Exposição experimental ao fungicida agrícola difenoconazol e seus efeitos sobre a qualidade espermática.

Abstract

Difenoconazole, a fungicide of the triazoles group, is widely used during the cultivation of passion fruit, orange, strawberry, papaya and other crops. Respiratory return and in the public health space, as it can affect the population through the consumption of contaminated food. Thus, the present study was evaluated as an experimental challenge on sperm quality, from an experimental model. For this, Wistar males (45 days) were divided into 4 experimental groups (n = 10 / group): control and exposed to 5 (DA), 10 (DB) and 50 (DC) mg / kg / day of diphenoconazole, via gavage for 30 consecutive days. During the exposure period, the animals were followed for clinical signs of toxicity, water and feed intake and body weight. Throughout this period, the reproductive organs, liver and kidneys were collected and weighed. Spermatozoa were submitted to evaluation of motility, morphology, vitality, acrosome and Surface Enhanced Raman Spectroscopy (SERS). The testis and epididymis were scaled for sperm counts. For the original network learning test, the Bayes classifier (BAY), K-Nearest Neighbors (K-NN) and Support Vector Machine (SVM). The results were compared by ANOVA with Tukey posterior test, and the Kruskall-Wallis test with Dunn a posteriori, considering p <0.05. Body weight and reproductive organs, liver and culture are not altered during exposure to the fungicide. The progressive motility, the acrosomal membrane and the percentage of spermatozoa were the variables used in the variables DB and DC in relation to the joint control. Already vitality was only doubled in the DC group. In addition, sperm indices were not tested and were reduced in the three groups exposed. SERS measurements resulted in changes in the sperm bands of the DC group in relation to the control. The computational analysis identified the presence of a standard for the experimental groups with good classification in the SVM test (≥ 80% accuracy). Thus, the exposure of Wistar rats to doses of the difenoconazole fungicide may be reduced by reducing the sperm quality, with the classification pattern of exposure groups.