DETECTION of ANTIBODIES AGAINST Mycoplasma Capricolum Subsp
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View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by KhartoumSpace DETECTION OF ANTIBODIES AGAINST Mycoplasma capricolum subsp. capripneumoniae IN SERA COLLECTED FROM GOATS IN KHARTOUM STATE By Gasim Mohammed Abuidris Elmustafa (B.Sc.V., University of Khartoum, 1999) Supervisor Dr. Ahmed Zaki Saad Ahmed Zaki A thesis submitted to the University of Khartoum in partial fulfillment of the requirements for M.Sc. Degree in Microbiology By courses and complementary research Department of Microbiology Faculty of Veterinary Medicine University of Khartoum September 2007 Preface This study was carried out at the Department of Microbiology, Faculty of Veterinary Science, University of Khartoum under the supervision of Dr. Ahmed Zaki Saad i Dedication To my beloved father and mother To my beloved family To my closed friends. With love…. ii ACKNOWLEDGEMENT I am indebted to “Allah” who granted me everything including the mind, health and patience to accomplish this work. I would like to express my deepest appreciation and sincere gratitude to my supervisor Dr. Ahmed Zaki Saad for his guidance, valuable advices, suggestions and kind supervision throughout the study period. A lot of thanks are expressed to all members of Microbiology laboratory; Faculty of Veterinary Medicine; University of Khartoum for their valuable help. iii Least but not last, my deep gratefulness are due to my colleagues Ali Elkarrar and Mohammed Elfadil for their help, patience, and encouragement throughout the period of the study. iv Abstract The main goal of this research was to study the prevalence of contagious caprine pleuropneumonia (CCPP) in Khartoum State. A total of 160 serum samples were collected from different areas in the State and investigated for antibodies (Abs) against Mycoplasma capricolum subsp. capripneumoniae (Mccp) using agar gel immunodiffusion (AGID) and indirect haemagglutination (IHA) tests. Sonicated SDS-treated soluble antigen was the most suitable antigen preparation for AGID compared to whole cell or cell debris SDS-treated antigens. 