Safety and Feasibility of Skin-to-Skin Contact in the Delivery Room for High-Risk Cardiac Neonates.

Early skin-to-skin contact (SSC), beginning in the delivery room, provides myriad health benefits for mother and baby. Early SSC in the delivery room is the standard of care for healthy neonates following both vaginal and cesarean delivery. However, there is little published evidence on the safety of this practice in infants with congenital anomalies requiring immediate postnatal evaluation, including critical congenital heart disease (CCHD). Currently, the standard practice following delivery of infants with CCHD in many delivery centers has been immediate separation of mother and baby for neonatal stabilization and transfer to a different hospital unit or a different hospital altogether. However, most neonates with prenatally diagnosed congenital heart disease, even those with ductal-dependent lesions, are clinically stable in the immediate newborn period. Therefore, we sought to increase the percentage of newborns with prenatally diagnosed CCHD who are born in our regional level II-III delivery hospitals who receive mother-baby SSC in the delivery room. Using quality improvement methodology, through a series of Plan-Do-Study-Act cycles we successfully increased mother-baby skin-to-skin contact in the delivery room for eligible cardiac patients born across our city-wide delivery hospitals from a baseline 15% to greater than 50%.

[Lung cancer screening - risk stratification : Who should undergo screening?]. / Bronchialkarzinomscreening - Risikostratifizierung : Wer soll gescreent werden?

Lung cancer is one of the leading causes of deaths in Europa and the USA. In approximately 75 % of lung cancer patients, bronchogenic carcinoma is detected at an advanced tumor stage; therefore, therapeutic options which aim at curing the disease in these patients are limited and treatment is mostly palliative. A relatively good prognosis is reserved for the minority of patients where the tumor is detected at an early stage and treatment is potentially curative. For this reason, early diagnosis of lung cancer could save lives. Retrospective analyses of the US national lung screening trial (NLST) showed that especially high-risk populations (e. g. higher age, positive smoking history, overweight and a positive family history for lung cancer) benefit most from lung cancer screening. Thus, the effectiveness of computed tomography (CT) screening can be improved by focusing on high-risk populations. This review article summarizes the risk stratification models of the large European and American screening studies and discusses possible future biomarkers for risk stratification.

Evaluation of the impact of formaldehyde fumigation during the hatching phase on contamination in the hatch cabinet and early performance in broiler chickens.

Commercial hatch cabinet environments promote replication of microorganisms. These pathogenic or apathogenic microorganisms may serve as pioneer colonizers of the gastrointestinal tract (GIT) of poultry. Some of these pioneer colonizers, such as Escherichia coli and Enterococcus spp., are opportunistic pathogens that lead to reduced performance in commercial poultry. Effective hatchery sanitation is imperative to limit contamination of naïve neonatal chicks and poults. Formaldehyde fumigation has been traditionally used to reduce the pathogen load in commercial hatch cabinets. To investigate potential alternatives to formaldehyde fumigation, models to mimic the microbial bloom in a laboratory setting must be utilized. The purpose of the present study was to evaluate the impact of a multispecies environmental challenge model (PM challenge) with and without formaldehyde fumigation during the hatching phase on early performance in broiler chicks. Three experiments were conducted to evaluate microbial contamination in the hatch cabinet environment (air samples, fluff samples), enteric colonization at day-of-hatch (DOH), and 7-day performance. In all experiments, significantly (P < 0.05) more gram-negative bacteria were recovered from the GIT at DOH in the PM challenge control group as compared to the nonchallenged control (NC) group and the formaldehyde-treated group (PM + F). There were no statistical differences in 7-day body weight gain or feed conversion ratio between the PM challenge control group, the NC group or the PM + F group. These data suggest this model could be utilized to evaluate alternatives to formaldehyde fumigation for controlling the microbial load during the hatching phase in a laboratory setting.

Evaluation of Eimeria adenoeides Preinfection on the Severity of Histomoniasis in Turkeys.

