Rodrigo Gallardo's research while affiliated with University of California, Davis and other places

Publications (5)

Article
Poultry litter is used as soil amendment or organic fertilizer. While poultry litter is enriched with organic matter suitable for land, the presence of pathogens such as Salmonella in poultry litter is a concern. To investigate the effect of gaseous ozone on pathogen reductions in poultry litter, this study conducted a series of experiments that in...
Poster
Full-text available
RNA viruses are hypermutable. Using reovirus as model system for hypermutable virus evolution and reassortment. Avian reovirus (ARV) in meat type chickens manifests as a plethora of clinical signs ranging from runting and stunting to a severe disease characterized by viral tenosynovitis, pericarditis and myocarditis. The strategy to control the dis...
Article
Full-text available
The disposal of by-products, such as poultry litter, and carcasses is a serious issue because of risks associated with microbial pathogens, and controlling the pathogen risks requires identifying improved pre-treatment methods capable of inactivating pathogens. As poultry litter and carcasses are known to be major reservoirs of pathogenic microorga...
Article
Although infectious bronchitis virus (IBV) has been described as one of the most economically important viral respiratory diseases in poultry, there are few analyses of outbreaks that use spatial statistics. In order to better understand how the different genotypes of IBV behave spatially and temporally, we used geographic information system-based...

Citations

... Ozone (O 3 ) is also a strong oxidizing agent and an efficient option for pathogen inactivation (Chang et al., 2020;Girgin Ersoy et al., 2019;Perry et al., 2019) as well as for decolorization, taste and odor control for water reuse (Zhang et al., 2020d). Its performance in disinfection processes of real secondary effluents has not only found to be quite efficient by itself but also substantially improved by synergetic coupling to hydrogen peroxide (H 2 O 2 ) or UV irradiation (Malvestiti and Dantas, 2018). ...
... These results go beyond previous reports, showing that a significant reduction of Escherichia coli can be reached, not only through application of chemicals, such as alum, which reduced the E. coli count by 2 logs CFU/g (application of alum on sawdust bedding from commercial broiler house after 4 flock cycles [78]). Still, even more significant than in our study, were reported in prior studies that investigated the heat treatment (35-65 • C) of litter collected from poultry houses (mainly rice hulls), which resulted in a 2-6 log reduction of the initial E. coli concentration in lab scale conditions [51,79]. However, it should be noted that the advantage of including parts of medicinal plants in the bedding materials is that they potentially offer antimicrobial properties during the whole production process, while other approaches, e.g., application of alum or heat treatment, can be applied only after the finished production cycle. ...
... An IBV hot spot was detected around the city of Livingston, which has the highest density of birds of all the locations investigated. The same region has been previously detected as a hot spot for IBV from 2008 to 2012 (41). Some of the other IBV hot spots were in Tulare, where one of the diagnostic laboratories is located. ...