60% of samples were found positive with AGID whereas 63.75% of samples were found positive with IHA respectively. All IHA positive sera with antibody titre ≥ 1/8 were found positive with AGID. Regardless of sex and age all animals are equally affected. Foreign goat breeds were more susceptible to infection than local ones. v It was concluded from the study that CCPP was widely distributed in Khartoum State and further work should be done to isolate the causative agent. vi ﻤﻠﺨﺹ ﺍﻷﻁﺭﻭﺤﺔ ﻫﺩﻑ ﻫﺫﺍ ﺍﻟﺒﺤﺙ ﺇﻟﻲ ﺩﺭﺍﺴﺔ ﻤﺩﻱ ﺍﻨﺘﺸﺎ ﺭ ﻤﺭﺽ ﺫﺍ ﺕ ﺍﻟﺭﺌـﺔ ﻭﺍﻟﺠﻨـﺏ ﺍﻟﺴﺎﺭﻱ ﻓﻲ ﺍﻟﻤﺎﻋﺯ ﻓﻲ ﻭﻻﻴﺔ ﺍﻟﺨﺭﻁﻭﻡ. ﺘﻡ ﺠﻤﻊ 160 ﻋﻴﻨﺔ ﻤﺼﻠﻴﺔ ﻤﻥ ﺍﻟﻤﺎﻋﺯ ﻤﻥ ﻤﺨﺘﻠﻑ ﺍﻟﻤﻨﺎﻁﻕ ﺒﺎﻟﻭﻻﻴﺔ ﻭﺘﻡ ﻓﺤﺼﻬﺎ ﻤﻌﻤﻠﻴﺎ ﻟﻠﻜﺸﻑ ﻋـﻥ ﻭﺠـﻭﺩ ﺍﻷﺠـﺴﺎﻡ ﺍﻟﻤـﻀﺎﺩﺓ ﻟـﺴﺒﺏ ﺍﻟﻤـﺭﺽ capricolum sub sp capripneumoniae ) (Mycoplasma ﺒﻭﺍﺴﻁﺔ ﺍﺨﺘﺒﺎﺭﻱ ﺍﻻﻨﺘﺸﺎﺭ ﺍﻟﻤﻨﺎﻋﻲ ﺍﻟﻤ ﺯﺩﻭﺝ ﻓﻲ ﺃﺠﺎﺭ ﺍﻟﺠل ﻭ ﺍﺨﺘﺒﺎﺭ ﺍﻟـﺘﻼﺯﻥ ﺍﻟﻐﻴﺭ ﻤﺒﺎﺸﺭ. ﻟﻘﺩ ﻭﺠﺩ ﺇﻥ ﺍﻟﻤﺴﺘﻀﺩ ﺍﻟﺫﻱ ﺘـﻡ ﺘﻜـﺴﻴﺭﻩ ﺒﻭﺍﺴـﻁﺔ ﺍل (Sonicator) ﻭﻋﻭﻟﺞ ﺒﻭﺍﺴﻁﺔ (Sodium dodecyl suphate)ﻫﻭ ﺍﻷﻨﺴﺏ ﻻﺨﺘﺒﺎﺭ ﺍﻻﻨﺘﺸﺎﺭ ﺍﻟﻤﻨﺎﻋﻲ ﺍﻟﻤﺯﺩﻭﺝ ﻓﻲ ﺃﺠﺎﺭ ﺍﻟﺠل ﻋﻨﺩ ﻤﻘﺎﺭﻨﺘﻪ ﺒﻤﺴﺘﺤﻀﺭﺍﺕ ﻤﺴﺘﻀﺩﻴﺔ ﺍﺨﺭﻱ. 60% ﻤﻥ ﺍﻟﻌﻴﻨﺎﺕ ﻗﺩ ﻭﺠﺩﺕ ﻋﻨﺩ ﺍﺨﺘﺒﺎﺭﻫﺎ ﺒﻭﺍﺴﻁﺔ ﺍﺨﺘﺒـﺎﺭ ﺍﻻﻨﺘـﺸﺎﺭ ﺍﻟﻤﻨﺎﻋﻲ ﺍﻟﻤﺯﺩﻭﺝ ﻓﻲ ﺃﺠﺎﺭ ﺍﻟﺠل ﺒﻴﻨﻤﺎ 63.75% ﻗـﺩ ﻭﺠـﺩﺕ ﻤﻭﺠﺒـﺔ ﻋﻨـﺩ ﺍﺨﺘﺒﺎﺭﻫﺎ ﺒﻭﺍﺴﻁﺔ ﺍﺨﺘﺒﺎﺭ ﺍﻟﺘﻼﺯﻥ ﺍﻟﻐﻴﺭ ﻤﺒﺎﺸﺭ . ﻭﺠﺩﺕ ﺃﻥ ﻜل ﺍﻟﻌﻴﻨﺎﺕ ﺍﻟﺘـﻲ ﺘﺤﺘﻭﻱ ﻋﻠﻲ ﺘﺭﻜﻴﺯ ﺠﺴﻡ ﻤﻀﺎﺩ ⅛ ﻓﺎﻜﺜﺭ ﻋﻨﺩ ﻓﺤﺼﻬﺎ ﺒﺎﺨﺘﺒﺎﺭ ﺍﻟـﺘﻼﺯﻥ ﺍﻟﻐﻴـﺭ ﻤﺒﺎﺸﺭ ﺘﻜﻭﻥ ﻤﻭﺠﺒﺔ ﻋﻨﺩ ﺍﺨﺘﺒﺎ ﺭﻫﺎ ﺒﻭﺍﺴﻁﺔ ﺍﺨﺘﺒﺎﺭ ﺍﻻﻨﺘﺸﺎﺭ ﺍﻟﻤﻨﺎﻋﻲ ﺍﻟﻤـﺯﺩﻭﺝ ﻓﻲ ﺃﺠﺎﺭ ﺍﻟﺠل . vii ﺃﻭﻀﺤﺕ ﺍﻟﺩﺭﺍﺴﺔ ﺃﻥ ﻜل ﺍﻟﺤﻴﻭﺍﻨﺎﺕ ﻤﻌﺭﻀﺔ ﻟﻺﺼﺎﺒﺔ ﺒﺼﺭﻑ ﺍﻟﻨﻅـﺭ ﻋﻥ ﻋﻤﺭﻫﺎ ﻭﺠﻨﺴﻬﺎ ﻟﻜﻥ ﺍﺘﻀﺢ ﺃﻥ ﺍﻟﺴﻼﻻﺕ ﺍﻷﺠﻨﺒﻴﺔ ﺃﻜﺜﺭ ﻋﺭﻀﺔ ﻟﻺﺼـﺎﺒﺔ ﻤﻥ ﺍﻟﻤﺤﻠﻴﺔ. ﺨﻠﺼﺕ ﺍﻟﺩﺭﺍﺴﺔ ﺇﻟﻲ ﺃﻥ ﺍﻟﻤﺭﺽ ﻤﻨﺘﺸﺭ ﻓﻲ ﻜل ﻭﻻﻴﺔ ﺍﻟﺨﺭﻁﻭﻡ ﻭﻴﻘﺘﺭﺡ ﺇﺠﺭﺍﺀ ﻤﺯﻴﺩ ﻤﻥ ﺍﻟﺒﺤﺙ ﻟﻌﺯل ﻤﺴﺒﺏ ﺍﻟﻤﺭﺽ ﺒﺎﻟﻭﻻﻴﺔ. viii LIST OF CONTENTS Preface ……………………………………………………………… i Dedication ii ……………………………………………………………… Acknowledgment iii ………………………………………………………. English Abstract iv ………………………………………………………... Arabic abstract……………………………………………………….. v List of contents vii ………………………………………………………… List of tables xi …………………………………………………………… List of figures.. xii List of Plates xii …………………………………………………………… Introduction 1 ……………………………………………………………. Chapter One: Literature Review 3 1.1 Contagious caprine pleuropneumonia ………………... 3 1.1.1 Definition………………………………………………. 3 1.2 History…………………………………………………. 3 1.3 Causative agent……………………………………….... 3 1.4 8 Classification 1.5 Epidemiology …………………………………………. 8 1.5.1 Host range …………………………………………….. 8 1.5.1.1. Goats of Sudan ………………………………………... 9 1.5.1.2 Breeds …………………………………………………. 9 1.5.1.2.1 Sudanese Nubian goats ……………………………….. 