ABSTRACT
Objetivo: Comprobar si un programa de telemedicina mejora el cumplimiento con CPAP, alcanzando un uso de, al menos, 4 horas al día en el 90% de los pacientes. Realizamos un estudio piloto para comprobar la viabilidad de un proyecto multicéntrico en el que perfeccionaremos dicho programa. Metodología: Pacientes con AOS severa poco sintomáticos en tratamiento con CPAP fueron randomizados a seguimiento habitual o seguimiento habitual más un programa de telemedicina durante 6 meses. Dentro de este programa, las variables de telemonitorización, la aparición de efectos secundarios y la presencia de sueño reparador eran analizadas para generar alarmas e instrucciones al paciente para la autogestión precoz de los problemas presentados con la CPAP. Resultados: 60 pacientes fueron randomizados, 33 al grupo intervención y 27 al grupo control, sin diferencias significativas en las variables basales. El 80% eran hombres con un rango de edad entre los 24 y 75 años. Solo hubo un abandono en el grupo control. Conclusiones: El uso de nuestro programa de telemedicina no ha supuesto ningún problema para los pacientes incluidos a pesar de la horquilla amplia de edad, siendo viable el desarrollo de un estudio a mayor escala con una herramienta de telemedicina perfeccionada. (AU)
Basis: poor compliance with CPAP is a problem at a clinical and research level, assuming the expected results are not achieved. The benefits of using telemedicine in obstructive sleep apnea (OSA) are inconclusive, with its positive effect on compliance being the most consistent in the literature. Objective: to check if a telemedicine program improves compliance with CPAP, reaching use of at least 4 hours a day in 90% of patients. We carried out a pilot study to verify the viability of a multicenter project in which we will perfect this program. Method: patients with severe OSA with few symptoms on CPAP treatment were randomized to usual follow-up or usual follow-up plus a telemedicine program for 6 months. Within this program, the telemonitoring variables, the appearance of side effects and the presence of restorative sleep were analyzed to generate alarms and instructions to the patient for early self-management of the problems presented with CPAP. Preliminary results: 60 patients were randomized, 33 to the intervention group and 27 to the control group, with no significant differences in the baseline variables. 80% were men with an age range between 24 and 75 years. There was only one dropout in the control group. Conclusions: the use of our telemedicine program has not posed any problems for the included patients despite the wide age range, making it feasible to develop a larger-scale study with an improved telemedicine tool. (AU)
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Telemedicine , Sleep Apnea, Obstructive/drug therapy , Medication Adherence , Prospective Studies , Telemonitoring , Continuous Positive Airway PressureABSTRACT
Philornis Meinert 1890 (Diptera: Muscidae) is a genus of flies that parasitize birds in the Neotropical region. The characteristics of the host-parasite interactions and its consequences may depend on the Philornis species involved, and thus precise identification of these parasites is crucial for the interpretation of ecological and epidemiological studies. However, morphological identification of Argentine Philornis species is elusive while molecular evidence points towards the existence of a complex of cryptic species or lineages undergoing a speciation process, which were named the 'Philornis torquans complex'. Herein the authors extended the current knowledge on the systematics and biogeography of parasitic Philornis flies from Argentina, analysing samples collected in several ecoregions, including the Atlantic Forest, Iberá Wetlands, Open Fields and Grasslands, Espinal, Pampa, Dry Chaco, Humid Chaco, Delta and Paraná River Islands, Monte of Plains and Plateaus. The results of the present study strengthen the evidence on previously described Philornis genotypes using four genetic markers (ITS2, COI, ND6, 12S rRNA). The authors report new patterns of occurrence and describe the presence of a novel genotype of subcutaneous Philornis. In addition, the present study unveils ecological niche differences among genotypes of the Philornis torquans complex in southern South America.
Subject(s)
Muscidae , Parasites , Animals , Argentina/epidemiology , Genetic Variation , Larva , Muscidae/geneticsABSTRACT
Non-invasive respiratory support (NIRS) in adult, pediatric, and neonatal patients with acute respiratory failure (ARF) comprises two treatment modalities, non-invasive mechanical ventilation (NIMV) and high-flow nasal cannula (HFNC) therapy. However, experts from different specialties disagree on the benefit of these techniques in different clinical settings. The objective of this consensus was to develop a series of good clinical practice recommendations for the application of non-invasive support in patients with ARF, endorsed by all scientific societies involved in the management of adult and pediatric/neonatal patients with ARF. To this end, the different societies involved were contacted, and they in turn appointed a group of 26 professionals with sufficient experience in the use of these techniques. Three face-to-face meetings were held to agree on recommendations (up to a total of 71) based on a literature review and the latest evidence associated with 3 categories: indications, monitoring and follow-up of NIRS. Finally, the experts from each scientific society involved voted telematically on each of the recommendations. To classify the degree of agreement, an analogue classification system was chosen that was easy and intuitive to use and that clearly stated whether the each NIRS intervention should be applied, could be applied, or should not be applied.
Subject(s)
Noninvasive Ventilation , Respiratory Insufficiency , Adult , Cannula , Child , Consensus , Humans , Infant, Newborn , Oxygen , Pyruvates , Respiratory Insufficiency/therapy , Societies, ScientificABSTRACT
La nueva pandemia producida por un beta-coronavirus, SARS-CoV-2 presenta algunos hechos diferenciales con las pandemias anteriores también producidas por beta-coronavirus (síndrome respiratorio agudo severo - SARS y síndrome respiratorio de Oriente Medio - MERS). El soporte respiratorio consiste en oxigenoterapia convencional, oxigenoterapia nasal de alto flujo, ventilación mecánica no invasiva, CPAP (presión positiva continua en las vías respiratorias) y ventilación mecánica invasiva. Puede ser que este tipo de tratamiento haya salvado más vidas que otros tratamientos utilizados durante la pandemia. Aunque algunos componentes del apoyo no invasivo, como la oxigenoterapia nasal de alto flujo, la ventilación no invasiva y la CPAP, tenían dudas sobre su eficacia al comienzo de la pandemia, se han utilizado ampliamente en todo el mundo. Por otro lado, COVID-19 presenta hallazgos patológicos distintivos que probablemente causan cambios fisiológicos diferentes a la dificultad respiratoria clásica del adulto y, en consecuencia, pueden conducir a diferentes escalas y ajustes del soporte respiratorio. En estas líneas revisaremos la evidencia clínica de la eficacia del soporte respiratorio no invasivo en la insuficiencia respiratoria aguda hipoxémica antes de la pandemia, los cambios patológicos, patogénicos y funcionales descritos en esta neumonía y cómo estos pueden afectar también la aplicación del soporte respiratorio, como la forma en que hoy debemos aplicar el soporte respiratorio (AU)
The new pandemic produced by a beta-coronavirus, SARS-Cov-2 presents some differential facts with the previous pandemics also produced by beta-coronavirus (severe acute respiratory syndrome--SARS and Middle East respiratory syndrome--MERS). The respiratory support consists of conventional oxygen therapy, high-flow nasal oxygen therapy, non-invasive mechanical ventilation, CPAP (continuous positive airway pressure), and invasive mechanical ventilation. May be this type of treatment has saved more lives than other treatments used during the pandemic. Although some components of noninvasive support such as high-flow nasal oxygen therapy, noninvasive ventilation, and CPAP had uncertainties regarding their efficacy at the beginning of the pandemic, they have been used widely throughout the world. On the other hand, COVID-19 presents distinctive pathological findings that probably cause physiological changes different from the classical respiratory distress of the adult and consequently can lead to different scaling and adjustments of respiratory support. In these lines we will review the clinical evidence of the efficacy of non-invasive respiratory support in hypoxemic acute respiratory failure before the pandemic, the pathological, pathogenic and functional changes described in this pneumonia and how these can affect the application of respiratory support as well as the way in which today we must apply respiratory support (AU)
Subject(s)
Humans , Oxygen Inhalation Therapy , Noninvasive Ventilation , Pneumonia, Viral/therapy , /therapyABSTRACT
Non-invasive respiratory support (NIRS) in adult, pediatric, and neonatal patients with acute respiratory failure (ARF) comprises two treatment modalities, non-invasive mechanical ventilation (NIMV) and high-flow nasal cannula (HFNC) therapy. However, experts from different specialties disagree on the benefit of these techniques in different clinical settings. The objective of this consensus was to develop a series of good clinical practice recommendations for the application of non-invasive support in patients with ARF, endorsed by all scientific societies involved in the management of adult and pediatric/neonatal patients with ARF. To this end, the different societies involved were contacted, and they in turn appointed a group of 26 professionals with sufficient experience in the use of these techniques. Three face-to-face meetings were held to agree on recommendations (up to a total of 71) based on a literature review and the latest evidence associated with 3 categories: indications, monitoring and follow-up of NIRS. Finally, the experts from each scientific society involved voted telematically on each of the recommendations. To classify the degree of agreement, an analogue classification system was chosen that was easy and intuitive to use and that clearly stated whether the each NIRS intervention should be applied, could be applied, or should not be applied.
ABSTRACT
Philornis flies are the major cause of myiasis in nestlings of Neotropical birds, being of major concern in geographically-restricted and endangered bird species. Despite its relevance for the conservation of birds, there is little information about the environmental dimensions determining Philornis spp. geographical range. By using maximum entropy, we identified for the first time the macro-environmental variables constraining the abiotic niche of the P. torquans complex in South America, and provided a model map of its potential distribution based on environmental suitability. We identified the minimum temperature of the coldest month as the most relevant variable, associated with the largest decrease in habitat suitability in Brazil and northern South America. Furthermore, the mean temperature of the warmest quarter limited suitability mostly along with the Andean range. In addition, humidity and moisture are influential factors in most of Argentina, northern Chile, and coastal Peru. The geographical projection suggests that environments in most of central-eastern Argentina, and in a broad area in central Chile, are suitable for the presence of the P. torquans complex. Besides providing information about the ecology of Philornis spp., this study represents a tool for bird conservation and a reference for future work on the distribution of this genus.
Subject(s)
Muscidae , Myiasis , Parasites , Animals , Birds , Chile/epidemiology , Myiasis/veterinaryABSTRACT
The tropical fowl mite, Ornithonyssus bursa, is a common avian parasite found on diverse bird species worldwide. In the Neotropical region, O. bursa is present in wild birds, but it may also infect poultry and bite humans. Little is known about the ecology and epidemiology of this parasite. We conducted a thorough longitudinal study in passerine assemblages from central Argentina, gathering data from six reproductive seasons, with the aim of identifying factors that have a role in driving the occurrence and distribution of O. bursa in its natural hosts. We focused on the brood and microhabitat levels, accounting for potential confounders of higher levels. The results hereby presented contribute to our knowledge on the eco-epidemiology of O. bursa in natural hosts of the Neotropical region. Among the many variables assessed, nest material and host species appeared to be the most important correlates of O. bursa prevalence. Nonetheless, supplementary analyses showed that host species is a stronger predictor than nest material. Moreover, mite burden (parasite intensity) was found to depend on host species, but not on nest material. The association with species depended on nestling age, suggesting that resistance builds up as the nestling develop, but at a different pace depending on the bird species. Brood size was inversely correlated with intensity of parasitism, suggesting a dilution of the parasite burden on each nestling.
Subject(s)
Bird Diseases/parasitology , Mite Infestations/veterinary , Mites/physiology , Animals , Animals, Wild/parasitology , Animals, Wild/physiology , Argentina , Bird Diseases/physiopathology , Birds/classification , Birds/parasitology , Host Specificity , Longitudinal Studies , Mites/geneticsABSTRACT
This paper reviews the use of video games for measuring intelligence differences and reports two studies analyzing the relationship between intelligence and performance on a leisure video game. In the first study, the main focus was to design an Intelligence Test using puzzles from the video game. Forty-seven young participants played "Professor Layton and the curious village"® for a maximum of 15 hours and completed a set of intelligence standardized tests. Results show that the time required for completing the game interacts with intelligence differences: the higher the intelligence, the lower the time (d = .91). Furthermore, a set of 41 puzzles showed excellent psychometric properties. The second study, done seven years later, confirmed the previous findings. We finally discuss the pros and cons of video games as tools for measuring cognitive abilities with commercial video games, underscoring that psychologists must develop their own intelligence video games and delineate their key features for the measurement devices of next generation.
Subject(s)
Intelligence/physiology , Neuropsychological Tests , Psychomotor Performance/physiology , Video Games , Adolescent , Adult , Female , Humans , Male , Young AdultABSTRACT
BACKGROUND: In spite of the verifiable achievements obtained in gender equity, one wonders if they still exist in our societies gendered activities (roles) at the household level. This study states an affirmative prediction. Gender role is here organized in four different nuclei: instrumentality inside and outside home for men; expressiveness and instrumentality inside home for women, pertaining to two clearly different domains (household activities for men and household activities for women). METHOD: 98 women and 86 men completed the Gender Roles Questionnaire (GRQ). RESULTS: Obtained results showed that: (a) men and women do not do certain household activities (roles) with the same frequency; (b) the four-dimensional approach fits the data better than the one-dimensional and even better than the two-dimensional approach (household gender roles for men and women separately). CONCLUSION: Discussion focuses on the implications of these results for both research and education.
Subject(s)
Gender Identity , Household Work/organization & administration , Adult , Female , Humans , Male , Self ReportABSTRACT
OBJECTIVE: This study aimed to test the effect of an irrelevant external distracter included in a computer-administered visual search test. Two hypotheses were tested: (a) If the distracter affects performance, attention efficiency will be lowered; (b) if children do not habituate to the distracter, performance will be lower for every item of the test. METHOD: Distraction was induced changing the screen color unexpectedly several times in each trial-450 children (225 girls and 225 boys) from second to sixth course were tested. This group was compared with a group of 423 children from the same age range who were tested with the same test without distraction. RESULTS: Induced distraction reduced attention efficiency for all ages and for every trial in the treatment group (test with distraction). Speed was lower, but number of errors did not increase. CONCLUSION: School-age children cope with an irrelevant external distracter by reducing speed, not accuracy.
Subject(s)
Attention , Reaction Time/physiology , Visual Perception , Child , Female , Humans , Male , Photic Stimulation , Task Performance and AnalysisABSTRACT
The purpose of this study was to analyze the DiViSA's predictive validity in school-age children. To do so, two groups of school-age children were compared: one with low school achievement (N = 1,174), and one with typical development (N = 1,426). The obtained results show that: (1) in all grades, children with poor school performance exhibited lower levels of attention and task organization, greater hastiness, and made more commission errors; (2) the combination of variables that best differentiated between groups was not the same in all grades; (3) level of organization improved with age in the low-school-achievement group, and did not in the typical-development group; (4) the data regarding sensitivity (81% to 93%) and specificity (79% to 90%), for the first time computed for each grade separately, support the test's predictive validity in the grades we evaluated. The discussion focuses on the DiViSA test's usefulness in diagnosing attention problems. It is the first computerized test to include separate scores for: (a) how children complete the task (organization) and (2) the source of their errors (distraction or hastiness).
Subject(s)
Achievement , Attention/physiology , Child Development/physiology , Neuropsychological Tests/standards , Psychometrics/instrumentation , Child , Female , Humans , Male , Predictive Value of Tests , Sensitivity and SpecificityABSTRACT
Toxoplasmosis is commonly asymptomatic; however, it can be a fatal multisystemic disease in some animal species, such as New World monkeys. An outbreak of acute fatal toxoplasmosis was reported in a colony of black-capped squirrel monkeys (Saimiri boliviensis) from the zoo of La Plata, Argentina. Post-mortem examination of two monkeys revealed macroscopical and microscopical lesions compatible with acute toxoplasmosis. The presence of Toxoplasma gondii was confirmed by immunohistochemistry on monkey tissues, bioassay in mice and PCR using the specific primers B22-B23. By PCR-RFLP analysis, T. gondii isolated in mice, deriving from both monkeys, showed the same restriction pattern, with most markers showing a type III restriction pattern, except for C22-8 (type II) and C29-2 (type I). To our knowledge this is the first report of fatal toxoplasmosis in S. boliviensis caused by a non-canonical or atypical genotype of T. gondii.
Subject(s)
Animals, Zoo/parasitology , Monkey Diseases/parasitology , Saimiri/parasitology , Toxoplasma/classification , Toxoplasma/isolation & purification , Toxoplasmosis, Animal/parasitology , Animals , Argentina , DNA, Protozoan/genetics , Disease Outbreaks , Genotype , Male , Mice , Polymerase Chain Reaction , Polymorphism, Restriction Fragment Length , Toxoplasma/geneticsABSTRACT
Ganglioneuromatosis (GNM) is a rare condition characterized by the benign proliferation of ganglion cells, nerve fibres and supporting cells of the enteric nervous system. Necropsy examination of a female piglet weighing 4 kg revealed a well-demarcated 20 cm segment of terminal ileum with thickening of the wall. Microscopically, the lamina propria was infiltrated by enteric glial cells and large ganglion cells. Within the submucosal and muscular layers, aggregates of neurons were interlaced by Schwann cells and enteric glial cells arranged in concentric rings. Immunohistochemically, the neurons were weakly labelled for S-100 and neuron-specific enolase, Schwann cells expressed S-100 and vimentin and enteric glial cells expressed glial fibrillary acidic protein and S-100. Pathological and immunohistochemical findings supported the diagnosis of ileal GNM.
Subject(s)
Ganglioneuroma/veterinary , Ileal Neoplasms/veterinary , Swine Diseases/pathology , Animals , Female , Ganglioneuroma/pathology , Ileal Neoplasms/pathology , Immunohistochemistry , Sus scrofa , SwineABSTRACT
Cadmium (Cd) is a well-known toxicant targeting many organs, among them placenta. This heavy metal also has embryonary and foetal toxicity. This study was undertaken to analyse the effect of a single Cd dose administered at 4, 7, 10 or 15 days of gestation on the offspring of pregnant rats sacrificed at 20 days of gestation. Cadmium chloride was administered subcutaneously at 10 mg/kg body weight to Wistar pregnant dams; control animals received a proportionate volume of sterile normal saline by the same route. Maternal uteri, livers, kidneys and lungs, and foetuses were examined at necropsy. Samples of maternal organs and whole foetuses were collected for histopathologic examination, determination of Cd levels and staining by the Alizarin red S technique. Results revealed a clear embryotoxic and a teratogenic effect of this heavy metal, the former as a significant increase in the number of resorptions, and the latter as significant decrease of the gestational sac weight, and the size and weight of foetuses of Cd-treated dams as well as induced malformations in skull bones, vertebrae and thoracic, and pelvian limbs. The deleterious effects found were similar to those previously reported for other animal models suggesting a high conservation of the pathogenic mechanisms of Cd. Additionally, many of the addressed aspects showed a slight dependence on the time of administration of the toxic that might be due to the accumulation of the metal in different organs, as we were able to demonstrate by the analysis of its concentration.
Subject(s)
Cadmium Chloride/toxicity , Environmental Pollutants/toxicity , Fetus/abnormalities , Prenatal Exposure Delayed Effects , Animals , Cadmium Chloride/administration & dosage , Environmental Pollutants/administration & dosage , Female , Fetus/drug effects , Pregnancy , Rats , Rats, WistarABSTRACT
OBJECTIVE: The aim of this study was to analyze autonomic function and cardiac sympathetic innervation in symptomatic and asymptomatic carriers of the E46K alpha-synuclein gene (SNCA) mutation. PATIENTS AND METHODS: Autonomic function tests were performed in six patients, four of whom were symptomatic carriers (ages: 46, 59, 52 and 28-years) and two who were asymptomatic carriers (ages: 52 and 29 years). Autopsy studies were performed on an additional two symptomatic carriers not eligible for autonomic testing. Patients completed the SCOPA autonomic questionnaire, and underwent the head-up tilt test accompanied by measurements of plasma norepinephrine. Valsalva maneuver and deep breathing tests, along with recording of sympathetic skin response (SSR) and cardiac MIBG scintigraphy were carried out. Myocardial tissue sections removed from the two autopsied cases were subjected to routine histological staining and immunohistochemical processing with monoclonal antibodies against tyrosine hydroxylase and alpha-synuclein. RESULTS: Both the four symptomatic and the older asymptomatic carriers reported abnormalities in the SCOPA questionnaire and had markedly diminished cardiac MIBG uptake. Plasma norepinephrine in the supine and tilted positions was normal in all subjects. Only one patient had significant orthostatic hypotension. There was a complete absence of tyrosine hydroxylase immunostaining in the myocardium of the two autopsied cases. INTERPRETATION: We have found imaging and histological evidence of cardiac sympathetic denervation in symptomatic and asymptomatic carriers of the E46K alpha-synuclein gene mutation. The sympathetic denervation appears to be organ-specific, with selective affectation of the heart given that plasma norepinephrine levels and blood pressure were normal.
Subject(s)
Mutation/genetics , Parkinson Disease/genetics , Sympathectomy , Sympathetic Nervous System/physiopathology , alpha-Synuclein/genetics , Adult , Blood Pressure/genetics , Female , Heart/innervation , Humans , Male , Middle Aged , Norepinephrine/blood , Parkinson Disease/complications , Parkinson Disease/physiopathology , Sympathectomy/methods , Valsalva Maneuver/geneticsABSTRACT
The seroprevalence of the Influenza virus against H1N1 and H3N2 was determined by the hemagglutination-inhibition test (HI) and a commercial swine influenza ELISA kit, in 13 Argentinean swine herds. The results of within-herd and between-herd prevalence obtained by both tests were statistically correlated. The within-herd prevalence observed by the HI test varied from 38.46 to 100% against H1 and 7.69 to 100% for H3. When the within-herd prevalence was measured with the ELISA test, it varied from 2.33 to 6.9% for H1 and 9.65 to 48% for H3. No statistical differences were observed at herd level between HI and ELISA (H1: p = 0. 20; H3: p=0.11). No agreement between HI and ELISA detected prevalence was observed when the within-herd prevalence was compared (H1: 0.005; H3: 0.070), while the agreement at herd level was considered poor (H1: 0,350; H3: 0,235). The high within-herd prevalence values observed with the HI test and the high sensibility of this test might show that human strains or swine strains phylogenetically closely related to the humans strains used in the HI test in this study have been affecting the swine population since 2002.
Subject(s)
Antibodies, Viral/blood , Enzyme-Linked Immunosorbent Assay/veterinary , Hemagglutination Inhibition Tests/veterinary , Influenza A virus/isolation & purification , Orthomyxoviridae Infections/veterinary , Sus scrofa/virology , Swine Diseases/epidemiology , Animals , Argentina/epidemiology , Disease Reservoirs/veterinary , Humans , Influenza A Virus, H1N1 Subtype/immunology , Influenza A Virus, H1N1 Subtype/isolation & purification , Influenza A virus/classification , Influenza A virus/immunology , Influenza, Human/epidemiology , Influenza, Human/virology , Orthomyxoviridae Infections/diagnosis , Orthomyxoviridae Infections/epidemiology , Orthomyxoviridae Infections/virology , Predictive Value of Tests , Seasons , Sensitivity and Specificity , Seroepidemiologic Studies , Swine/virology , Swine Diseases/diagnosis , Swine Diseases/virologyABSTRACT
Se evaluó la prevalencia serológica del virus de influenza mediante las pruebas de inhibición de la hemaglutinación (IHA) y ELISA para los subtipos H1N1 y H3N2 en 13 granjas porcinas de Argentina. Se compararon los resultados obtenidos mediante ambas pruebas en términos individuales y de establecimientos. La prevalencia individual por la técnica de IHA fue de 38,46% a 100% para H1 y de 7,69% a 100% para H3. Por la técnica de ELISA, la prevalencia individual fue de 2,33% a 6,9% para H1 y de 9,65% a 48% para H3. No se observaron diferencias significativas entre ambas técnicas a escala de granja (H1: p=0,20; H3: p=0,11). La concordancia entre las pruebas fue nula al tomar como unidad de referencia el animal (H1: 0,005; H3: 0,070), mientras que en términos de establecimiento fue escasa (H1: 0,350; H3: 0,235). Considerando la alta prevalencia individual obtenida por la prueba de IHA y la alta sensibilidad de esta técnica, se podría sugerir que en las poblaciones porcinas de la Argentina circularon cepas virales humanas o cepas porcinas con gran proximidad filogenética a las utilizadas en este estudio desde el año 2002.
The seroprevalence of the Influenza virus against H1N1 and H3N2 was determined by the hemagglutination-inhibition test (HI) and a commercial swine influenza ELISA kit, in 13 Argentinean swine herds. The results of within-herd and between-herd prevalence obtained by both tests were statistically correlated. The within-herd prevalence observed by the HI test varied from 38.46 to 100% against H1 and 7.69 to 100% for H3. When the within-herd prevalence was measured with the ELISA test, it varied from 2.33 to 6.9% for H1 and 9.65 to 48% for H3. No statistical differences were observed at herd level between HI and ELISA (H1: p = 0. 20; H3: p=0.11). No agreement between HI and ELISA detected prevalence was observed when the within-herd prevalence was compared (H1: 0.005; H3: 0.070), while the agreement at herd level was considered poor (H1: 0,350; H3: 0,235). The high within-herd prevalence values observed with the HI test and the high sensibility of this test might show that human strains or swine strains phylogenetically closely related to the humans strains used in the HI test in this study have been affecting the swine population since 2002.
Subject(s)
Animals , Humans , Antibodies, Viral/blood , Enzyme-Linked Immunosorbent Assay/veterinary , Hemagglutination Inhibition Tests/veterinary , Influenza A virus/isolation & purification , Orthomyxoviridae Infections/veterinary , Sus scrofa/virology , Swine Diseases/epidemiology , Argentina/epidemiology , Disease Reservoirs/veterinary , Influenza A Virus, H1N1 Subtype/immunology , Influenza A Virus, H1N1 Subtype/isolation & purification , Influenza A virus/classification , Influenza A virus/immunology , Influenza, Human/epidemiology , Influenza, Human/virology , Orthomyxoviridae Infections/diagnosis , Orthomyxoviridae Infections/epidemiology , Orthomyxoviridae Infections/virology , Predictive Value of Tests , Seasons , Sensitivity and Specificity , Seroepidemiologic Studies , Swine Diseases/diagnosis , Swine Diseases/virology , Swine/virologyABSTRACT
In this study, the diagnosis of fatal disseminated toxoplasmosis in three captive slender-tailed meerkats (Suricata suricatta) in the zoo of La Plata, Argentina and the invitro isolation and molecular characterization of Toxoplasma gondii are reported. The animals showed depression, dyspnea and hypothermia, and also ataxia in one case, and died within 1-5 days. The main histopathological lesions included interstitial pneumonia, non-suppurative inflammatory changes and focal necrosis in liver, spleen, kidney and brain. Tachyzoites or tissue cysts were present in lung, liver, spleen, brain, striated muscle, kidney, intestine and mesenteric lymph node sections, and stained strongly with T. gondii antiserum in immunohistochemical analysis. T. gondii was isolated in Swiss mice and in bovine monocytes cultures from tissues of one of the meerkats. The isolate was cryopreserved and it was named TG-Suricata-1. T. gondii DNA was demonstrated in tissues of all three animals and in tachyzoites isolated in cell cultures. The PCR-RFLP analysis of markers based in the loci 3'-SAG2, 5'-SAG2, BTUB, GRA6, SAG3, c22-8, L358, PK1, c29-2 and Apico of T. gondii produced patterns corresponding to the clonal type III. Type III strains of T. gondii possess no or only little virulence in the mouse model, however their association with virulence in other animal species is uncertain. In the present case, T. gondii of the clonal lineage III was responsible for fatal cases in S. suricatta. To our knowledge, this is the first report of isolation and genotyping of T. gondii from S. suricatta.
Subject(s)
Herpestidae , Toxoplasma/genetics , Toxoplasma/isolation & purification , Toxoplasmosis, Animal/parasitology , Animals , Animals, Zoo , Argentina/epidemiology , Cattle , Cells, Cultured , Lung/parasitology , Lung/pathology , Mice , Monocytes/parasitology , Toxoplasmosis, Animal/epidemiology , Toxoplasmosis, Animal/pathologyABSTRACT
This report describes an alternative technique to inoculate rabbits and to reproduce infection by Bovine herpesvirus 1 and 5. First, the nostrils are anaesthetized by aspersion with local anaesthetic. A few seconds later, and after proving the insensitivity of the zone, the rabbits are put on their back legs with their nostrils upwards and the inoculum is introduced slowly into each nostril by using disposable droppers. Clinical signs, viral isolation from nasal swabs, histological lesions found, positive polymerase chain reaction and antibodies production confirm the infection. This very simple and bloodless technique, where the animals are exposed to minor distress, may be useful for evaluating the virulence of BoHV-1 and BoHV-5 strains, to study the establishment of latent virus infection and to test the potential of experimental vaccines or properties of antiviral drugs. It may be also suitable for experimental infection with other respiratory viruses in this animal model.
