{"id":5940,"date":"2025-08-05T14:36:07","date_gmt":"2025-08-05T09:36:07","guid":{"rendered":"https:\/\/vetnewsandviews.com\/en\/?p=5940"},"modified":"2025-08-05T14:51:58","modified_gmt":"2025-08-05T09:51:58","slug":"the-role-and-significance-of-fermentation-in-animals-2","status":"publish","type":"post","link":"https:\/\/vetnewsandviews.com\/en\/the-role-and-significance-of-fermentation-in-animals-2\/","title":{"rendered":"The Role and Significance of Fermentation in Animals"},"content":{"rendered":"\n\t\t\t

Dr. Muhammad Nadeem<\/strong> Sarwar<\/strong>
DVM, MSc. (Hons) Microbiology (UAF)
Poultry Disease Management, University of Arkansas, USA<\/p>

CEO:<\/strong>
Sanna Laborateries
Zuram Brothers
Silantro Advance Care (Pvt) Ltd<\/p>

In the last decades, many scientists and researcher are trying to exploring the opportunities to improve animal health, well-being, and performance through fermentation. In the last two decades, fermentation technology has gained good achievements in improving feed quality, feed utilization efficiency and promoting animal health. Fermentation technologies such as microbial-based fermentation and precision fermentation can improve feed digestibility by changing the physicochemical properties of the feed substrate, thus ensuring animal health and high quality production. <\/p>

Metabolites produced during fermentation help in the breakdown of nutrients, improve their digestibility and bio-availability. This will result in efficient utilization of feed, reducing waste and improve feed conversion.<\/p>

Fermentation plays an important role in the variety of livestock species which includes Cattles, Sheep,Goat, Horses, Poultry and Fisheries. What so ever is the specie, fermentation plays a crucial role in the improvement of animal health, well-being and performance by increasing digestibility and bioavailability of the feed ingredients.<\/p>\t\t\t

1. FERMENTATION IN RUMINANTS<\/h2>\t\t

Ruminants have four compartments which include Rumen, Reticulum, Omasum and Abomasum.<\/p>

Fermentation occurs in Rumen through microbes called ruminal fermentation. Rumen fermentation is a process that converts ingested feed into energy sources for the animals. Fiber scratches the rumen wall to start a series of contractions. These contractions lead to rumination, which is the process that physically breaks down the fiber source. Feed is then regurgitated, chewed and swallowed usually 50 to 70 times during rumination before passing through the next compartment of the stomach.<\/p>

Microbial populations ferment feed and water into volatile fatty acids (VFA) i.e. Acetic Acid, Butyric acid and propionic acid and gases (methane and carbon dioxide). When fermentable carbohydrate in the diet is digested too rapidly, the bacteria will increase the production of both VFA and lactic acid. To sustain growth and the activity of fibrolytic microbes, it is crucial to maintain ruminal pH above 5.8, which will prevent the decline of fiber digestion and subsequent proble<\/p>\t\t\t\t\t

\n\t\t\tRumen Microbiota\n\t\t<\/h3>\n\t\t\t\t\t\t\t

\n\t\t\tBacteria:\n\t\t<\/h4>\n\t\t

Rumen bacteria account for 1010 organism\/ml of rumen fluid. By volume, they comprise up to 50% of the total microbial biomass. Bacteria species are an important source of microbial protein, which supply the ruminant with 75-80% of its metabolizable protein. Bacteria are also important for producing enzymes that digest fiber (cellulose, hemicellulose), starch and sugars.<\/p>\t\t\t\t\t

\n\t\t\tProtozoa:\n\t\t<\/h4>\n\t\t

Ciliate protozoa are organisms larger than bacteria and account for 106 organisms \/ ml of rumen fluid. However, most of them degrade proteins very efficiently and release ammonia, so they can waste dietary protein. These proteins represent around 25% of the microbial protein available for the animal.<\/p>\t\t\t\t\t

\n\t\t\tFungi:\n\t\t<\/h4>\n\t\t

Rumen fungi comprise up to 8-10% of microbial biomass and are strictly anaerobic. They play an essential role in fiber digestion This physical action to plant cell walls, can facilitate access to more digestible tissues and help release polysaccharides, which are linked to lignin increasing the pool of digestible energy for the rumen microbiota.<\/p>\t\t\t\t\t

