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بررسی مولکولی و بیوشیمیایی نقش استرپتوکوکوس اینیایی در تلفات باس دریایی آسیایی پرورشی (Lates calcarifer) در قفسهای پرورشی خلیج فارس | ||
فصلنامه علمی زیست شناسی جانوری تجربی | ||
دوره 9، شماره 3 - شماره پیاپی 35، بهمن 1399، صفحه 19-27 اصل مقاله (373.08 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.30473/eab.2020.49886.1757 | ||
نویسندگان | ||
فریدون حسنی* 1؛ رحیم پیغان2، 3؛ مجتبی علیشاهی2، 4؛ مسعود قربانپور5؛ مینا آهنگرزاده6 | ||
1دکتری، بهداشت آبزیان، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز | ||
2استاد، گروه علوم درمانگاهی، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز | ||
3قطب بهداشت و بیماریهای ماهیان گرمابی | ||
4قطب بهداشت و بیماریهای ماهیان گرمابی | ||
5استاد، گروه پاتوبیولوژی، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز | ||
6استادیار، سازمان تحقیقات آموزش و ترویج کشاورزی، مؤسسه تحقیقات علوم شیلاتی کشور، پژوهشکده آبزیپروری جنوب کشور، اهواز، ایران | ||
چکیده | ||
استرپتوکوکوس اینیایی باکتری گرم مثبتی است که باعث عفونتهای تهاجمی همراه با سپتیسمی و مننژیت شدید و تلفات اقتصادی بالا در ماهیان آب شیرین و دریایی میشود. استرپتوکوکوزیس یکی از مهمترین بیماریهای عفونی در ماهی باس دریایی آسیایی میباشد. هدف از تحقیق حاضر، بررسی نقش این باکتری در تلفات ماهیان باس دریایی در قفسهای پرورشی سواحل شمالی خلیجفارس بود. در این مطالعه در مجموع از تعداد 150 قطعه ماهی باسدریاییآسیایی پرورشی (60 قطعه ماهی مشکوک به عفونت باکتریایی و تعداد 90 قطعه ماهی به ظاهر سالم) از مزارع فعال در استانهای بوشهر، خوزستان و هرمزگان نمونه باکتریایی از کلیه قدامی و مغز تهیه گردید. بعد از جداسازی و خالص سازی باکتریها، با استفاده از تستهای بیوشیمیایی و روش مولکولی (با پرایمرهای اختصاصی ژن lctO) حضور باکتری استرپتوکوکوس اینیایی مورد بررسی قرار گرفت. نتایج PCR و تعیین توالی محصول PCR نشاندهنده میزان شیوع بالای استرپتوکوکوس اینیایی در قفسهای پرورش ماهی باسدریایی آسیایی در دریای خلیج فارس است. بنابراین لازم است اقدامات مؤثر در خصوص پیشگیری از بیماری استرپتوکوکوزیس (بهویژه واکسیناسیون) انجام گردد. | ||
کلیدواژهها | ||
استرپتوکوکوس اینیایی؛ باسدریاییآسیایی؛ پرورش در قفس؛ PCR | ||
عنوان مقاله [English] | ||
Molecular and biochemical investigation of the role of streptococcus iniae in mortality of Lates calcarifer cages culturing in the Persian Gulf | ||
نویسندگان [English] | ||
Fereydun Hassani1؛ Rahim Peyghan2، 3؛ Mojtaba Alishahi2، 4؛ Masoud Ghorbanpour5؛ Mina Ahangarzadeh6 | ||
1Ph.D. of Aquatic Animal Health, Faculty of Veterinary, Shahid Chamran University of Ahvaz, Iran | ||
2Professor, Department of clinical Sciences, Faculty of Veterinary, Shahid Chamran University of Ahvaz, Iran | ||
3Professor, Department of clinical Sciences, Faculty of Veterinary, Shahid Chamran University of Ahvaz, Iran | ||
4Professor, Department of clinical Sciences, Faculty of Veterinary, Shahid Chamran University of Ahvaz, Iran | ||
5Professor, Department of pathobiology, Faculty of Veterinary, Shahid Chamran University of Ahvaz, Iran | ||
6Assistant Professor, Agricultural Education and Extension Research Organization, Fisheries Science Research Institute, South IRAN Aquaculture Research Center,Ahvaz, Iran | ||
چکیده [English] | ||
Streptococcus iniae is a gram-positive bacterium that causes invasive infections with severe septicemia and meningitis as well as high economic losses in freshwater and sea fish. It is one of the most infectious diseases in Asian sea bass. The purpose of the present study was to investigate the role of this bacterium in marine bass fish mortality in farmed cages on the northern coast of the Persian Gulf. In this study, a number of 150 cultured Asian sea bass (60 fish suspected of bacterial infection and 90 apparently healthy fish) were selected and bacterial sampling were taken from head kidneys and brain of fish from sea bass cages of Bushehr, Khuzestan and Hormozgan provinces. After isolation and purification of the bacteria, the presence of Streptococcus iniae was evaluated and confirmed via biochemical tests and molecular methods (with specific primers of lctO gene). The PCR results and sequencing of the PCR product indicate high prevalence of Streptococcus iniae in Asian sea bass cages culturing in the Persian Gulf. Therefore, effective measures should be taken to prevent Streptococcosis (especially vaccination). | ||
کلیدواژهها [English] | ||
Asian sea bass, cages culture, PCR, Streptococcus iniae | ||
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