The objectives of this study were to evaluate whether a preinfection of Eimeria adenoeides (EAD) or Eimeria tenella (ET) could affect the severity of subsequent histomoniasis in turkeys (Experiment 1) and if previous exposure to EAD infection, when a single or multiple inoculations of EAD were administered with sufficient time for complete cecal recovery, would affect the severity of HM incidence and lesions (Experiment 2). In Experiment 1, 200 poults were assigned to 1 of 5 groups, as follows: unchallenged negative control, positive challenge control inoculated with 105 HM, EAD at 500 oocysts/bird and Histomonas meleagridis (HM), EAD at 2500 oocysts/bird and HM, or ET at 9 × 106 oocysts/bird and HM. ET and EAD were inoculated on day 15 and HM on day 20. In Experiment 2, the trial consisted of two different challenge ages to evaluate short- or long-term EAD effects before HM challenge. Poults (n = 260) were assigned to either early-HM-challenged groups (HM on day 19 challenge control or EAD at 2500 oocysts/bird on day 14 with HM on day 19) or late-HM-challenged groups (HM on day 35 challenge control, EAD at 2500 oocysts/bird on day 14 and HM on day 35, or EAD at 100 oocysts/bird every 2-3 days during the first 3 weeks and HM on day 35). An unchallenged negative-control group was used for both the early- and late-challenge phases in Experiment 2. Mortalities were recorded, and surviving poults were scored for histomoniasis-related hepatic and cecal lesions. In Experiment 1, preinfection with both doses of EAD reduced the mortality as well as the cecal and hepatic lesions caused by histomoniasis. In Experiment 2, neither short- nor long-term preinfection with EAD had an effect on histomoniasis-related mortality or lesions. Differences between Experiments 1 and 2 may be due to the level of infection caused by the prechallenge with EAD and the resulting destruction of cecal tissue.

Evaluación de la preinfección por Eimeria adenoeides sobre la severidad de la histomoniasis en pavos. Los objetivos de este estudio fueron evaluar si una preinfección por Eimeria adenoeides (EAD) o Eimeria tenella (ET) podría afectar la severidad de la histomoniasis subsequente en pavos (Experimento 1); y si la exposición previa a la infección por E. adenoeides, cuando se administraron una o varias inoculaciones de E. adenoeides con tiempo suficiente para la completa recuperación cecal, afectaría la gravedad de la incidencia y las lesiones de Histomonas meleagridis (Experimento 2). En el Experimento 1, se asignaron 200 pavipollos en cinco grupos, de la siguiente manera: control negativo no desafiado, control de desafío positivo inoculado con 105 de H. meleagridis, un grupo con E. adenoeides a 500 ooquistes/ave e H. meleagridis (HM), otro grupo con E. adenoeides a 2500 ooquistes/ave y H. meleagridis, o E. tenella a 9×106 ooquistes/ave y H. meleagridis. Se inocularon E. tenella y E. adenoeides el día 15 y H. meleagridis el día 20. En el Experimento 2, el ensayo consistió en dos edades de exposición diferentes para evaluar los efectos de E. adenoeides a corto o largo plazo antes del desafío con H. meleagridis. Los pavipollos (n = 260) se asignaron a los grupos de desafío temprano con H. meleagridis (H. meleagridis en el día 19 en el grupo control de desafío o E. adenoeides con 2500 ooquistes/ave el día 14 y con H. meleagridis en el día 19) o los grupos de desafío tardío con H. meleagridis (H. meleagridis en el día 35 del control de desafío, E. adenoeides a 2,500 ooquistes/ave el día 14 y H. meleagridis en el día 35, o E. adenoeides con 100 ooquistes/ave cada 2-3 días durante las primeras 3 semanas y H. meleagridis en el día 35). En el Experimento 2, se utilizó un grupo de control negativo no desafiado para ambas fases de exposición temprana y tardía. Se registraron la mortalidad y los pavipollos supervivientes se asignaron puntuaciones en cuanto a lesiones hepáticas y cecales relacionadas con histomoniasis. En el Experimento 1, la preinfección con ambas dosis de E. adenoeides redujo la mortalidad, así como las lesiones cecales y hepáticas causadas por histomoniasis. En el Experimento 2, ni la preinfección a corto ni a largo plazo con E. adenoeides tuvo un efecto sobre la mortalidad o las lesiones relacionadas con la histomoniasis. Las diferencias entre los Experimentos 1 y 2 pueden deberse al nivel de infección causado por el desafío previo con E. adenoeides y la destrucción resultante del tejido cecal.

Cost-effectiveness of pharmacy-led versus conventionally delivered antiviral treatment for hepatitis C in patients receiving opioid substitution therapy: An economic evaluation alongside a pragmatic cluster randomised trial.

