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False positive results with an ELISA for detection of chlamydia antigen.

T. Riordan, D. Ellis, P. Matthews, 1986, Journal of clinical pathology.

Recognition of whole Cryptosporidium oocysts in feces by negative staining and electron microscopy

D. Baxby, N. Blundell, B. Getty, 1984, Journal of clinical microbiology.

Evaluation of a commercial ELISA for detecting Norwalk-like virus antigen in faeces.

M. Jenkins, J. Gray, H. Appleton, 2003, Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology.