Feed Enterobacteria management

Business case: This feed mill did it! Safe cost-effective Salmonella reduction

Poultry feed is difficult to decontaminate. A feed miller was looking for alternatives to formaldehyde in order to control Salmonella in layer and breeder feed. The feed miller tried using a gentler method based on organic acids.

Auditing is key

A full Salmonella audit was performed in the entire production system. Samples were taken from dusty spots like sieves, inside of machines and also from the raw materials.

A complete feed safety programme

Together with hygiene advice and dosing equipment, the feed additives of the Selko Fysal range were applied. They were used in whole grains, the grinder and in the mixer. The high level of active ingredients in Fysal assured efficacy despite the high buffer capacity of the feed.

This practical example shows, with a strict control programme, regular expert checks and interventions, it’s possible to reach less than 10³ CFU Enterobacteriaceae without the use of formaldehyde.

Download our article from the January issue of World Poultry on how this feed mill used gentler methods to control Salmonella.

Interested in the Fysal range? Contact your local Trouw Nutrition supplier here 



Enterobacteria, such as Salmonella, can be present in raw materials and final feed, an undesired situation because of the possible effects throughout the feed-to-food chain, including at slaughter house and consumer level. Controlling Salmonella in raw materials reduces cross-contamination.

Selko’s Fysal range of products and services help combat enterobacteria.

Raw material treatment

Fysal is a synergistic blend of organic acids and their ammonium salts, which may reduce enterobacteria like Salmonella in raw materials, with a long-lasting effect. The acids in Fysal are partly buffered, making them less liable to evaporate, and since they stay active over a longer period of time, this may reduce recontamination of feed and raw materials—a clear benefit compared to other treatment strategies. Fysal is available in both liquid and dry form. [read more]

Preservation of feed for reproductive animals

Raw materials like soybean meal and canola (rapeseed) meal are known risk factors for Salmonella contamination in feed. However, Salmonella control is difficult in these materials because their high buffer capacity means that significant doses of chemicals are needed to adequately reduce the enterobacteria. For example, layer feeds are not normally pelletised and have increased buffer capacity due to high levels of calcium carbonate.

Fysal® Feed is formulated to improve Salmonella reduction in raw materials and feeds with a high buffer capacity. The combination of organic acids in Fysal Feed improve Salmonella reduction and lower feed contamination. [read more]

Preservation of feed for production animals

Fysal® Flow is designed for feed for production animals such as broilers, piglets and finishing pigs. Fysal Flow may reduce enterobacteria contamination and recontamination of feed, and compensate moisture losses during the pelletising and drying steps of the feed production process. [read more]


Feed Safety programme: analysis of Salmonella contamination

The Selko® Feed Safety programme includes a Feed Safety audit at the feed mill (monitoring, analysis, serotyping), as well as advice on product application, hygiene and management.

During the Feed Safety audit, the Selko specialist will analyse feed safety by taking samples of the raw materials from all the critical control points (CCPs) of the production process. The main purpose of the audit is to analyse the origin of contamination. In the event of Salmonella, positive samples will also be serotyped to track down the cause of contamination. Product application advice means that the best product is chosen according to the audit, the specification of the feed and the production process. Our hygiene and management advice involves training and advising your staff on how to prevent recontamination.

Selko® E-300 continuous dosing system 

The Selko E-300 is an on-belt or on-conveyor continuous dosing system for treating raw materials. Spray nozzles ensure that Fysal is evenly distributed throughout the feed to control enterobacteria during storage.

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