BACKGROUND: Elimination targets for hepatitis C have been set across the world. In the UK almost 90% of infections are in people who inject drugs. Evidence shows community case-finding is effective at identifying and treating undiagnosed patients. The aim of this analysis was to assess, from a healthcare provider perspective, the cost-effectiveness of a new pharmacist-led test and treat pathway for hepatitis C in opioid agonist treatment (OAT) patients attending community pharmacies compared to conventional care. METHODS: In a cluster randomised controlled trial, pharmacies were randomised to the pharmacist-led or conventional care pathway. Mean cost per OAT patient and per patient initiating treatment was identified for each pathway. A Markov model tracking disease progression was developed, with a 50-year time horizon and 3·5% time discount rate, to estimate the incremental cost-effectiveness ratio (ICER) per quality-adjusted life-year (QALY) gained and the probability of being cost-effective at a £30,000 per QALY willingness-to-pay threshold. Probabilistic sensitivity analysis was performed for a range of drug discounts, re-infection rates, and model assumptions. FINDINGS: Mean cost per OAT patient (£3,674 vs £1,965) and per patient initiating treatment (£863 vs £404) was higher in the pharmacist-led pathway, due to higher uptake of testing and pharmacist time requirements. Over a 50-year time horizon the ICER per QALY gained was £31,612 at NHS indicative price for treatment (£38,979 for 12 weeks) and 12·1/100 person-years re-infection rate, reducing to £21,027/£10,220/-£501 per QALY gained with 30%/60%/90% drug price discounts and £25,373/£21,738/£14,912 per QALY gained at re-infection rates of 8/5/2 per 100 person-years. At 30%/60%/90% drug discount rates, the pharmacist-led pathway has an 80%/98%/100% probability of being cost-effective. INTERPRETATION: The pharmacist-led pathway is effective at increasing testing and treatment uptake, with cost-effectiveness being highly dependent on drug price discounts. FUNDING: Trial funding provided by the Scottish Government, Gilead Sciences, and Bristol-Myers Squibb.

Evaluation of live-attenuated Histomonas meleagridis isolates as vaccine candidates against wild-type challenge.

Repeated serial in vitro passage of Histomonas meleagridis, the etiological agent of histomoniasis (blackhead) of turkeys, was demonstrated to markedly achieve attenuation and reduction of virulence as compared to the original wild-type isolate. Four experiments were performed to evaluate the route (oral vs. intracloacal) and age (day-of-hatch vs. d 14) for administration of attenuated H. meleagridis isolates as vaccine candidates against homologous or heterologous wild-type challenge. Attenuated H. meleagridis were developed from 2 different strains (Buford strain originating in Georgia; PHL2017 strain originating in Northwest Arkansas). Buford P80a (passage 80, assigned as isolate lineage "a" following repeated passage) was selected as the primary vaccine candidate and was evaluated in Experiments 1-3. Experiment 4 evaluated selected candidates of attenuated PHL2017 (P67, P129) and Buford (P80a, P200a, P138b, P198c) strains against Buford wild-type challenge. As has been demonstrated previously, wild-type H. meleagridis cultures administered orally after 1 day of age were not infective in the current studies, but infection with wild-type cultures could be induced orally at day-of-hatch. Infection was effectively achieved via the intracloacal route at day-of-hatch and in older turkeys (d 21, d 28-29, d 35). Intracloacal inoculation of turkeys with the attenuated passaged isolates as vaccine candidates at d 14 was shown to produce significant (P < 0.05) protection from mortality, reduction in body weight gain, as well as reduction in hepatic and cecal lesions in these experiments following challenge with either the homologous wild-type isolate or from a wild-type strain obtained years later from a geographically disparate area of the United States. Inoculation with the attenuated H. meleagridis isolates at day-of-hatch, either orally or cloacally, did not produce significant protection against subsequent wild-type challenge. While offering significant protection with minimal vaccine-related negative effects, the protection from cloacal vaccine administration was neither significantly robust nor encouraging for industry application using the methods evaluated in the present manuscript since mortalities and lesions were not completely reduced which could thereby potentially allow transmission from residual infection and shedding within a flock.

Development of an environmental contamination model to simulate the microbial bloom that occurs in commercial hatch cabinets.

