Machine-learning algorithms to identify key biosecurity practices and factors associated with breeding herds reporting PRRS outbreak

The objective of this study was to evaluate the use of machine-learning (ML) algorithms to identify key biosecurity practices and factors associated with breeding herds self-reporting (yes or no) a PRRS outbreak in the past 5 years. In addition, we explored the use of the positive predictive value (PPV) of these models as an indicator of risk for PRRSv introduction by comparing PPV and the frequency of PRRS outbreaks reported by the herds in the last 5 years. Data from a case control study that assessed biosecurity practices and factors using a survey in 84 breeding herds in U.S. from 14 production systems were used. Two methods were developed, method A identified 20 variables and accurately classified farms that had reported a PRRS outbreak in the previous 5 years 76% of the time. Method B identified six variables which 5 of these had already been selected by model A, although model B outperformed the former model with an accuracy of 80%. Selected variables were related to the frequency of risk events in the farm, swine density around the farm, farm characteristics, and operational connections to other farms. The PPVs for methods A and B were highly correlated to the frequency of PRRSv outbreaks reported by the farms in the last 5 years (Pearson r = 0.71 and 0.77, respectively). Our proposed methodology has the potential to facilitate producer’s and veterinarian’s decisions while enhancing biosecurity, benchmarking key biosecurity practices and fact...
Source: Preventive Veterinary Medicine - Category: Veterinary Research Source Type: research

Related Links:

ConclusionThe interactive web application was both usable and useful for infection control practitioners. Its implementation in routine practice could help professionals to identify potential outbreaks while creating data to train automated detection algorithms.
Source: Journal of Hospital Infection - Category: Infectious Diseases Source Type: research
Conclusions: Despite public health efforts, a small number of healthcare workers were inadequately protected, and antibody titers were lower than required to maintain herd immunity. For effective prevention of nosocomial infection, VZV IgG status should be documented for all HCWs, and susceptible HCWs should be vaccinated to avoid outbreaks. Pre-employment screening and vaccination have increased immunity and need to be conducted to ensure protection of vulnerable patients.
Source: International Journal of Environmental Research and Public Health - Category: Environmental Health Authors: Tags: Article Source Type: research
Authors: Kang SH, Kim MY, Baik SK Abstract Until 1995, the incidence of symptomatic acute hepatitis A was minimal and there were no cases of national outbreak in Korea. However, there was a nationwide outbreak of hepatitis A that peaked in 2009. In 2019, a total of 10,083 cases of acute hepatitis A were reported for seven months of the year according to the Korea Center for Disease Control and Prevention. This may be attributed to the proportion of susceptible subjects in the Korean population, as about 10 years have passed since herd immunity was induced by the epidemic occurring during the late 2000s. Recent stud...
Source: Journal of Korean Medical Science - Category: Biomedical Science Tags: J Korean Med Sci Source Type: research
Publication date: Available online 20 September 2019Source: Veterinary MicrobiologyAuthor(s): Alessandra Longo, Carmen Losasso, Federica Vitulano, Eleonora Mastrorilli, Sara Turchetto, Sara Petrin, Claudio Mantovani, Maria Cristina Dalla Pozza, Elena Ramon, Gabriella Conedera, Carlo V. Citterio, Antonia Ricci, Lisa Barco, Antonia Anna LettiniAbstractAn unusual mortality of wild boars occurred in Italy from 2012 to 2015 due to Salmonella Choleraesuis infection.In order to confirm the occurrence of an outbreak of S. Choleraesuis in wild boars and to epidemically characterise the unique S. Choleraesuis biovar, a collection of...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
Health authorities in Democratic Republic of Congo said on Saturday that they plan to introduce a second Ebola vaccine, manufactured by Johnson&Johnson, to counter the second-worst outbreak of the virus in history.
Source: Reuters: Health - Category: Consumer Health News Tags: healthNews Source Type: news
Authors: Fukushima K, Yanagisawa N, Sekiya N, Izumiya H Abstract Non-typhoidal Salmonella (NTS) infection is a major pathogen causing gastroenteritis among immunocompetent adults. NTS infection is mainly transmitted by contaminated food and water, but some cases are transmitted by animal contact. Salmonella enterica subsp. enterica serovar Poona (S. Poona) is an NTS usually transmitted by reptiles, and cases including outbreaks of gastroenteritis have been reported previously. However, invasive infections due to this organism among immunocompetent adults are rare. We herein report a case of a 39-year-old man who wa...
Source: Internal Medicine - Category: Internal Medicine Tags: Intern Med Source Type: research
her For the first 60 years following its isolation, Zika virus (ZIKV) remained a relatively poorly described member of the Flaviviridae family. However, since 2007, it has caused a series of increasingly severe outbreaks and is now associated with neurological symptoms such as Guillain-Barré syndrome and congenital Zika syndrome (CZS). A number of reports have improved our understanding of rare complications that may be associated with ZIKV infection in adults, the areas of the body to which it spreads, and viral persistence in various tissues. Likewise, studies on the effect of ZIKV infection during pregnan...
Source: Viruses - Category: Virology Authors: Tags: Review Source Type: research
GIDEON what’s new summary: September 19 to September 20, 2019 Infectious Diseases – Outbreaks (27 updates) 27 DiseasesMap Infectious Diseases – Diseases (113 updates) 3 Clinical notes37 Diseases73 Country notesMap Infectious Diseases – Drugs (1 updates) 1 Drug The post Update: September 20, 2019 appeared first on GIDEON - Global Infectious Diseases and Epidemiology Online Network.
Source: GIDEON blog - Category: Databases & Libraries Authors: Tags: What's New Source Type: blogs
(MANILA, Philippines) — Philippine health officials on Friday confirmed a second case of polio in a 5-year-old child a day after declaring the country’s first outbreak in nearly two decades, and announced plans for a massive immunization program. Health Secretary Francisco Duque III said authorities confirmed the new case in a boy from Laguna province south of Manila after samples were found positive for the polio virus. Health officials declared a new outbreak Thursday after confirming the disease in a 3-year-old girl in southern Lanao del Sur province. They said the polio virus has also been detected in sewag...
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized Infectious Disease onetime Phillipines Source Type: news
Philippine health officials have confirmed a second case of polio in a 5-year-old child a day after declaring the country's first outbreak in nearly two decades and announced plans for a massive immunization program
Source: ABC News: Health - Category: Consumer Health News Tags: Health Source Type: news
More News: Learning | Outbreaks | Respiratory Medicine | Study | Universities & Medical Training | Veterinary Research