Active surveillance for Aujeszky's disease and biosecurity aspects of swine farms in Espírito Santo State, Brazil / Vigilância ativa para Doença de Aujeszky e aspectos sobre a biosseguridade de granjas suínas no Estado do Espírito Santo, Brasil

Aujeszky's Disease (AD) is a highly infectious swine disease caused by Suid herpesvirus 1 (SuHV 1). The present study evaluated the biosafety of commercial swine farms and carried out the first serological survey for Aujeszky's Disease in Espírito Santo State, Brazil. A total of 55 farms in 27 municipalities of the state were selected, where 416 swine serum samples were collected to be submitted to serological diagnosis for AD. Finally, a survey was carried out using a questionnaire to obtain information on the biosecurity of the farms. The results by the ELISA technique indicated the absence of antibodies for AD. Regarding the biosecurity of the farms, 56.4% of the farms did not meet the requirement of internal isolation, 67.3% did not have changing rooms, 72.7% did not provide specific clothing for employees and visitors, 85.5% did not require visitors bathe to access the sheds and only 10.9% of the farms controlled the flow of visitors and vehicles accessing the property. Another noteworthy factor is that only 25.5% of the farms had an area to quarantine replacement animals and 69.1% had an access ramp located close to the animal pens. With the results, it was concluded that there is a need to improve biosecurity measures on commercial farms in the state of Espírito Santo and that there was no presence of Aujeszky's Disease in the evaluated animals.

A Doença de Aujeszky (DA) é uma enfermidade de suínos altamente infecciosa, causada pelo herpesvírus suíno 1 (SuHV 1). O presente estudo objetivou avaliar a biosseguridade das granjas comerciais capixabas de suínos e realizar o primeiro inquérito sorológico para Doença de Aujeszky no Estado do Espírito Santo, Brasil. Foram selecionadas 55 granjas em 27 municípios do Estado, onde se coletou 416 amostras de soro de suínos para serem submetidos ao diagnóstico sorológico para DA. Por fim, foi realizado inquérito, mediante questionário para obter informações sobre a biosseguridade das granjas. Os resultados pela técnica de ELISA indicaram ausência de anticorpos para DA. Em relação à biosseguridade das granjas, 56,4% das granjas não atenderam o requisito de cerca de isolamento interno, 67,3% não possuíam vestiários, 72,7% não disponibilizavam roupas específicas para funcionários e visitantes, 85,5% não exigiam a prática de banho dos visitantes para acesso aos galpões e somente 10,9% das granjas faziam o controle do fluxo de visitantes e veículos que acessam a propriedade. Outro fator destacado é que apenas 25,5% das granjas apresentavam área para realizar quarentena dos animais de reposição e 69,1% possuíam o embarcador localizado próximo às baias dos animais. Com os resultados, concluiu-se que há necessidade de melhoria das medidas de biosseguridade nas granjas comerciais no Estado do Espírito Santo e que não houve presença da Doença de Aujeszky nos animais avaliados.

Toxoplasma gondii infection in pig intended for human consumption: seroprevalence, risk factors and influence of biosecurity measures.

A serologic and epidemiologic study was carried out in order to determinate herd and animal seroprevalence and associated factors for Toxoplasma gondii in commercial pigs from Espírito Santo state, Brazil. Blood samples were collected from 416 pigs from 55 producer farms in 27 municipalities. An indirect immunofluorescent assay (IFA) was performed to estimate the seroprevalence of T. gondii and identify the associated risk factors using a questionnaire. The T. gondii antibody prevalence rate in commercial swine herds was 15.4% (64/416) using a cutoff of 1:64. The seropositivity for T. gondii was related to the presence of cats, water origin and age of swine in the increase of seroprevalence, and the existence of internal isolation fences and use of composting chambers as protective factors. To the best of our knowledge, this is the first study to report anti- T. gondii antibodies in the serum of pigs in the state of Espírito Santo, Brazil. This finding is important to public health because seropositive pigs can harbor tissue cysts in their meat, thereby representing a zoonotic risk for consumers of raw or undercooked porcine meat or its products.

Examination of Horizontal Transmission of Nippostrongylus brasiliensis in Mice to Assess Biosecurity Risks.

Mice are commonly infected with Nippostrongylus brasiliensis (Nb) to study their immune responses. However, biosecurity measures have not been established for housing Nb-infected mice and rats. Transmission reportedly does not occur when infected mice are cohoused with naive mice. To test this, we inoculated female NOD. Cg-Prkdcscid Il2rgtm1Wjl /Sz(NSG;n = 12) and C57BL/6J (B6;n = 12) mice with 750 Nb L3 larvae. These mice were then cohoused with naïve NSG ( n = 24) and B6 ( n = 24) mice (1 infected and 2 naïve mice per cage (24 cages) for 28 d in static microisolation cages that were changed every 14 d. We also did several studies to determine the conditions that favor horizontal transmission. First, we assessed in vitro development to the L3 stage of Nb egg-containing fecal pellets maintained under 4 environmental conditions (dry, moist, soiled bedding, and control). Second, we assessed infection of naïve NSG mice ( n = 9) housed in microisolation cages that contained soiled bedding spiked with infective L3 larvae (10,000/cage). Third, we gavaged NSG mice ( n = 3) with Nb eggs to model the potential for infection after coprophagy. We found that naïve NSG (9 of 24) and B6 (10 of 24) mice cohoused with an infected cagemate passed Nb eggs in feces as early as 1 d after cohousing and intermittently thereafter for varying periods. This shedding was presumably the result of coprophagy because adult worms were not detected in the shedding mice at euthanasia. Although eggs developed in vitro into L3 larvae under moist and control environmental conditions, none of the NSG mice housed in cages with L3 -spiked bedding or gavaged with eggs became infected with Nb. These findings indicate that infectious horizontal transmission does not occur when mice are housed with Nb-shedding cage mates in static microisolation cages with a 14-d cage-changing interval. Results from this study can be used to inform biosecurity practices when working with Nb-infected mice.

The Impact of Biosecurity on Biological and Psychosocial Risks for Health Workers of COVID Hospitals in Guadalajara, Jalisco, Mexico.

BACKGROUND: Some data support that health care workers (HCWs) must have sufficient and good quality personal protective equipment (PPE) and the necessary training to manage COVID patients to avoid contagion that can lead to death. The objective of this study was to determine the relationship between biosafety on the biological risks of SARS-CoV-2 and risks of fatigue, anxiety, or depression in health workers who care for patients in COVID hospitals, from September 2020 to August 2021. MATERIAL AND METHODS: The questionnaire used in this study (Q6S64I) consisted of 6 spheres: Sociodemographic aspects, working conditions; Personal Protection Equipment; safety and health; training and knowledge about COVID-19, the form of transport, and personal health conditions. The answers were online. The Goldberg questionnaire (EADG) measures anxiety and depression, and the questionnaire measures fatigue (Barrientos-Gutiérrez et al.) (PSSF). RESULTS: In total, 76.5% of the HCWs were doctors, 25.2% worked in the emergency services, 79.3% received PPE from their institution, 82.9% cared for COVID-19 patients, and 27.9% tested positive for COVID-19. The PPE provided by the employer was 80%, but the quality was deficient, insufficient, and associated with a relative risk of 4.6. A total of 99% acquired better PPE on their own. The exposure to COVID-19 and the surgical mask provided by the institution had an associated relative risk of 2.8 for the HCWs. A total of 39% of the HCWs reported being calm. CONCLUSIONS: PPE, risk exposure, and safety at work were significantly associated with drowsiness and heaviness, difficulty concentrating, anxiety, and depression.

Biosseguridade na avicultura de corte: impactos na produção e alternativas para prevenção de doenças / Biosecurity in beef poultry: impacts on production and alternatives for disease prevention / Bioseguridad en avicultura: impactos en la producción y alternativas para la prevención de enfermedades

A avicultura de corte levou ao Brasil a ser o no líder exportador de carne de frango, desde 2011, e o terceiro produtor global desta proteína. Portanto, é importante que todo produtor possua e mantenha um programa de biosseguridade continuado, respeitando rigorosamente cada etapa ou prática de manejo a fim de obter o sucesso econômico de sua produção. Sustentado pela medicina veterinária preventiva, um programa de biosseguridade deve apresentar aspectos direcionados a cada sistema de proteção em particular, para prevenir e controlar a presença e/ou introdução de microrganismos patogênicos nos rebanhos. O objetivo deste trabalho e apresentar uma revisão atualizada de literatura sobre programas de biosseguridade para evitar a proliferação de agentes patogênicos na avicultura de corte como os dois tipos de Salmonella que causam riscos à saúde pública e à dos animais. A pesquisa é qualitativa de cunho exploratório bibliográfico-documental, com pesquisa em sites como o Google Acadêmico, da revista de veterinária da Unipar, SCIELO, portal CAPES e sites governamentais. O resultado da pesquisa apresentou um panorama real sobre emprego de programas de biosseguridade no Brasil, direcionados à avicultura de corte, demonstrando que os produtores estão se conscientizando sobre a importância destes programas, devido à pressão do mercado exportador global. Conclui-se que ainda falta uma maior conscientização por parte de todos os produtores brasileiros, para evitar que o plantel produzido seja contaminado por agentes patogênicos, principalmente a Salmonella, evitando que a saúde pública e animal esteja comprometida. Somente desta maneira, o Brasil conseguirá manter e expandir mais o mercado avícola a nível global.(AU)