Microbial blooms that emerge in commercial hatch cabinets consist of apathogenic and pathogenic microorganisms, including Escherichia coli, Enterococcus faecalis, and Aspergillus fumigatus. Objectives of the present study included the development of a multipathogen contamination model to mimic commercial conditions and optimization of sampling methods to quantify bacterial or fungal presence within the hatch cabinet. The pathogen challenge mix (PM) was recreated from select bacterial or fungal isolates recovered from an egg homogenate (EH) derived from the contents of infertile eggs and late embryonic mortalities. Isolates selected for PM included Enterococcus faecalis (∼108 CFU/egg), Staphylococcus aureus (∼107 CFU/egg), Staphylococcus chromogenes (∼107 CFU/egg), Aspergillus fumigatus (∼106 spores/egg), and 2 Escherichia coli (∼108 CFU/egg) isolates. Challenge (100 µL of PM or EH) was administered using a sterile loop to a 28 mm area on the blunt end of the eggshell at day 19 of embryogenesis (DOE). In 3 experiments, microbiological data were collected from environmental hatcher samples (open-agar plate method), fluff samples, postmortem whole-body chick rinse samples, and gastrointestinal tract (GIT) samples to evaluate select bacteria and fungi circulating within the hatch cabinet and colonization of GIT. Cumulative bacterial and fungal recovery from the PM hatching environment from DOE20 to hatch was higher than the nonchallenged group (NC) and EH group at ∼860 and ∼1,730 CFU, respectively. Bacterial recovery from GIT, fluff, and chick rinse samples were similar for the PM and EH group in Exp. 1. However, Aspergillus fumigatus recovery from fluff and chick rinse samples for the PM group was significantly (P < 0.001) higher than the NC and EH group. In Exp. 2 and 3, PM challenge significantly (P < 0.05) increased Gram-negative bacterial recovery from the GIT, fluff and chick rinse samples compared to both the NC and EH group. These data suggest this innovative multispecies environmental contamination model using PM could be utilized to evaluate strategies to mitigate microbial contamination in commercial hatch cabinets in a laboratory setting.

Research Note: Evaluation of quinine as a chemoprophylactic candidate against histomoniasis in turkeys.

Histomoniasis, also commonly referred to as blackhead disease, is caused by the protozoan parasite Histomonas meleagridis. Since the removal of nitarsone in 2015, no approved prophylactics are available for mitigating histomoniasis. Disease incidence and high mortalities are frequently associated with turkey flocks, although infection of broiler breeders also occurs. Quinine is a naturally occurring alkaloid with antimalarial properties. In vitro assays have shown strong antihistomonal properties of quinine, leading to our hypothesis that quinine inclusion within the feed could prevent histomoniasis in turkeys. Selected concentrations of quinine were included within a turkey starter diet to evaluate effects on body weight gain (BWG), liver lesions, cecal lesions, and mortality of H. meleagridis-challenged turkeys. On day-of-hatch, poults were randomly assigned to either the basal diet or a quinine diet. Groups consisted of a non-challenged control (NC; basal diet), 0.022% quinine + challenge, 0.067% quinine + challenge, 0.2% quinine + challenge, or a positive-challenged control (PC; basal diet). On d 10, challenged groups were intracloacally inoculated with 105H. meleagridis cells/turkey, and lesions were evaluated on d 21 post-infection. Individual body weights were recorded on d 0, d 10, and d 31 to calculate the pre-challenge and post-challenge BWG. No significant differences (P > 0.05) were observed between the d 0 to 10 pre-challenged BWG between quinine treatment diets and the basal diet. Similarly, no differences (P > 0.05) were observed in post-challenge d10-31 BWG of the quinine dietary treatments as compared to the PC. Cumulative mortalities, liver lesions, and cecal lesions related to histomoniasis were not reduced (P > 0.05) in any of the quinine treatment groups as compared to the PC. Although quinine successfully reduced H. meleagridis cells in vitro, results from the in vivo experiment indicated no reduction in histomoniasis severity as evidenced by similar lesions and mortality as the PC. Taken together, these data indicate that quinine inclusion within the feed at these concentrations and under these experimental conditions was not efficacious in the prevention or treatment of histomoniasis.

Research Note: Fate and dissemination of Salmonella enterica serovar reading in turkeys at processing using an oral gavage challenge model.

This study aimed to evaluate the fate and dissemination of Salmonella Reading (SR) in turkeys using an oral gavage challenge model. One hundred twenty-eight-week-old commercial turkey hens were moved from commercial production to research facilities. Upon arrival, a combination of enrofloxacin, 10 mg/kg, and florfenicol, 20 mg/kg, were orally administered sequentially before comingled placement on fresh pine shavings. Turkeys were challenged with 108 cfu SR by oral gavage on d 4 and 7 postplacement. Subsets were subjected to simulated commercial processing on d 14 (n = 40), 21 (n = 40) and 28 (n = 32) postplacement (corresponding to 10, 11, and 12 wk of age). Stifle joint, skin, trachea, crop, lung, liver + spleen (LS), and ceca were aseptically sampled and cultured for Salmonella recovery and serotyping. SR could not be recovered from stifle joint 14 d post inoculation (PI). However, at 14 d PI, recovery of SR were: Skin 80%; crop 75%; LS 67.5%; lungs 60%; and ceca 57.5%. (P < 0.01). Interestingly, the lowest recovery of SR was observed from trachea (40%). At 21 d PI, the highest rate of positive samples to SR were observed in ceca (87.5%) and crop (67.5%). By 28 d PI, SR was only recovered from ceca (75%); crop (43.8%); lung (34.4%); and LS (21.9%). The results of this study confirms that SR is an emerging problem for the turkey industry and immediate measurements to reduce foodborne pathogens such as Salmonella should target all parts of the supply chain and consumer education about food safety.

The reliability of the patellotrochlear index on magnetic resonance imaging for measuring patellofemoral height.

BACKGROUND: The purpose of this study was to determine the inter- and intra-observer reliability of the patellotrochlear index (PTI) on magnetic resonance images (MRI) in patients with patellofemoral pain. The correlation between the PTI measured on MRI and the modified Insall-Salvati (MIS) ratio measured on radiographs was also assessed. METHODS: The PTI was assessed on MRI images and the MIS ratio on radiographs of 66 knees of 62 patients. Assessment was performed by two orthopaedic surgeons, one orthopaedic surgery registrar, two radiologists and one radiology registrar. Correlation coefficients, standard errors of measurement and limits of agreement were calculated for the PTI. To assess the association between the PTI and the MIS ratio, the Pearson's correlation coefficient was calculated. RESULTS: The PTI showed good interobserver reliability (intraclass correlation coefficient (ICC) 0.79; 95% confidence interval (CI) 0.73-0.85) and excellent intra-observer reliability (ICC 0.90; 95% CI 0.89-0.91). The standard error of measurement was 0.05 and limits of agreement with the mean ± 0.09. A very weak and not significant correlation was found between the PTI and the MIS (r = 0.02; P = 0.77). CONCLUSIONS: The PTI showed good interobserver reliability and excellent intra-observer reliability. In order to conclude which measurement method of assessing patellar height is truly the most reliable, future studies should investigate agreement parameters (standard error of measurement, limits of agreement) besides solely correlation coefficients. We found a very weak correlation between the PTI and the MIS which suggests that at least one index has poor validity. Future validity studies on indices to assess patellar height are necessary.

Research Note: Evaluation of boric acid as a chemoprophylaxis candidate to prevent histomoniasis.

Histomoniasis, caused by the protozoan parasite Histomonas meleagridis, is a disease to which turkeys are especially susceptible. Currently, no chemoprophylaxis compounds are available to mitigate this disease. Boric acid (BA) exhibits antifungal, antiseptic, and antiviral properties and has been used in the treatment of yeast infections. Based on these characteristics, an experiment was conducted to evaluate whether BA might be an efficacious prophylaxis against challenge with wild-type H. meleagridis (WTH). On day-of-hatch, poults were randomly assigned to either a basal control diet or a BA diet (basal diet + 0.2% BA). Groups consisted of a nonchallenged control (NC; basal diet), 0.2% BA + challenge (BA; 0.2% BA diet), and a positive-challenged control (PC; basal diet). On day 21, challenged groups were intracloacally inoculated with 2 × 105 WTH cells/turkey, and lesions were evaluated on day 14 postchallenge. Individual body weights were recorded on day 0, 21, and 35 to calculate the prechallenge and postchallenge body weight gain (BWG). The BA group resulted in lower prechallenge day 0 to day 21 BWG (P = 0.0001) than the NC group. Postchallenge day 21 to day 35, BWG was also lower (P = 0.0503) in the BA group than the PC group. No differences between the BA and PC groups were detected for mortalities associated with histomoniasis. Moreover, liver and cecal lesions were not statistically different between the BA and PC groups. Taken together, these data suggest that BA was not efficacious in the prevention or reduction of histomoniasis disease severity when provided at 0.2% dietary concentration under these experimental conditions.

