Samples taken from seams and cracks in the house came back Salmonel- la-positive, so they all had to be sealed.
control of the styrofoam beetle is an important requirement to be free of Salmonella, says the Salmonella expert.
Beetle strip Cleaning and disinfecting is always done according to proto- col. At the end of each flock the manure is removed and the house is sprayed clean. Then the house is degreased: a very important step according to Van Beers. Following which it is sprayed clean again and finally, the house is properly disin- fected. Jansen disinfects with chlorine. “Over the years we have tested various products and we saw major differences in
effectiveness. Chlorine turned out to be one of the best disinfectants and gives very good results,” Van Beers reports. In combatting the darkling beetle there was one measure taken that topped all the others in terms of its effectiveness. The Dutch broiler farmer installed a contiguous beetle strip on the walls, running all around them at a height of about 1.5 metres. “This beetle strip prevents any beetles crawling into the wall and roof insulation,” Jansen explains. After one year of consistently applying these measures two of Jansen’s poultry houses were Salmonella-free by October 2018. Unfortunately, house number 3 remained Salmonella positive. It took until April 2019 before this house finally test- ed negative, too. “We are pleased that we could finally get house 3 free of Salmonella by consistently applying these measures and consistently sampling,” says Van Beers. By me- ticulously examining their methods and procedures Jansen and Van Beers finally discovered why house number 3 re- mained infected for so long. “It turned out that there were still some seams and cracks that had not be properly addressed. They have since been re-sealed,” Van Beers reports. To maintain a clear overview of his Salmonella status, Jansen continues to take Salmonella samples every week. “We at Heus Voeders have already developed our own sam- pling set, specifically for Salmonella samples. This what Jansen uses, of course. We have also developed a compre- hensive checklist whereby the poultry farmer can check off what needs to be cleaned and disinfected, and see how to take the Salmonella samples,” Van Beers concludes. Jansen consistently continues to carry out extremely thorough cleaning and disinfection to ensure he can maintain his hard-earned Salmonella-free status.
Heus Voeders has already de- veloped its own sampling set specifically for Salmonella.
20 ▶ POULTRY WORLD | No. 4, 2020
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