Rapid simultaneous detection and quantitation of infectious pancreatic necrosis virus (IPNV).
Infectious pancreatic necrosis virus (IPNV) is a pathogen of great concern in the salmon industry as well as in the environment. Taking advantage of the early immunofluorescent visualization of viral proteins in infected cells, a titration method was developed. At 16 h p.i., fluorescent foci were visualized with a monoclonal antibody against VP3-structural protein of the virus. The counting of each fluorescent cell allows the quantitation of infection foci; titres expressed in fluorescent foci/ml were equivalent to plaque forming units (PFU)/ml. With slight modifications, the same method used to detect the virus in field samples, can be applied to estimate virus contents. Some of the samples used during the assays were obtained from routine screening procedures. The titres recorded from positive samples correlated well with the clinical condition of the fish. With this method, rapid diagnosis and quantitation may simultaneously be performed with the same tissue extract.
Espinoza
Juan Carlos
JC
Laboratorio de Bioquímica y Virología, Instituto de Ciencias Biológicas y Qui;micas, Facultad de Ciencias, Casilla 50 30, Universidad de Valparaiíso, Valparaíso, Chile.
Kuznar
Juan
J
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D018175:Birnaviridae Infections / Q000662:veterinary* / Q000821:virology; D002478:Cells, Cultured; D005393:Fish Diseases / Q000821:virology*; D005455:Fluorescent Antibody Technique; D018061:Infectious pancreatic necrosis virus / Q000302:isolation & purification*; D012474:Salmon / Q000821:virology*; D013997:Time Factors; D010948:Viral Plaque Assay; D015678:Viral Structural Proteins / Q000276:immunology
D000911:Antibodies, Monoclonal; D015678:Viral Structural Proteins