Research Note: Evaluation of dietary administration of sodium chlorate and sodium nitrate for Histomonas meleagridis prophylaxis in turkeys.

Histomoniasis is currently a re-emerging disease of major significance for many commercial turkey and broiler breeder production companies because of the unavailability of drugs or vaccines. The protozoa Histomonas meleagridis (HM) requires the presence of enteric microflora to promote the disease. The objectives of this research note were to evaluate the effect of dietary administration of sodium chlorate (SC) and sodium nitrate (SN) in vitro and in vivo for HM prophylaxis in poults. A total of 128 day-of-hatch female poults obtained from a commercial hatchery were wing-tagged and randomly assigned into 1 of 4 experimental groups: negative control (NC), positive control, dietary inclusion of SC (3,200 ppm) and SN (500 ppm). Poults from groups SC and SN started on their respective diets on day 12. All groups, except the NC, were challenged with 2 × 105 HM on day 19. Controls were fed a basal diet, identical to the treatment diets but not supplemented with SC or SN. Body weight gain (BWG) was determined weekly, starting on day 1 until day 28, and postchallenge morbidity and mortality were recorded. On day 28 of age, all surviving poults were lesion scored for hepatic and cecal lesions. Ceca and distal ileum were collected on day 28 for bacterial recovery on selective media for total aerobic, lactic acid bacteria, or gram-negative bacteria. The addition of SC and SN in the in vitro growth of HM greatly reduced the growth of the protozoa after 20 h of incubation when compared with the control nontreated group (P < 0.05). However, dietary supplementation of SC and SN had no effect against HM in vivo, as was demonstrated by BWG, the severity of lesions in the liver and ceca or bacterial recovery of treated poults when compared with the positive control group.

Research Note: Evaluation of deoxycholic acid for antihistomonal activity.

Deoxycholic acid (DCA) is a naturally occurring secondary bile acid that originates from intestinal bacterial metabolic conversion of cholate, a primary bile acid. Deoxycholic acid was shown to have antihistomonal properties in vitro, leading to our hypothesis that DCA inclusion within the feed might prevent histomoniasis. Selected dietary concentrations of DCA were evaluated for effects on body weight gain (BWG), lesions, and mortality of turkeys challenged with wild-type Histomonas meleagridis (WTH). Treatments consisted of non-challenged control (NC; basal diet), 0.25% DCA diet + challenge, 0.5% DCA diet + challenge, 1% DCA diet + challenge, and a positive-challenged control (PC; basal diet). All groups were fed a basal starter diet until day 7, at which time DCA diets were administered to the respective groups. On day 14, 2 × 105 WTH cells/turkey were intracloacally administered. H. meleagridis-related lesions were evaluated on day 13 post-challenge. Pre-challenge day 0 to 14 BWG was higher (P ≤ 0.05) in the 0.25% DCA group than in the 1% DCA group. There were no significant differences in pre-challenge day 0 to 14 BWG between any of the other groups. No significant differences in mortalities from histomoniasis occurred in the DCA groups as compared to the PC group. No H. meleagridis lesions or mortalities were observed at any time in the NC group. Presence of H. meleagridis-related liver lesions was higher (P ≤ 0.05) in the 0.5% DCA group as compared to the PC group. Using the same controls and experimental timeline, an additional group was included to evaluate a biliogenic diet formulated with 20% whole egg powder to encourage endogenous bile acid production. The biliogenic diet had no statistical impact on pre-challenge day 0 to 14 BWG, but did not reduce H. meleagridis-related mortalities or lesions after the challenge. Taken together, these data suggest that DCA inclusion within the feed at these concentrations and under these experimental conditions does not prevent histomoniasis.

Evaluation of autofluorescent Eimeria maxima oocysts as a potential indicator of non-viability when enumerating oocysts.