9 1.5.1.2.2. Sudanese desert goats ………………………………… 9 1.5.1.2.3. The Nilotic goats 10 1.5.1.2.4. Saanen 10 1.5.1.2.5. Damascus 10 1.5.2. Transmission 12 1.5.3. Distribution 12` 1.6. Clinical signs 14 1.7s. Pathology 15 ix 17.1. Gross lesions 15 1.7.2. Histopathology 16 1.8. Molecular epidemiology 16 1.9. Diagnosis 17 1.9.1. Field Diagnosis 17 1.9.2. Specimens for Laboratory 18 1.9.3. Laboratory Diagnosis 18 1.9.4. Differential Diagnosis 20 1.10. Disease Prevention and Control 20 1.11. Control and Eradication 21 1.12. Immunology 22 1.13. Serology 22 1.13.1. Serological identification 23 1.13.1.1. Growth inhibition test (GIT) 23 1.13.1.2. Immunofluorescence tests (IF) 23 1.13.2. Serological tests 23 1.13.2.1 Immunodiffusion 23 1.13.2.2. Indirect (Passive) hem agglutination test (IHA) 24 1.13.2.3. Latex agglutination test (LAT) 25 1.13.2.3.1. Polysaccharide-specific antibody-detection (LAT) 25 1.13.2.3.2. polysaccharide-specific antigen-detection (LAT) 25 1.13.2.4. Complement fixation test (CFT) 26 1.13.2.5. Enzyme linked immunosorbent assay (ELISA) 26 1.13.2.6. Polyacrylamide gel electrophoresis (PAGE) and 27 immunobloting CHAPTER TWO: Materials and Methods 29 2.1 Samples ……………………………………………. 29 x 2.1.1. Collection of samples ………………………………… 29 2.1.2. Separation of serum 30 2.2. Mccp strains 30 2.2.1. Growth medium 30 2.2.1.1. Medium ingredients 30 2.2.1.1.1. Horse serum 30 2.2.1.1.2. Fresh yeast extract 31 2.2.1.1.3. Glucose solution 31 2.2.1.1.4. Penicillin solution 31 2.2.1.1.5. Thallium acetate 10% (w/v) 31 2.2.1.1.6. Sodium pyruvate 32 2.2.1.2. Modified Hayfilick’s medium 32 2..2.3. Cultivation of Mccp 33 2.2.4. Harvesting and washing of cells 33 2.2.5. Sonication of Mccp cells 33 2.2.6. SDS treatment 34 2.3. Serological test 34 2.3.1. Agar gel immundiffusion test (AGID) 34 2.3.1.1. Material 34 2.3.1.1.1. Antigens 34 2.3.1.1.2. Serum samples 34 2.3.1.1.3. Phosphate buffered saline (PBS) 35 2.3.1.1.4. Other substances 35 2.3.1.2. Method 35 xi 2.3.1.2.1 Preparation of the gel 35 2.3.1.2.2. Test procedure 36 2.3.2. Indirect haemagglutination test (IHA) 37 2.3.2.1. Materials 37 2.3.2.1.1. Antigen 37 2.3.2.1.2. Serum samples 37 2.3.2.1.3. Sheep red blood cells (SRBC) 37 2.3.2.1.4. Normal saline 37 2.3.2.1.5. Phosphate buffered saline (PBS) 37 2.3.2.1.6. Others substances 37 2.3.2.2. Method 38 2.3.2.2.1. Test procedure 38 CHAPTER THREE RESULTS 40 3.1 Selection of