Broiler recycled litter treatments against Clostridium perfringens and enterobacteria in conventional and dark house systems

Abstract

The objective of this work was to evaluate the effectiveness of quicklime and shallow fermentation applications on the reduction of Clostridium perfringens and enterobacteria in recycled poultry litter, in dark house and conventional systems. Eighty litter samples were evaluated, being divided into four groups: litter treated with quicklime in dark house; litter treated with shallow fermentation and quicklime in dark house; and litter treated with quicklime in conventional broiler house; litter treated with shallow fermentation and quicklime in conventional broiler house. Samples were collected one day before slaughter and five days after litter treatment and were subjected to the quantitative microbiological analysis of enterobacteria and C. perfringens. The bacterial load in pre-treated litter was similar between the dark house and conventional systems. The groups treated only with quicklime showed a significant reduction of enterobacteria in both systems. The reduction of C. perfringens was only observed in the litter group treated with shallow fermentation and quicklime, in conventional broiler house. The use of 500 g m-2 quicklime is the most effective method to reduce enterobacteria load in broiler litter both in the dark house and conventional broiler house systems. The combined treatment of shallow fermentation for seven days with the subsequent application of 500 g m-2 quicklime is efficient for the reduction of C. perfringens in broiler litter, in conventional broiler house.

Association of Bacillus subtilis and Bacillus amyloliquefaciens: minimizes the adverse effects of necrotic enteritis in the gastrointestinal tract and improves zootechnical performance in broiler chickens

“…This infiltrate was associated with the presence of heterophils and areas of hemorrhage at the apex of the villi and cecal tonsil, which were predominant during the period from 8 to 21 d. During the 22- to 29-day period, there was an intensification of inflammation in all intestinal segments, accompanied by the presence of basophilic bacilli indicating bacterial colonization adjacent to the luminal intestinal contents. Furthermore, bacterial clumps were observed adhering and causing microfissures in the lining epithelium of the intestinal mucosa ( Figure 2 ), resembling the necrotic lesions caused by Clostridium perfringens , where the tissue appears hyperemic and with the presence of numerous inflammatory cells, typically heterophilic granulocytes ( Benedet et al, 2021 ).

Figure 1 Photomicrographs of the intestine of birds in the control group (T1).

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Economic efficiency of rearing of young breeder turkeys on reused litter

“…В ід о м а техн ол огія передбачає зн езараж ен н я використан ої підстилки ш ляхом її б іотерм ічної обробки в процесі ком постування в буртах. П ри цьом у в середині буртів розвивається тем п ература до 70оС, щ о при три валій експозиції (3 -7 діб) достатньо для зн еш код ж ен н я більш ості м ікроорганізм ів [4,5]. О днак, деякі автори вказую ть, щ о за такої техн ол огії регенерац ії верхні ш ари під сти л ки не досягаю ть тем п ератури (55оС), необхідної для зн еш код ж ен н я патогенної м ікроф лори.…”

“…Ц і ж п оказники не мали істотни х відм інностей за різн и х сп особів регенерац ії підстилки. 4. Р еген ерац ія п ід стилки із застосуван н ям озон уван н я за використан ня обладнан ня і реж и м ів роботи, щ о застосовувалися, п отребує більш и х в 30 разів ви трат електроенергії, н іж із застосуван н ям у л ьтраф іол етового опром інення.…”

Composting: A biosecurity measure to maximize the benefit of broilers̕ litter

“…Implementing a window of 3 to 5 days for in-house composting between flocks can be a highly effective approach to decreasing microbial and viral loads. By achieving temperatures of 50°C or higher during composting, it becomes possible to significantly reduce or eliminate bacterial counts, mitigate most viral infections, and ultimately enhance bird performance [ 8 ].…”