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عزل وتشخيص اميبا Acanthamoeba castellani ودراسة تاثيرها الممرض في الفئران المختبرية Mus musculus سلالة Balb/C == Isolation and Detection of Acanthamoeba castellani. and study their pathological effect on laboratory mice Mus musculus Balb \C strain
Author name:
شيماء عبد الرزاق حميد
Supervisor name:
مسلم عبد الرحمن محمد
General topic:
Biology
Specific topic:
Microbiology - Parasites
Degree:
Master
University:
University Of Basrah - College Of Science - Department Of Biology
Language:
Arabic
University location:
Basrah
First pages:
24T3552 - p.pdf
Abstract:
free_living species of amoeba belongs to the genus Acanthamoeba was recorded in the recent study , this species was classified as A. castellani was according to the morphological features , cultural properties , heat tolerance and osmosis .Astromoeba was also recorded that characterized by its star - shape and Naegleria spp. which isolated from environmental samples ,both are free living amoeba .Acanthamoeba was isolated from different environments , includings water and soil from various regions of Basrah Provinace and from gathered water in air - cooler basin and discarded water from air conditioning systems .It was isolated from the eyes of out - patients who were suffered from eye problemes and from healthy volunteers.Several culture media were used for parasite culturing including media S, Agar, PYG, Mix , Mud , Heat - killed E.coli coated agar ,Lock and Manitol media.The media differ in their capability for the parasite growth depending on their nutrients ingrediants and the suitable temperature for the growth ,and the high rate for the growth was on S medium 37◦C and there is increasing in the parasite size that it is a new medium and used for the first time .The PYG medium at 37◦C also cause a good growth for the parasite .The parasite susceptibility to Dexonium was examined in vitro which shows the activity of the drug against the parasite .The activity of other drugs including Cisplatin , Pentostam , Chloromphenicol , Methadin , Cifran and Genedin was examined in this study .Cifran and Cisplatin shows a close effect and less than others ,while Methadin does not affect on the parasite ,in other hand Chloramphenicol caused obvious malformation in the parasite and retardation in the numbers.The recent study showed the death dose for half of the lab mice infected with the parasite was 450 amoeba/ml.The study also proved that the parasite is one of the major causes for Blinding ,causes it invades the mice eyes and blinds them moreover it cause skin lesions , hypertrophy in spleen and kidneys and bleeding in brain and lungs .Different ways used in the infecting of mice by the parasite caused the death of them in two - four dayes ,The chronic infection cause death in long period.The parasite can infect the brain when it is injected in different ways through optic nerve ,peritonium ,veins , nose and skin ,in which it caused necrosis .The presence of the trophozoite and cyst cause WBC infeltration.The liver ,kidneys and lungs were also infected when the parasite injected through the optic nerve , peritonium ,veins ,nose and skin and caused necrosis , bleeding patches , gathering of the defence cells (WBC).
