Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Prevalence, diagnosis and experimental challenge of Dermocystidium sp. infection in Nile tilapia (Oreochromis niloticus) in Egypt
Faculty
Veterinary Medicine
Year:
2019
Type of Publication:
ZU Hosted
Pages:
Authors:
Heba Hassan hosny
Staff Zu Site
Abstract In Staff Site
Journal:
Aquaculture Elsevier
Volume:
Keywords :
Prevalence, diagnosis , experimental challenge , Dermocystidium sp. infection
Abstract:
This study confirms the systemic position of Dermocystidium sp. in Nile tilapia (Oreochromis niloticus) internal organs (liver, spleen, kidneys, stomach and intestine). Our work reveals an entire approach for Dermocystidium sp. including prevalence, diagnosis, spores multiplication, experimental infection and histopathological examination. A total of 1388 Nile tilapia (766 cultured fish and 622 wild fish) were collected from May 2012 to May 2014 and screened for Dermocystidium infection. The total prevalence of infection was 35.5% and was higher in wild (45%) than cultured fish (27.8%). The highest rates of infection were recorded in the largest fish and in winter. Several different techniques were employed to detect and identify Dermocystidium sp. from the internal organs of infected hosts including macroscopic examination, microscopic observation of tissue squashes, histological examination and in vitro culture. Infected fish were sluggish and suffered from severe ulceration and black discoloration of the skin. The post-mortem lesion included dark-grayish nodules on internal organs, particularly the liver. Squash preparations from the internal organs revealed spherical spores (signet-ring shape), which is characteristic for Dermocystidium sp. The spores showed multiplication in the freshly dead host tissue. Our study demonstrated new successful attempts for in vitro culture of Dermocystidium either on Eagle’s Minimum Essential Medium after adjusting pH of media to 3.5 or on Sabouraud's dextrose agar media enriched with duck decoction 10%. Experimental infection revealed that intra-gastric route was more pathogenic than the immersion route. In histopathological sections from infected fish tissue following natural and experimental infection, spherical spores of Dermocystidium were embedded in the affected tissue. To the best of our knowledge, this study represents the first report of Dermocystidium infection in wild Nile tilapia in Egypt
Author Related Publications
Heba Hassan hosny, "Impact of silver nanoparticles exposure on neuro-behavior, hematology, and oxidative stress biomarkers of African catfish (Clarias gariepinus)", Elsevier, 2021
More
Heba Hassan hosny, "Synthesis and Characterization of AntibacterialCarbopol/ZnO Hybrid Nanoparticles Gel", MDPI, 2021
More
Heba Hassan hosny, "Chemically and Green Synthesized ZnO Nanoparticles AlterKey Immunological Molecules in Common Carp(Cyprinus carpio) Skin Mucus", MDPI, 2021
More
Heba Hassan hosny, "Physiological Performance, Antioxidant and Immune Status, Columnaris Resistance, and Growth of Nile Tilapia That Received Alchemilla vulgaris-Supplemented Diets", MDPI, 2022
More
Heba Hassan hosny, "Branchiomycosis in nile tilapia (oreochromis niloticus) in behira governorate with trials for treatment", Zagazig university, 2014
More
Department Related Publications
Mohamed Alsayed Hassanin, "تقييم الحماية المتبادلة للقاحات المختلفة المعدة من الايروموناس هيدروفيلا والسيدوموناس فلورسنس ضد التسمم الدموي المسبب بالايروموناس والسيدوموناس في البلطي النيلي", Abbassa Int. J. Aqua, 2013
More
Mohamed Alsayed Hassanin, "التأثير الغذائي للجنزبيل على كفاءة النمو, الاستجابة المناعية لأسماك البلطي النيلي ومقاومة الاصابة بالايروموناس هيدروفيلا", Abbassa Int. J. Aqua, 2013
More
Mohamed Alsayed Hassanin, "التأثير المزمن للمبيد الحشري فينتروثيون على صحة اصبعيات البلطي النيلي والمؤشرات الحيوية للأكسدة", Zag. Vet. J., 2014
More
Mohamed Alsayed Hassanin, "تأثير بعض اضافات الأعلاف على صحة ونمو البلطى النيلى", Zag. Vet. J., 2010
More
Mohamed Alsayed Hassanin, "دراسة تأثير الاستبدال الجزئي للذرة الصفراء بقشر الرمان مع اضافة او عدم اضافة الانزيمات على كفاءة النمو و الحالة الصحية لأسماك البلطي النيلي", World Journal of Fish and Marine Sciences, 2014
More
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف