DEVELOPMENT AND DISTRIBUTION OF TRICHINELLA SPIRALIS IARVAE IN MICE INFECTED BY DIFFERENT NUMBERS OF TRICHINELLA SPIRALIS IARVAE

Objective To observe the difference in development,distribution and density of T.spiralis larvae in mice infected by different numbers of these larvae.Method: We devided the mise into three grorps at vandom and infected them with different numbers of T.spiralis larvae.Twenty eight days and thirty five days later,the mice were anatomized respectively and the development,distribution and density of the larvae in the mouse bodies were observed.Results: The development of larvae were about the same in the three groups.The muscles harbouring the highest number of larvae were masseter and diaphragm muscle.However,the distribution and density of the Larvae were significantly different.Conclusion: The results indicate that while infecting with a small numbers of larvae is fit for keeping stips and a larger dose is suitable for collecting T.spiralis larvae and conducting related tests and studies.