Juan Sanhueza

University of Minnesota - United States Author

Juan studied Veterinary Medicine/Science at the University of Chile, graduating in 2004. During that year, Juan started to work for the Agriculture and Livestock Service (SAG), where he evaluated veterinary medicines for their sale in Chile.

In 2009, Juan started an MSc degree in Veterinary Studies (MVS), veterinary epidemiology, at the University of Massey (New Zealand). During this period, Juan carried out research regarding the role of infectious pathogens on beef cattle fertility, specifically in bulls positive to Campylobacter fetus subsp. venerealis and its link with abortions and seropositivity to BVDv, Neospora caninum, Leptospira borgpetersenii seovar hardjo and Leptospira interrogans serovar pomona.

In 2012, Juan started a Ph.D. on occupational leptospirosis in New Zealand (University of Massey, New Zealand). During this period, he researched the prevalence of antibodies against Leptospira in veterinarians and farmers, risk factors related to the serological status, and the relationship between serology and symptoms similar to influenza in these occupational groups. He also provided an estimation of the efficacy of the vaccination against Leptospira in cattle and the cost of human leptospirosis in terms of disability-adjusted life years lost (DALYs) and their economic value.

During 2016 he worked as research assistant in the Veterinary Epidemiology Centre (EpiCentre), at the University of Massey; and then he joined the University of Minnesota in 2017 as post-doc in the Department of Population Medicine, where he works in the Swine Health Monitoring Project, in which pig producing companies, that represent some 50% of the pig population in the USA, share voluntarily data on the incidence of PRRS and PED.

Updated CV 17-Oct-2017

Juan Sanhueza

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Figure 1: PRRS time-to-stability observed according to the season when the outbreak occurred. Dashed line represents the overall mean value (43.9 weeks). Each box represents 50% of the data (percentiles 25-75) and the black line within the box represents the median (percentile 50), so half of the outbreaks had a TTS above this line and the other half below this line for each season.

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PRRS time-to-stability variability in Midwestern US sow herds

Do outbreaks in the same farm have a similar time-to-stability? What factors can affect time-to-stability?

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Figure 1. Number of weekly cases (green dots) and exponentially weighted moving average (EWMA)(blue line) of the proportion of farms at risk participating in the MSHMP from 2009 to 2018. The epidemic threshold (red line) is calculated every two years and corresponds to the upper confidence interval of the percentage of outbreaks happening in the low risk season (Summer). The dates in the black boxes indicate when the EWMA curve crosses the epidemic threshold.

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Porcine Reproductive and Respiratory Syndrome break recurrence

71% of the farms reporting a PRRS break today will report a break within the following two years. What makes them more susceptible?

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Collection of tails and testicles in a Ziplock bag

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Use of processing fluids for PRRSV diagnostics

We propose to use the processing fluids, the liquid accumulated at the bottom of the pail when farmers collect tails and testicles during routine procedures as a sample.

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09-Nov-2020ytran876is there any difference between castration fluid and tail docking fluid? can they use interchangeably or they have to go together for testing?

Juan Sanhueza

PRRS time-to-stability variability in Midwestern US sow herds

Porcine Reproductive and Respiratory Syndrome break recurrence

Use of processing fluids for PRRSV diagnostics

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