Poultry farming has led Brazil to be the leading exporter of chicken meat, since 2011, and the third global producer of this protein. Therefore, it is important that every producer has and maintains a continuous biosecurity program, strictly respecting each stage or management practice in order to obtain the economic success of their production. Supported by preventive veterinary medicine, a biosecurity program must present aspects directed to each protection system in particular, to prevent and control the presence and/or introduction of pathogenic microorganisms in herds. The objective of this work is to present an updated review of the literature on biosecurity programs to prevent the proliferation of pathogenic agents in poultry farming, such as the two types of Salmonella that pose risks to public and animal health. The research is qualitative, bibliographical-documentary exploratory, with research on sites such as Google Scholar, Unipar's veterinary magazine, SCIELO, CAPES portal and government sites. The result of the research presented a real panorama on the use of biosecurity programs in Brazil, directed to poultry production, demonstrating that producers are becoming aware of the importance of these programs, due to the pressure of the global export market. It is concluded that there is still a lack of greater awareness on the part of all Brazilian producers, to prevent the produced herd from being contaminated by pathogenic agents, mainly Salmonella, preventing public and animal health from being compromised. Only in this way will Brazil be able to maintain and further expand the poultry market at a global level.(AU)

La avicultura llevó a Brasil a ser el principal exportador de carne de pollo, desde 2011, y el tercer productor mundial de esta proteína. Por ello, es importante que todo productor cuente y mantenga un programa de bioseguridad continuo, respetando estrictamente cada etapa o práctica de manejo para obtener el éxito económico de su producción. Apoyado en la medicina veterinaria preventiva, un programa de bioseguridad debe presentar aspectos dirigidos a cada sistema de protección en particular, para prevenir y controlar la presencia y/o introducción de microorganismos patógenos en los rebaños. El objetivo de este trabajo es presentar una revisión actualizada de la literatura sobre programas de bioseguridad para prevenir la proliferación de agentes patógenos en la avicultura, como los dos tipos de Salmonella que presentan riesgos para la salud pública y animal. La investigación es cualitativa, bibliográfico-documental exploratoria, con pesquisa en sitios como Google Scholar, revista veterinaria de la Unipar, SCIELO, portal de la CAPES y sitios gubernamentales. El resultado de la investigación presentó un panorama real sobre el uso de programas de bioseguridad en Brasil, dirigidos a la producción avícola, demostrando que los productores están tomando conciencia de la importancia de estos programas, debido a la presión del mercado mundial de exportación. Se concluye que aún falta una mayor conciencia por parte de todos los productores brasileños, para evitar que el hato producido sea contaminado por agentes patógenos, principalmente Salmonella, evitando que se comprometa la salud pública y animal. Solo así Brasil podrá mantener y expandir aún más el mercado avícola a nivel mundial.(AU)

Biosecurity in the workplace and a QMS during the COVID-19 pandemic: a survey for Peruvian goods companies.

Objectives. This study analyzes the differences between goods companies with a Standard No. ISO 9001:2015 quality management system (QMS) and those without, in terms of implementation of biosecurity measures during the COVID-19 pandemic. The study shows whether having a QMS helped companies to implement the biosecurity measures required to continue operating during a pandemic. Methods. The sample was composed of 145 Peruvian goods companies. The empirical data were collected through a questionnaire sent to company presidents, general managers and department heads. The questionnaire focused on four biosecurity dimensions in the workplace: protocols, preventive actions, biosecurity processes and risk management. Results. The study found that companies with a QMS (Standard No. ISO 9001:2015) significantly differed from companies without in the implementation of three of the four biosecurity dimensions. Conclusions. This study is useful for academia and companies because it identifies the main differences between certified and non-certified companies, in terms of adoption of biosecurity measures. This study highlights the importance of a QMS to respond to hazardous situations like a global health crisis, but also provides useful information for the strategic decision-making process of companies.

Feed or feed transport as a potential route for a porcine epidemic diarrhoea outbreak in a 10,000-sow breeding herd in Mexico.

Porcine epidemic diarrhoea virus (PEDV) infects pigs of all ages causing vomiting and diarrhoea. PEDV is transmitted via the oral-faecal route, and a very low dose is enough to infect susceptible pigs, resulting in significant production losses. This short communication aims to describe the introduction of PEDV into a 10,000-sow farrow-to-wean farm located in northwest Mexico. Following the onset of clinical signs, an outbreak investigation was conducted to determine the most probable route of introduction. Based on data collected from interviews, construction of a timeline of events, and the detection of PEDV RNA in feed samples and samples collected from various surfaces of feed transport vehicles, it was concluded that the most probable route for PEDV incursion into this breeding herd was contaminated feed or a contaminated feed transport vehicle. This paper describes how feed or feed transport could serve as potential routes of PEDV infection to a farm and highlights the importance of establishing biosecurity programs to mitigate these risks.

