Concomitant uptake of antimicrobials and Salmonella in soil and into lettuce following wastewater irrigation

J. Brett Sallach, Yuping Zhang, Laurie Hodges, Daniel D Snow, Xu Li, Shannon L Bartelt-Hunt

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The use of wastewater for irrigation may introduce antimicrobials and human pathogens into the food supply through vegetative uptake. The objective of this study was to investigate the uptake of three antimicrobials and Salmonella in two lettuce cultivars. After repeated subirrigation with synthetic wastewater, lettuce leaves and soil were collected at three sequential harvests. The internalization frequency of Salmonella in lettuce was low. A soil horizon-influenced Salmonella concentration gradient was determined with concentrations in bottom soil 2 log CFU/g higher than in top soil. Lincomycin and sulfamethoxazole were recovered from lettuce leaves at concentrations as high as 822 ng/g and 125 ng/g fresh weight, respectively. Antimicrobial concentrations in lettuce decreased from the first to the third harvest suggesting that the plant growth rate may exceed antimicrobial uptake rates. Accumulation of antimicrobials was significantly different between cultivars demonstrating a subspecies level variation in uptake of antibiotics in lettuce.

Original languageEnglish (US)
Pages (from-to)269-277
Number of pages9
JournalEnvironmental Pollution
Volume197
DOIs
StatePublished - Feb 2015

Fingerprint

Lettuce
Salmonella
Waste Water
Irrigation
Wastewater
Soil
Soils
Subirrigation
Food supply
Lincomycin
Sulfamethoxazole
Pathogens
Antibiotics
Food Supply
Anti-Bacterial Agents
Weights and Measures
Growth

Keywords

  • Antimicrobial
  • Lettuce
  • Salmonella
  • Uptake
  • Wastewater irrigation

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Concomitant uptake of antimicrobials and Salmonella in soil and into lettuce following wastewater irrigation. / Sallach, J. Brett; Zhang, Yuping; Hodges, Laurie; Snow, Daniel D; Li, Xu; Bartelt-Hunt, Shannon L.

In: Environmental Pollution, Vol. 197, 02.2015, p. 269-277.

Research output: Contribution to journalArticle

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