antigen for AGID 40 3.2 Detection of antibodies against Mccp 40 3.3 Distribution of CCP in Khartoum State 43 3.4. CCPP in different goat breeds 45 3.5. CCPP in different age groups of goats 47 3.6. CCPP in different sex of goats 49 CHAPTER FOUR DISCUSSION 52 Conclusion 55 Recommendations 55 REFERENCE 56 xii LIST OF TABLES Table Page 1.1 Mycoplasmas, Including M. capricolum subsp. 6 capripneumoniae, Isolated from Small Ruminants with Respiratory Disease (Nicolas, 2002) 1.2 Major Biochemical Differences between Mycoplasmas 7 of Small Ruminants (Nicolas, 2002) 1.3 Distribution of CCPP (Nicolas, 2002) 14 2.1 Samples collected from different areas in Khartoum 29 State. 3.1 Comparison of results of the two tests. Result of IHA 41 was recorded as strong positive, weak positive and negative 3.2 Distribution of CCP different areas of Khartoum State 43 3.3 Antibodies against Mccp in different goat breeds in 45 Khartoum state: 3.4 47 CCPP in different age groups of goats 3.5 CCPP in different goat’s sex 49 LIST OF FIGURES Figure Page 2.1 Loading of wells with different reagents in the AGID 36 xiii test 3.1 Distribution of CCPP in Khartoum State 44 3.2 Antibodies against Mccp in different breeds of goats in 46 Khartoum State 3.3 Antibodies against Mccp in different age groups of 48 goats 3.4 CCPP in different goat sexes in Khartoum state. 50 LIST OF PLATES Plate Page 1.4.1.1. Goats of Sudan 11 3.1 Selection of antigen for AGID 42 3 AGID test for goat serum samples collected from 51 Khartoum State xiv Introduction: Contagious caprine pleuropneumonia (CCPP) is a major disease of goats in Africa, Middle East and western Asia. It is both highly contagious and particularly virulent with up to 100% and 70% morbidity and mortality rates respectively in susceptible herds. The disease, which is caused by Mycoplasma capriculum subsp. capripnemoniae (Mccp), results in major economic losses to goats industry in nearly 40 countries; hence it is placed by the OIE in list B, which includes the important disease from economic standpoint. While clinical disease has so far been reported in 38 countries, only 11 countries have isolated the causative organism, principally because Mccp is difficult to culture. In the Sudan, the disease is known Abu nini and it was described in the Sudan Veterinary Report since 1902 (Anon, 1902).