevila. "Fitting of the in vitro gas production technique to the study of high concentrate diets." Animals 10.10 (2020): 1935. https://doi.org/10.3390/ani10101935. The title was changed to " Average pattern of incubation pH from substrates incubated with inocula from a concentrate diet or a forage diet." Distributed under Open Access license CC BY 4.0.