Aging, poor oxygenation, or improper storage temperature can lead to variable Eimeria oocyst viability, which is not readily assessed microscopically. Under fluorescent microscopy, some aged Eimeria maxima (EM) oocysts were strongly autofluorescent (AF) within the oocystoplasm and sporocysts, whereas others were distinctly non-fluorescent, leading to the hypothesis that non-viable oocysts may be detectible using this simple approach. Using accelerated aging conditions at 45°C, two experiments were conducted to evaluate variable percentages of autofluorescent EM oocysts on body weight gain (BWG), lesion scores (LS), and total oocyst shedding (OS) per bird. Through oral gavage, EM oocysts were administered on d10, whereas LS and BWG were determined d5 post-inoculation. Experiment 1 groups consisted of non-challenged controls (n = 15), or 25,000 EM exhibiting 12.8% (n = 14), 61.1% (n = 10), or 93.3% (n = 10) autofluorescence. BWG in 12.8% AF group was lower (P = 0.054) than non-challenged control. LS were higher (P < 0.05) in 61.1% and 12.8% AF groups as compared to non-challenged control and 93.3% AF groups. Experiment 2 groups consisted of non-challenged controls (LS n = 20/BWG n = 40), or 22,500 EM exhibiting 7% AF (LS n = 20/BWG n = 40), 80.6% AF (LS n = 19/BWG n = 39), or 99% AF (LS n = 19/BWG n = 39). BWG in 7% AF group was lower (P < 0.05) than non-challenged control and 99% AF groups. LS were higher (P < 0.05) in 80.6% and 7% AF groups as compared to non-challenged control and 99% AF groups. OS from d5-8 post-inoculation was determined for each of five replicates per group (n = 20/group; n = 4/replicate), with higher (P < 0.05) OS in 80.6% and 7% AF groups than in non-challenged control or 99% AF groups. Taken together, data indicate lower LS, higher BWG, and reduced OS with higher %AF oocysts, consistent with the hypothesis of lowered viable challenge with this EM isolate.

Relation between coronary artery stenosis and myocardial purine metabolism, histology and regional function in humans.

In 54 patients undergoing elective or emergency aortocoronary bypass grafting, angiographic and electrocardiographic changes were studied. Five patients with unstable angina and five patients with evolving myocardial infarction were included. High energy phosphate metabolism and the histologic appearance of the myocardium were analyzed in transmural biopsy specimens acquired at the time of surgery. In patients without anterior infarction on the electrocardiogram, severe stenosis of the left anterior descending coronary artery resulted in a reduction of anterior wall motion that was associated with a partial depletion of the adenylate pool. Mitochondrial function, however, remained intact: the adenosine diphosphate/adenosine triphosphate ratio, the energy charge and the creatine phosphate/adenosine triphosphate ratio were in the normal range. Histologic assessment demonstrated viable myocardium with a high incidence of atrophic cells. In evolving myocardial infarction, 170 minutes of acute coronary artery obstruction resulted in anterior wall akinesia associated with a decrease of the sum of the adenylates to 52% and of creatine phosphate to 16% of their normal value (p less than 0.05). The nucleosides accumulated; their major fraction (91%) was inosine. The adenosine diphosphate/adenosine triphosphate ratio increased from 0.14 +/- 0.04 to 0.49 +/- 0.20 (p less than 0.01) and the energy charge decreased from 0.924 +/- 0.021 to 0.660 +/- 0.169 (p less than 0.01). Ultrastructure examination revealed irreversible cell damage in at least the subendocardial layer. These results suggest that the energetic base of reduced contractility due to severe coronary artery stenosis is different from that in acute coronary obstruction.(ABSTRACT TRUNCATED AT 250 WORDS)

[Radical treatment of rectal cancer]. / Radikálna liecba rakoviny konecníka.

The authors present an account on radical resections of the rectum in 73 patients during 1991-1995. A radical operation with excision of the mesorectum was performed 69 times, local excisions 4 times. Five-year survival was recorded in 57.90% patients, local relapses were recorded in 10.14% patients. Remote metastases or generalization of the disease was found in 18.84% patients. Adjuvant treatment was administered to 74% patients.

Ventilation during cardiopulmonary bypass: impact on heat shock protein release.

