050 Effects of nitro treatment on Salmonella, Escherichia coli, and nitrogen metabolism during composting of poultry litter

Arzola, C.; Ledezma-Perez, E. J.; Anderson, R. C.; Hume, M. E.; Ruiz-Barrera, Oscar; Corral-Luna, Agustin; Castillo-Castillo, Yamicela; Byrd, J. A.; Salinas-Chavira, J.; Ontiveros-Magadan, Marina; Rodríguez-Muela, C.

doi:10.2527/asasann.2017.050

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“…Short-chain nitro compounds also have shown bactericidal effects on Salmonella spp., Escherichia spp. and other gastric and intestinal bacteria (Arzola-Alvarez et al, 2016;Arzola et al, 2017;Correa et al, 2017;Ruiz-Barrera et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Influence of Pine Bark Tannin on Bacterial Pathogens Growth and Nitrogen Compounds on Changes in Composted Poultry Litter

Arzola-Alavarez

Castillo-Castillo

Anderson

et al. 2020

Braz. J. Poult. Sci.

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To study the antimicrobial and uric acid-preserving activity of pine bark tannin on poultry litter composting, antibiotic-free wood chipbased poultry litter was distributed (11 g) to 50-mL conical centrifuge tubes and immediately amended with 1.3 mL0.4 M sodium phosphate buffer (control) or with 1.3 mL condensed tannins from pine bark (Pinus palustris; 9 % tannin wt/vol in water). All tubes (n = 3 tubes/treatment) were inoculated with a novobiocin and naladixic acid-resistant Salmonella typhimurium (STNN) to achieve 3.0 log 10 CFU/g and incubated at 37 o C for 3 days to simulate an initial compost period. Wildtype E. coli and the challenge STNN strain as well as concentrations of ammonia, uric acid and urea were measured on days 0 and 3. Pine bark tannin treatment decreased (p<0.01) STNN populations in the litter by 0.6 log units compared to the controls. Wildtype E. coli populations were unaffected by tannin treatment (p>0.05). Ammonia accumulation decreased (p<0.01) 23% in tannin-treated litter compared to the control (2.8 ± 0.1 µmol/g). Conversely, the residual uric acid concentration was 1.6-fold higher (p=0.02) in litter treated with the pine bark tannin than in the control litter. Urea concentrations were unaffected by tannin treatment (p>0.05). Results suggest that pine bark tannin treatment may preserve uric acid and reduce ammonia volatilization in composted litter while aiding Salmonella control.

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Section: Introductionmentioning

confidence: 99%