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Tetracyclines environment

The application of various antibiotics such as rifampicin/tetracycline (63), cefatoxime/trimethoprim (64), or bacteriostatic compounds such as Micropur (Roth, Karlsruhe, Germany) (65) used for root pretreatment or added to collection media is another strategy to prevent biodegradation during root exudate collection. However, depending on dosage and plant species, also phytotoxic effects of antibiotics have been reported (Table 3). Antibiotics in the soil environment... [Pg.49]

In a recent study, Walters et al. [141] described the occurrence and loss of several PhC from biosolid-soil mixtures exposed at ambient outdoor conditions for 3 years. Some compounds showed no detectable loss over the monitoring period, including diphenhydramine, fluoxetine, thiabendazole and triclosan, while half-life estimates ranging from 182 to 3,466 days were determined for others such as azithromycin, carbamazepine, ciprofloxacin, doxycycline, tetracycline, 4-epitetracycline, gemfibrozil, norfloxacin and triclosan. These findings highlight the potential use of T. versicolor to reduce the impact of biosolids once released to the environment, which could reduce the concentrations of PhC in much shorter periods of treatment. [Pg.151]

Macrolide antibiotics (clarithromycin, dehydroerythromycin, etc.) and sulfonamides (sulfamethoxazole, sulfadimethoxine, sulfamethazine, and sulfathi-azole) are the most prevalent antibiotics found in the environment with levels around a few micrograms per liter, whereas fluoroquinolones, tetracyclines, and penicillins have been detected in fewer cases and usually at low concentrations (nanograms per liter) [3,20,23,72]. This result is not surprising, since penicillins are easily hydrolyzed and tetracyclines readily precipitate with cations such as calcium and are accumulated in sewage sludge or sediments. Several reviews have reported the environmental occurrence of different antibiotics in aquatic and soil compartments. Some of these data are detailed in Table 1. [Pg.199]

Tetracyclines are broad-spectrum antibiotics with activity against Gram-positive and Gram-negative bacteria that have been widely used for the treatment of infectious diseases in veterinary and human medicine, as well as additives in animal foodstuffs. Normally tetracyclines are not found at high levels in the environment because they readily precipitate with cations such as calcium and are accumulated in sewage sludge or sediments [3,20,26]. [Pg.213]

Gu C, Karthikeyan KG (2008) Sorption of the antibiotic tetracycline to humic-mineral complexes. J Environ Qual 37 704-711... [Pg.168]

Werner JJ, Arnold WA, McNeill K (2006) Water hardness as a photochemical parameter tetracycline photolysis as a function of calcium concentration, magnesium concentration, and pH. Environ Sci Technol 40 7236-7241... [Pg.168]

Peak N, Knapp CW, Yang RK et al (2007) Abundance of six tetracycline resistance genes in waste water lagoons at cattle feedlots with different antibiotic use strategies. Environ Microbiol 9(1) 143-151... [Pg.206]

Kazimierczak KA, Scott KP, Kelly D et al (2009) Tetracycline resistome of the organic pig gut. Appl Environ Microbiol 75(6) 1717-1722... [Pg.206]

Erythromycin, another macrolide, is rapidly transformed to anhydro-erythromycin in the environment (Hirsch et ah, 1999). A recent study by Chander et al. (2005) compared the sorption of tetracycline and tylosin in two soils that differ in clay and organic matter content. The adsorption of each of the antibiotics was higher in the soil that has a higher clay and organic matter content as these soil traits also provide greater exchange capacity (Fig. 3.8). Those workers speculated that the larger tylosin molecules (MW = 916.1) are adsorbed on the surface of the clay... [Pg.141]

Rhodes G., G. Huys, J. Swings, P. Mcgarm, M. Hiney, P. Smith, and R.W. Pickup (2000). Distribution of oxytetracycline resistance plasmids between aeromonads in hospital and aquaculture environments Implication of Tni 721 in dissemination of the tetracycline resistance determinant Tet A. Applied and Environmental Microbiology 66 3883-3890. [Pg.281]

Sithole B.B. and R.D. Guy (1987b). Models for tetracycline in aquatic environments. [Pg.284]

Different behavior of tetracyclines and sulfonamides in sandy soils after repeated fertilization with liquid manure. Environ. Toxicol. Chem., 24 (4), 861-868. [Pg.273]

Kim, S., P. Eichhom, J.N. Jensen, et al. 2005. Removal of antibiotics in wastewater Effect of hydraulic and solid retention times on the fate of tetracycline in the activated sludge process. Environ. Sci. Technol. 39 5816-5823. [Pg.184]

In the first model, we sought to reveal subgraphs of a biological interaction network that show substantial adaptations when cells transcriptionally respond to a changing environment or treatment. As a case study, we investigated the response of the malaria parasite Plasmodium falciparum to chloroquine and tetracycline treatments. [Pg.42]


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