Determination of Pathogenicity of Bacteria Isolated from Some Aquatic Amphibian and Reptile Species

IF 0.5 4区 生物学 Q4 BIOLOGY
İ. Karakaş, N. Hacıoğlu Doğru, Ç. Gül, M. Tosunoğlu
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Abstract

Microflora of reptiles and amphibians pose a serious threat to the environment and humans, as these bacteria are more resistant to antimicrobials or have more virulence factors. In this study, we focused on the characterization of Gram-negative bacterial isolates obtained from Mauremys rivulata (Western Caspian turtle), Natrix natrix (Grass snake), Natrix tessellata (Dice snake) and Pelophylax bedriagae (Levantine frog) using cultural methods and determine some virulence factors (antibiotic resistance, VanA and TetM resistant genes, biofilm, siderophore and some enzymatic activities etc.). Multiple antibiotic resistance (MAR) and virulence index (VI) of each strain were also calculated. A total of 85 Gram-negative isolates exhibited varying levels of antibiotic resistance and the ability to produce one or more extracellular enzymes such as amylase, lecithinase, protease, lipase, hemolysis, siderophore, amino acid decarboxylase and DNase. Although the TetM has been identified in all 7 isolates, none of the isolates have shown the presence of the VanA gene. According to MAR and VI results, most of the isolates were found to be in the high threat group and these indexes were correlated with antibiotic resistance. The study data revealed that chemicals used in industry and agriculture both trigger environmental pollution and pose risk factors for wildlife.

Abstract Image

确定从一些水生两栖动物和爬行动物物种中分离出来的细菌的致病性
摘要 爬行动物和两栖动物的微生物菌群对环境和人类构成了严重威胁,因为这些细菌对抗菌药具有更强的抗药性或具有更多的致病因子。在这项研究中,我们重点使用培养方法分析了从 Mauremys rivulata(西里海龟)、Natrix natrix(草蛇)、Natrix tessellata(骰子蛇)和 Pelophylax bedriagae(阆中蛙)分离的革兰氏阴性细菌的特征,并确定了一些毒力因子(抗生素耐药性、VanA 和 TetM 耐药基因、生物膜、嗜苷酸和一些酶活性等)。此外,还计算了各菌株的多重抗生素耐药性(MAR)和毒力指数(VI)。共有 85 株革兰氏阴性分离菌株表现出不同程度的抗生素耐药性,并能产生一种或多种胞外酶,如淀粉酶、卵磷脂酶、蛋白酶、脂肪酶、溶血酶、嗜苷酸酶、氨基酸脱羧酶和脱氧核糖核酸酶。虽然在所有 7 个分离物中都发现了 TetM 基因,但没有一个分离物显示存在 VanA 基因。根据 MAR 和 VI 结果,发现大多数分离物属于高威胁组,这些指数与抗生素耐药性相关。研究数据显示,工业和农业中使用的化学品都会引发环境污染,并对野生动物构成危险因素。
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来源期刊
Biology Bulletin
Biology Bulletin 生物-生物学
CiteScore
0.70
自引率
20.00%
发文量
84
审稿时长
4-8 weeks
期刊介绍: Biology Bulletin (Izvestiya Rossiiskoi Akademii Nauk – Seriya Biologicheskaya) is an interdisciplinary journal of general biology. It focuses on fundamental studies in the fields of cell biology, biochemistry, zoology, botany, physiology, and ecology. This journal publishes current materials of experimental studies and surveys on current problems in general biology. It also publishes information on scientific conferences and new books in the fields of general biology.
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