AIM: Cardiopulmonary bypass (CPB), utilized in on-pump coronary artery bypass graft procedures (CABG) induces generalized immune suppression, release of heat shock proteins (HSP), inflammatory markers and apoptosis-specific proteins. We hypothesized that continued mechanical ventilation during cardiopulmonary bypass attenuates immune response and HSP liberation. METHODS: Thirty patients undergoing conventional coronary artery bypass graft (CABG) operation were randomized into a ventilated on CPB (VG; N.=15) and a non-ventilated CPB group (NVG; N.=15). Blood samples were drawn at the beginning and end of surgery, as well as on the five consecutive postoperative days (POD). Molecular markers were measured by ELISA. Data are given as mean ± (SD). Mann-Whitney-U-test was used for statistical analysis. RESULTS: Serum concentrations of HSP70 were significantly lower in VG compared to NVG on POD-1 (VG: 1629±608 vs. NVG: 5203±2128.6 pg/mL, P<0.001). HSP27 and HSP60 depicted a minor increase in both study groups at the end of surgery without any intergroup differences (HSP27: VG 6207.9±1252.5 vs. NVG 7424.1±2632.5; HSP60: VG 1046.2±478.8 vs. NVG 1223.5±510.1). IL-8 and CK-18 M30 evidenced the highest serum concentrations at the end of surgery (IL-8: VG 119.5±77.9 vs. NVG 148.0±184.55; CK-18 M30: VG 62.1±39.2 vs. NVG 67.5±33.9) with no differences between groups. Decreased ICAM-1 serum concentrations were detected postoperatively, however ICAM-1 concentrations on POD-1 to POD-5 showed slightly elevated concentrations in both study groups with no intergroup differences. CONCLUSION: Significantly less HSP70 was detectable in patients receiving uninterrupted mechanical lung ventilation on CPB, indicating either different inflammatory response, cellular stress or cell damage between the ventilated and non-ventilated group. These data suggest that continued mechanical ventilation has a modulatory effect on the immune response in patients after CABG surgery.

High levels of lung resident CD4+CD28null cells in COPD: implications of autoimmunity.

Chronic obstructive pulmonary disease (COPD) is a worldwide burden and a major cause of death. Pathogenetic mechanisms underlying the disease are still largely unknown. However, a continuous toxic injury due to tobacco smoking leading to a self-maintaining inflammatory process is considered a key factor in the pathophysiology of the disease. Evidence that autoimmunity might be involved in the maintenance of COPD has been recently noticed with great interest.During the chronic phase of an autoimmune response, lymphocytes lose their costimulatory signals. Previously, CD4+CD28null cells were reported to be systemically heightened in COPD patients. However, a direct role of CD4+CD28null cells in the pathogenesis of COPD is still under discussion, since there is no evidence that CD4+CD28null cells originate from the lungs of diseased patients. Therefore, we evaluated lungs from end-stage COPD patients and compared the levels of tissue infiltrating CD4+CD28null cells to systemic levels. We could show that CD4+CD28null cells are present in high amounts in lung tissue obtained from COPD GOLD IV patients suggesting a direct involvement of those cells in the pathophysiology of COPD. Furthermore, purified lung-resident CD4+ cells showed a stable proliferative response to lung specific elastin and collagen.These results further corroborate the role of autoreactive CD4+ cells in the maintenance of the inflammatory destruction in COPD. Modulating CD4+ cell function might be a new promising tool for future therapeutic approaches.

Linking employee burnout to medical aid provider expenditure.

BACKGROUND: Healthcare has become a major expense. Burnout and its connection with psychological and physical health is well researched, yet little research has been done on the connection between burnout and financial outcomes, specifically as indicated by the costs incurred by medical aid providers as a result of members' claims. OBJECTIVE: To investigate the connection between employee burnout and medical aid claims and expenditure data in a sample from the private sector. METHOD: A cross-sectional design was used. The sample comprised 3 182 participants. The available objective medical aid expenditure data connected with each participant were: total insured benefits, general practitioner visits, specialist visits, general practitioner insured benefits, and claims for medicine. A low and a high burnout group were extracted, based on comorbidity of the two core components of burnout. Analysis of covariance (ANCOVA) was then applied to investigate the differences in estimated marginal means of the expenditures on the low and the high burnout contrast groups, while controlling for age and gender. RESULTS: The high burnout group frequented a general practitioner more often, and the medical aid provider expenditure was nearly double that of the low burnout group, on all the variables. Specialist visits did not show a significant result. CONCLUSION: High burnout is associated with a higher expenditure by a medical aid provider, compared with low burnout, per member. Stakeholders should therefore address burnout to reduce expenditure and promote health.