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Distribution and Accumulative Pattern of Tetracyclines and Sulfonamides in Edible Vegetables of Cucumber, Tomato, and Lettuce
Veterinary
antibiotics can be released to environment by the animals’
excretions, which thereby poses human health and ecological risks.
Six antibiotics (tetracycline, oxytetracycline, chlortetracycline,
sulfamethazine, sulfamethoxazole, and sulfadimethoxine) at three concentrations
(5, 10, and 20 mg kg<sup>–1</sup> soil) were employed in pots
filled with a loamy sand upland soil. Three types of vegetable seedlings,
including cucumber (Cucumis sativus), cherry tomato (Solanum lycopersicum), and lettuce (Lactuca sativa), were
also cultivated during 45 d in the greenhouse. All antibiotics taken
up by tested plants showed negative effects on growth. Relatively
high levels of tetracyclines and sulfonamides (SAs) were detected
in the nonedible parts, roots, and leaves of cucumber and tomato,
but fruit parts accumulated them lower than acceptable daily intake.
Indeed, cucumber roots accumulated SAs by up to 94.6% of total addition
(at 5 mg kg<sup>–1</sup> soil)