A client issues a first electronic request to access a service at a server. Cryptosporidium species antigen and DNAs and RNA encoding the Cryptosporidium antigen and fragments thereof and recombinant proteins or fusion proteins produced thereby. Said at least one pipe is made of a flexible material and each guide plate has at least one through opening for receiving and guiding said at least one pipe in a position in which the longitudinal axis of the pipe extends substantially perpendicular to the plane of each guide plate. The latching member is capable of deforming elastically along a radial direction, and the fastening member is tightly sleeved on the latching portion of the latching member.