Cost-effectiveness of longitudinal surveillance for Piscirickettsia salmonis using qPCR in Atlantic salmon farms (Salmo salar) in Chile

Marina Delphino, Fernando Mardones, Joaquin Neumann, Alicia Gallardo, Daniel Jimenez, Andrea Peña, Marco Rozas-Serri, Ian Gardner

Abstract

Costs of diagnostic testing including sample collection, sampling frequency and sample size are an important consideration in the evaluation of the economic feasibility of alternative surveillance strategies for detection of infectious diseases in aquatic animals. In Chile, Piscirickettsia salmonis is the primary reason for antibiotic treatments in farmed Atlantic salmon. In 2012, a surveillance and control programme for piscirickettsiosis was established with an overall goal of reducing antibiotic use. The present study estimated the cost-effectiveness of different sampling frequencies and sample sizes to achieve at least 95% confidence of early detection of P. salmonis at the netpen and farm levels using a validated qPCR test. We developed a stochas- tic model that incorporated variability in test accuracy, within-pen prevalence and sampling costs. Our findings indicated that the current piscirickettsiosis surveillance programme based on risk-based sampling of five moribund or dead fish from 2 to 3 netpens is cost-effective and gives a high probability of detection of P. salmonis in Atlantic salmon farms in Chile at both the netpen and farm levels. Results from this study should incentivize salmon farmers to establish cost-effective strategies for early detection of P. salmonis infection and the application of this approach to other highly infectious diseases.

Descargar

Últimas Publicaciones

Equipo Pathovet Labs se prepara para AquiShow 2022 en Brasil

Equipo Pathovet Labs se...

¿Es jaque mate? Publican revisión sobre Piscirickettsia salmonis

Chile: En un detallado...

Why Does Piscirickettsia salmonis Break the Immunological Paradigm in Farmed Salmon? Biological Context to Understand the Relative Control of Piscirickettsiosis

Marco Rozas-Serri Abstract Piscirickettsiosis...

Asociación de primer nivel para el control de Caligidosis

Como los mejores deben...

Pathovet Labs autorizado para evaluación de susceptibilidad Caligus a antiparasitarios

🇨🇱🐟 Pathovet Labs obtuvo...

Nuevos anticuerpos para evaluar respuesta inmune en salmones

🇨🇱🐟 #HistoriaDeInnovación Pathovet Labs Complementando...