β-tubulin isotype 1 and 2 was differentially expressed at selected life stages.
Isotype 1 was expressed at all life stages.
Isotype 2 expression was strong in eggs and very weak in L2/3 and adult worms.
Each isotype has specific functions during embryogenesis.
Exposure to TBZ for five days altered β-tubulin gene expression of isotype 1.