\n\t\t\tArchaea:\n\t\t<\/h4>\n\t\t

This group of microorganisms is involved in methane (CH4) production from a limited range of substrates. They are thus called methanogenic Archaea are considered as very strict anaerobes and use some of the fermentation products, notably H2 and CO2, to form CH4 which is eructated by the ruminant animal.<\/p>\t\t\t

2. FERMENTATION IN HORSES<\/h2>\t\t

Horses are single stomach (monogastric) herbivores that evolved to graze on fiber-rich roughage. Their unique digestive system consists of a foregut and hindgut, each with different functions for breaking down feed and absorbing nutrients. The stomach and small intestines, which make up the foregut, are responsible for digesting proteins, fats, and non-fibrous carbohydrates in the horse\u2019s diet. This happens through mechanical action and chemical reactions facilitated by enzymes.<\/p>

The hindgut, consisting of the cecum and colon, is where the digestion of fibrous carbohydrates takes place. Bacteria help synthesize nutrients and convert this fibre into usable energy through fermentation. The process of hindgut fermentation allows the horse to extract nutrients from plant material which are not digestible in the small intestine.<\/p>

Because of their specialized digestive system, fibrous forages should comprise the largest percentage of your horse\u2019s diet. Feeding horses too much sugar and starch from grain-based feeds can disrupt digestive
processes in the hindgut and cause gut problems.<\/p>\t\t\t

What is Hindgut Fermentation in Horse?<\/h2>\t\t

The main purpose of the hindgut is to ferment the complex and structural carbohydrates found in the horse\u2019s diet. Structural carbohydrates include fiber components in the plant cell wall, such as cellulose and hemicellulose. Complex but fermentable carbohydrates include pectin, beta-glucan, plant sugars and fructans, largely found within the plant cell.<\/p>

In horses, fiber and complex carbohydrates from fresh grass and hay are digested via fermentation by microbes residing in the hindgut. Feeding a diet rich in structural and complex carbohydrates helps to promote optimal digestion and the transit of feed through the equine gastrointestinal tract (GIT). Hindgut fermentation produces volatile fatty acids (VFAs) that serve as a significant energy source for horses. Most of a horse\u2019s energy requirements should be met through fiber fermentation in the hindgut. <\/p>

Microbial fermentation also produces B-vitamins and amino acids. These B-vitamins can be absorbed and meet the horse\u2019s requirements. Methane, carbon dioxide, and water are also produced by fermentation in the hindgut.<\/p>\t\t\t\t\t

\n\t\t\tFermentation Products\n\t\t<\/h3>\n\t\t

When the microorganisms in a horse\u2019s hindgut ferment fiber and other complex plant carbohydrates, they produce substances such as volatile fatty acids, which are a source of energy for the horse. The most common VFAs produced in the equine gut are acetate, propionate, and butyrate. These fatty acids provide approximately 70% of the horse\u2019s energy supply.<\/p>

In addition to VFAs, the fermentation process also produces lactic acid, which can be used to make glucose as another energy source. While some lactic acid is normal, excessive amounts can lead to digestive issues and imbalances in the microbial populations. [3] The production of VFAs and lactic acid in the hindgut results in slower energy release than the rapid breakdown of soluble carbohydrates and
starch in the foregut.<\/p>

Additional by-products of bacterial fermentation in the hindgut include B-vitamins (riboflavin, niacin, biotin, folate, B12, and B6) and amino acids (primarily used by microbes and not absorbed in significant quantities).<\/p>\t\t\t\t\t

\n\t\t\tComposition of Hindgut Microbiota\n\t\t<\/h3>\n\t\t

The equine hindgut is home to a diverse community of microorganisms including bacteria, protozoa (single-celled organisms), and fungi. These microorganisms work together in a symbiotic relationship with the horse, aiding in the fermentation of fibrous materials. The activities of these
microorganisms allow horses to digest and extract energy and nutrients from fibrous feed in the hindgut.<\/p>

The hindgut contains a more uniform range of bacteria compared to the stomach and small intestine, which host a more diverse bacterial population. The diversity of bacteria present in the foregut is due to the ingestion of a high volume of forage. Lactic acid bacteria comprise most of the microbiota in the large intestine. These bacteria produce the majority of volatile fatty acids (VFA) needed for energy.<\/p>\t\t\t\t\t

\n\t\t\tBacteria (Main Players)\n\t\t<\/h3>\n\t\t\t\t\t\t\t

\n\t\t\tCellulolytic bacteria\n\t\t<\/h4>\n\t\t\t\t\t\t\t