Sanitary quality of broiler litter reused

Abstract

Considering the importance of the substrate to bedding in the poultry industry in Brazil, and the enormous pressure on environmental management as to the correct use and management of the waste generated by the production sector, this study aimed to analyze the effect of reuses of two types of litter on sanitary qualities and productive performance of broilers. The study was conducted with litter from 32 different broiler houses, two types of substrates and four cycles of reuses. The litter sanitary quality was verified by the identification of the presence of Escherichia coli and Salmonella spp. and the incidence of footpad dermatitis. It was observed that the coffee hulls litter presented a reduction of 28.61 percentage points in the probability of occurrence of Salmonella spp when compared to the wood shavings litter, nevertheless, no statistical difference was observed on bacterial occurrence with Salmonella spp. for litter of different types or numbers of reutilization. The presence of Escherichia coli was detected in litter of all cycles, for both types of substrate. The occurrence of footpad lesions was detected for both types of litter, and was influenced by the number of reutilization cycles of the litter. The degree of incidence was detected only for the litter with coffee hull in which there was an increase of 30% between the first and second reuse from which tended to stabilize.KEYWORDS: Salmonella spp., E. coli, footpad, productive performance. QUALIDADE SANITÁRIA DE CAMAS DE FRANGO DE CORTE REUTILIZADASRESUMO: Considerando a importância do substrato para cama na avicultura industrial do Brasil e a enorme pressão relativa à gestão ambiental quanto ao correto emprego e manejo dos resíduos gerados pelo setor produtivo, buscou-se analisar o efeito das reutilizações de dois tipos de substratos de cama na qualidade sanitária e no desempenho produtivo dos animais. A pesquisa foi realizada em 32 aviários no Estado de Minas Gerais, e dois tipos de substratos e quatro ciclos de reutilização foram analisados. A qualidade sanitária da cama foi avaliada pela identificação das bactérias Escherichia coli e Salmonella spp., e incidência de dermatites no coxim plantar. Verificou-se que a cama de casca de café apresentou redução de 28,61 pontos percentuais na probabilidade de ocorrência de Salmonella spp quando comparada com a cama de maravalha, porém não houve diferença significativa entre os ciclos de reutilização das mesmas. Observou-se presença de Escherichia coli em todos os ciclos de reutilização das camas, em ambos os substratos. Houve ocorrências de lesões do coxim plantar para as camas avaliadas, sendo que, somente para a cama de casca de café, o número de reutilizações influenciou na incidência dessas lesões, aumentando 30% entre o primeiro e o segundo ciclos de reutilização a partir do qual houve tendência à estabilização.

Additives to Control the Quality of Coffee Husk Poultry Litter

“…The litter of wood shavings showed the highest value, 1.32 x10 12 CFU g -1 , which coincides, however, with the treatment of highest moisture content (39.64%). Vieira et al (2015), when studying the sanitary quality of broiler litter, mention that an increase of 1% in the moisture content generates an increase of 11.25 percentage points in the probability of occurrence of Salmonella spp in the coffee husk litter.…”

High-Frequency Detection of fosA3 and blaCTX–M–55 Genes in Escherichia coli From Longitudinal Monitoring in Broiler Chicken Farms

“…Curiously in our research, poultry litter did not have the high number of resistance when compared with day-old chicken sample. The use of the same poultry litter in subsequent production cycles, when subjected to a sanitary vacuum and a good fermentation process, may result in a low microbial load ( Wei et al, 2013 ; Vieira et al, 2015 ; Waziri and Kaltungo, 2017 ; Gurmessa et al, 2021 ; Moffo et al, 2021 ; Yévenes et al, 2021 ). In Brazil, poultry litter is reused for more than one consecutive batch, and this practice is allowed if sanitary problems have not occurred with the batches housed on the poultry litter to be reused ( Waziri and Kaltungo, 2017 ).…”

Effect of Ammonia Gas in Poultry Litter Contaminated with Salmonella Heidelberg

“…Due to its high prevalence, resistance to antimicrobials and difficult control, Salmonella Heidelberg has been isolated and reported in Brazil, from poultry and products derived from chicken meat since 1962. Salmonella stands out as one of the main serovars causing infections in humans worldwide, occupying the fourth position among the most isolated ones (Vieira et al, 2009;Vieira et al, 2015). In recent years, a higher incidence of Salmonella enterica subspecies enterica serovar Heidelberg (S. Heidelberg) has been observed in poultry houses and processing plants by Salmonella control and monitoring programs (Ferrari et al, 2019).…”