In ovo application of a live infectious bursal disease vaccine to commercial broilers confers proper immunity.

Infectious bursal disease (IBD) is an economically important disease of young chickens caused by the Avibirnavirus infectious bursal disease virus (IBDV). Besides biosecurity, vaccination is the most important measure for IBDV control. Sufficient levels of maternally derived antibodies (MDA) protect against early challenge and also interfere with the take of live conventional vaccines. Recently, the field surveys conducted in four countries, published by Ashash, U., Noach, C., Perelman, B., Costello, C., Sansalone, P., Brazil, T. & Raviv, Z. [(2019). In ovo and day of hatch application of a live infectious bursal disease virus vaccine to commercial broilers. Avian Diseases, 63, 713-720] using the MB-1 vaccine strain by in ovo application or sub-cutaneous route at the day of hatch seem to conflict with the rule that very early application of a conventional live vaccine in birds with significant levels of MDA has very little chance of a successful immune response. An in ovo vaccination-challenge controlled experiment with MB-1 vaccine was performed using commercial broilers with high levels of MDA against IBDV and a vvIBDV challenge at 22 or 36 days of age. Clinical signs, bursa-bodyweight ratios, histology, serology, RT-PCR, Sanger- and deep sequencing were used to study the efficacy and safety of the in ovo-applied MB1 vaccine in comparison to an established immuno-complex vaccine. The study findings confirmed that the in ovo application of the live MB-1 vaccine in commercial broilers was successful and induced full protection against a vvIBDV challenge at 22 and 36 days of age, demonstrated by the bursa lesion score and qPCR and IBDV genotyping. Comparable to the field studies, a delayed viral replication of 2-3 weeks, following the in ovo administration of the MB1 vaccine, was observed.

Garanticemos la calidad de las muestras respiratorias para diagnosticar COVID-19 / Let's guarantee the quality of respiratory samples to diagnose COVID-19

Resumen Este artículo y video disponibles en el OJS de la Revista describe los procedimientos para la recolección de hisopos respiratorios que garantizan la bioseguridad y el diagnóstico de COVID-19 en adultos y niños.

Abstract This article and video describes the procedures for the collection of respiratory swabs that guarantee biosecurity and the diagnosis of COVID-19 in adults and children.

Medidas implementadas en escuelas para prevenir el contagio por SARS-CoV-2 en el contexto de pandemia por coronavirus 2019: servicio de respuesta rápida / Measures implemented in schools to prevent SARS-CoV-2 transmission in the context of the 2019 coronavirus pandemic: rapid response service

ANTECEDENTES Y OBJETIVO El Departamento de Epidemiología/División de Planificación Sanitaria solicita este resumen, con el objetivo de entregar evidencia científica respecto a medidas implementadas en escuelas para prevenir el contagio por SARS-CoV-2 en niños METODOLOGÍA Se realizó una búsqueda de evidencia en el Living Evidence Map COVID-19 creado por el Departamento ETESA/SBE y complementado con una búsqueda en Pubmed y literatura gris. RESULTADOS Se recuperaron 14 estudios -UNICEF, OMS y la Federación Internacional de Cruz Roja publicaron una guía provisional sobre directrices para la prevención y control de la COVID-19 en las escuelas. -CDC de China publicó 2 guías, una señala los requisitos de gestión de las escuelas y la otra entrega pautas provisionales para la prevención entre estudiantes. -Instituto Noruego de Salud Pública y CDC Europeo presentan una propuesta de cohorte de niños en la que se establecen grupos pequeños y fijos. -Estado de Nueva Gales del Sur de Australia aplica las directrices de no aplicar pautas estrictas de distanciamiento físico para niños, mantener el lavado de manos, evitar compartir bebidas y alimentos. -Pensilvania de EEUU establece directrices sobre la reapertura de recintos escolares, orientaciones para los deportes escolares, campamentos de verano y salud mental. -Departamento de educación de Reino Unido publicó una "Guía de acciones para escuelas durante el brote de coronavirus". -Center for Disease Control and Prevention (CDC) Establece que mientras más personas interactúen con un estudiante mayor será el riesgo de propagación de COVID-19. -Algunas medidas de centros educacionales de Suiza, Dinamarca, Países Bajos, Canadá, Australia, Francia, Chipre y China fueron el distanciamiento social, clases al aire libre, escritorios separados por 2 metros, protectores de plástico alrededor de los escritorios, dispensadores de alcohol gel en las entradas, asistencia una vez a la semana de forma escalonada, control de temperatura, líneas rojas para evitar que niños de diferentes grupos entren en contacto, lavado de manos cada hora, grupos pequeños en clases, clases escalonadas para tener dos grupos de alumnos, grupos de juego de no más de 4 niños, instalación de lavamanos en los patios de juego, desinfección de artículos escolares, garantizar un buen dormir, entre otras medidas.