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Effect of Polypropylene Microplastic and Florfenicol Antibiotic on Some Hormonal and Haematological Biomarkers in Yellowfin Seabream (Acanthopagrus latus)
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Researchers studied the combined effects of polypropylene microplastics and the antibiotic florfenicol on blood and hormone markers in yellowfin seabream. They found that exposure to both pollutants together caused more pronounced changes in cortisol, thyroid hormones, and blood cell counts than either substance alone. The study suggests that the co-occurrence of microplastics and antibiotics in marine environments may create compounding health effects in fish.
Microplastics (MPs) and antibiotics, such as florfenicol (FFC), are emerging pollutants affecting aquatic ecosystems. This research examined the separate and joint impacts of MPs and FFC on hematological and hormonal indicators in yellowfin seabream (Acanthopagrus latus). The fish were categorized into four groups according to their dietary treatments: a control group with a standard diet and three experimental groups receiving diets containing 15 mg/kg of FFC, 100 mg/kg of MPs, or both for 10-day. The ELISA method was used to measure hormones in plasma. Blood collection occurred on the first, fourth, seventh, and fourteenth days after feeding stopped to evaluate FFC concentration in the plasma and various hematological and hormonal parameters. Exposure to FFC and MPs, alone or together, considerably decreased red blood cell, hemoglobin levels, hematocrit values, mean corpuscular hemoglobin, mean corpuscular hemoglobin, white blood cell, lymphocyte, and erythropoietin concentrations. Neutrophil and cortisol levels increased. Mean corpuscular volume was elevated only in the group receiving both FFC and MPs. After a 14- day recovery period, all measured parameters returned to baseline levels in the FFC-only group. Co-exposed group showed the highest concentration of FFC in the plasma on the first day. The groups administered MPs, individually or collectively, exhibited a reduction in thyroid hormones. These findings indicate that both MPs and FFC induce anemia and stress in yellowfin seabream, with co-exposure exacerbating these effects. Although the toxic effects of FFC were temporary, the lasting presence of MPs indicates potential long-term risks.
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Researchers exposed yellowfin seabream to microplastics and the antibiotic florfenicol, both individually and in combination, over a 10-day period. They found that microplastics elevated cholesterol, glucose, and liver enzyme levels while suppressing immune markers in both blood and skin mucus. The combined exposure to microplastics and florfenicol produced more severe and longer-lasting effects than the antibiotic alone.
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Researchers studied how microplastics interact with the antibiotic florfenicol to affect detoxification enzymes and oxidative stress in yellowfin seabream. They found that combined exposure to both pollutants caused more pronounced liver damage and oxidative stress than either substance alone, and that recovery took longer. The study suggests that microplastics can worsen the toxic effects of antibiotics used in aquaculture.
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