ارزیابی ایمنی‌زایی واریته تخفیف حدت‌یافته رازی از توکسوپلاسما گوندی در موش Balb/c

نوع مقاله : مقاله کامل

نویسندگان

1 گروه میکروبیولوژی دانشگاه آزاد اسلامی واحد جهرم

2 موسسه تحقیقات واکسن و سرم‌سازی رازی، سازمان تحقیقات، آموزش و ترویج کشاورزی، شیراز، ایران.

3 مربی، گروه میکروبیولوژی ، واحد جهرم ، دانشگاه آزاد اسلامی ، جهرم ، ایران

چکیده

در حال حاضر واکسن زنده توکسوواکس از واریته تخفیف حدت‌یافته‌ی توکسوپلاسما تولید می‌شود. هدف از این پژوهش ارزیابی ایمنی‌زایی واریته‌ی رازی از توکسوپلاسما است که در موسسه رازی شیراز از طریق پاساژهای متوالی و طولانی مدت تولید شده است. بیست و چهار سر موش Balb/c در سه گروه تقسیم شدند. گروه اول کنترل منفی محیط کشت، گروه دوم کنترل مثبت سوش زنده و گروه سوم واریته زنده توکسوپلاسما رازی را دریافت کردند. تمامی موش‌ها به صورت روزانه بررسی و تلفات احتمالی ثبت شد . بیست و هشت روز بعد از تزریق، از تمامی گروه‌های باقی مانده خون‌گیری جهت تست الایزا انجام گرفت و سپس همه گروه‌ها با تزریق سوش حاد چالش شدند. نتایج نشان داد که در گروه کنترل منفی هشت روز پس از چالش تلفات شروع شد و تا روز 14 تمامی موش‌ها در این گروه تلف شدند. در گروه کنترل مثبت مانند گروه اول هشت روز پس از چالش تلفات شروع شد و تا روز 18 تمامی موش‏های این گروه نیز تلف شدند. نتیجه بسیار جالب اینکه در گروه سوم 14 روز پس از چالش تلفات شروع شد و تا یک ماه پس از چالش تنها 50 درصد این گروه تلف شدند. این نتایج نشان داد که واریته توکسوپلاسما رازی منجر به ایجاد ایمنی نسبی در موش گردیده و باعث ایجاد تلفات و بروز بیماری نشد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Razi attenuated variety of Toxoplasma gondii in Balb/c mice

نویسندگان [English]

  • Arezu Abbasifar 1
  • Mehdi Namavari 2
  • Abbasali Rezayian 3
1 Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom, Iran.
2 Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.
3 Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom, Iran.
چکیده [English]

Currently, the live vaccine Toxovax is produced from the attenuated variety of Toxoplasma (T.) gondii. The aim of this study was to evaluate the immunogenicity of live variety of T. gondii which was produced through serial passages in cell culture in Shiraz, Razi Institute. Twenty-four Balb/C mice were randomly divided into three groups. Group I was the negative control and received cell culture media. Group II as positive control and group III were inoculated with acute and Razi strains of T. gondii, respectively. All mice were assessed daily and potential mortality was recorded. Twenty-eight days later blood sample were collected from all groups for ELISA and then all mice were challenged with injections of acute strain of T. gondii. The results showed that in the control group, mortality started from day 8 and up to14 days after challenge, all mice of this group died. Similar to the first group, mortality was started in the positive control group 8 days after challenge and all mice died until the day 18. The interesting finding was that the mortality rate was 50% in the third group. These results suggest that the Razi variety of T. gondii caused partial immunity in mice and this variety doesn’t cause disease and mortality in mice.

کلیدواژه‌ها [English]

  • Toxoplasma gondii
  • BALB/c
  • Mice
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