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- Chu, Weiping, et al. Show all 6 Authors
- Veterinary microbiology 2018 v.220 pp. 97-106
- Holstein; Salmonella; bacteria; barcoding; clones; feces; feedlots; founder effect; gastrointestinal system; genome; high-throughput nucleotide sequencing; lymph nodes; population size; steers; travel
- ... Feedlot cattle often contain Salmonella. The number of bacteria that initiate colonization of different cattle organs and the bacterial migration within these large animals are poorly understood. To investigate these questions, we constructed wild-type isogenic tagged strains (WITS) of Salmonella by inserting 21-base barcodes flanked by Illumina sequencing primers into a neutral genome location. W ...
- Chu, Weiping, et al. Show all 3 Authors
- Applied and environmental microbiology 2007 v.73 no.20 pp. 6468-6474
- Human enterovirus; coastal water; conservation areas; environmental quality; groundwater contamination; humans; indicator species; polymerase chain reaction; recreation; storms; summer; vertebrate viruses; watersheds; California
- ... Recent studies have shown that the fecal indicator bacteria (FIB) currently used to indicate water quality in the coastal environment may be inadequate to reflect human viral contamination. Coliphage was suggested as a better indicator of human viral pollution and was proposed by the U.S. EPA as an alternative indicator for fecal pollution in groundwater. In this study, we investigated the occurre ...
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- Chu, Weiping, et al. Show all 8 Authors
- Applied microbiology and biotechnology 2007 v.76 no.4 pp. 927-934
- Adenoviridae; Enterococcus; Escherichia coli; Human enterovirus; antibiotic resistance; birds; coliform bacteria; cows; drainage water; feces; genes; humans; indicator species; pollution; polymerase chain reaction; rabbits; soil; soil amendments; storms; subwatersheds; summer; wild animals; California
- ... Three independent microbial source tracking (MST) methods were applied to a small urban subwatershed in Orange County, California. Fifty-seven water samples collected over summer 2002 were analyzed for human adenovirus and enterovirus. Enterococci and E. coli were isolated for antibiotic resistance analysis (ARA) and for PCR identification of human- and animal-specific toxin genes, respectively. A ...