title: Effect of Cypermethrin on the Growth of Ciliate Protozoan Paramecium caudatum.
abstract: OBJECTIVE
  The objective of this study is to assess the effect of cypermethrin on the growth of ciliate protozoan Paramecium caudatum.
  
  
  METHODS
  Monoxenic culture of P. caudatum, were exposed to different doses (0.01, 0.05, 0.1, 0.15, and 0.2 µg/L) of cypermethrin along with control for 24, 48, 72, and 96 h time interval. The total numbers of live and dead cells were counted after trypan blue staining in Neubauer hemocytometer.
  
  
  RESULTS
  Marked decrease in the number of living cells with the increase in the concentration of cypermethrin and with increasing exposure time intervals was recorded.
  
  
  CONCLUSIONS
  The results indicate that cypermethrin is toxic to P. caudatum even at low concentrations when it enters in the aquatic system through runoff.
authors: Department of Zoology, School of Biotechnology and Biosciences, Lovely Professional University, Phagwara, Punjab, India.
authors: Joydeep
authors: J
authors: Dutta
keywords: Cypermethrin; Paramecium; population growth