ORCHID BEE COMMUNITY STRUCTURE IN OPEN AND FORESTED SITES IN A TROPICAL CLOUD FOREST REGION OF COSTA RICA

We examined the structure of orchid bee (Apidae: Euglossini) communities in different habitat types in the tropical cloud forest region near San Luis, Monteverde, Costa Rica. Because previous studies have shown that orchid bee community composition can differ in habitats with varying levels of disturbance, we investigated potential differences in orchid bee community structure between open sites (unforested areas near buildings and/or roads) and forested sites (areas of dense understory and canopy vegetation) over a 5-day period in June 2019. 10 traps were placed in both open and forested areas and all traps were at least 100 m apart. Traps consisted of 3.8 L containers with a single opening and were baited with a chemical attractant that was replenished daily. Traps were checked each day and all orchid bees collected were euthanized and identified to species. Shannon diversity, species evenness, and species abundance were compared between open and forested sites using t-tests, though no significant differences were found. Overall richness was higher in forested areas (17 species vs. 13 species in open areas). We also found more endemic species and fewer widespread species in the forested areas as compared to open sites. Differences in species composition were observed between habitat types; for example, Euglossa imperialis dominated open areas while Euglossa dilemma dominated forested areas. Though short-term, our study is part of an ongoing long-term study on the potential effects of human disturbances such as habitat fragmentation in tropical cloud forest. Our results will be useful for informing conservation planning to minimize impacts of human activity in a region with high biodiversity

Hypercoagulability in Cushing's syndrome: the role of specific haemostatic and fibrinolytic markers

OBJECTIVE: Hypercoagulability is a commonly described complication in patients with Cushing's syndrome. Recent clinical studies have indicated various abnormalities of coagulation and fibrinolysis parameters which may be related to that phenomenon. The aim of this study was to investigate the mechanisms underlying the hypercoagulable state in patients with Cushing's syndrome. ----- RESEARCH METHODS AND PROCEDURES: A wide range of serum markers involved in the processes of blood coagulation and fibrinolysis was measured in a group of 33 patients with Cushing's syndrome and 31 healthy controls. No participant was taking medication which could influence the result or had known diseases, except hypertension and diabetes, which could affect blood coagulation or fibrinolysis parameters. ----- RESULTS: Patients with Cushing's syndrome had higher levels of clotting factors II (P = 0.003), V (P < 0.001), VIII (P < 0.001), IX (P < 0.001), XI (P < 0.001) and XII (P = 0.019), protein C (P < 0.001), protein S (P < 0.001), C1-inhibitor (P < 0.001) and plasminogen activator inhibitor-1 (PAI-1) (P = 0.004). The activity of fibrinolytic markers, plasminogen (P < 0.001), antithrombin (P < 0.001) and antithrombin antigen (P = 0.001) was also increased in the patient group. ----- CONCLUSION: The study has demonstrated hypercoagulability in patients with Cushing's syndrome manifest as increased prothrombotic activity and compensatory activation of the fibrinolytic system. We propose the introduction of thromboprophylaxis in the preoperative and early postoperative periods, combined with a close follow-up in order to prevent possible thromboembolic events in patients with Cushing's syndrome

Ventilation design conditions associated with airborne bacteria levels within the wound area during surgical procedures: a systematic review

Background Without confirmation of the ventilation design conditions (typology and airflow rate), the common practice of identifying unidirectional airflow (UDAF) systems as equivalent to ultra-clean air ventilation systems may be misleading, but also any claims about the ineffectiveness of UDAF systems should be doubted. The aim of this review was to assess and compare ventilation system design conditions for which ultra-clean air (mean <10 cfu/m3) within 50 cm from the wound has been reported. Six medical databases were systematically searched to identify and select studies reporting intraoperative airborne levels expressed as cfu/m3 close to the wound site, and ventilation system design conditions. Available data on confounding factors such as the number of persons present in the operating room, number of door openings, and clothing material were also included. Predictors for achieving mean airborne bacteria levels within <10 cfu/m3 were identified using a penalized multivariate logistic regression model. Twelve studies met the eligibility criteria and were included for analysis. UDAF systems considered had significantly higher air volume flows compared with turbulent ventilation (TV) systems considered. Ultra-clean environments were reported in all UDAF-ventilated (N = 7) rooms compared with four of 11 operating rooms equipped with TV. On multivariate analysis, the total number of air exchange rates (P=0.019; odds ratio (OR) 95% confidence interval (CI): 0.66–0.96) and type of clothing material (P=0.031; OR 95% CI: 0.01–0.71) were significantly associated with achieving mean levels of airborne bacteria <10 cfu/m3. High-volume UDAF systems complying with DIN 1946-4:2008 standards for the airflow rate and ceiling diffuser size unconditionally achieve ultra-clean air close to the wound site. In conclusion, the studied articles demonstrate that high-volume UDAF systems perform as ultra-clean air systems and are superior to TV systems in reducing airborne bacteria levels close to the wound site

Can multiphase CT scan distinguish between papillary renal cell carcinoma type 1 and type 2?

ObjectiveTo investigate the utility of multiphase computed tomography (CT) and percutaneous renal mass biopsy (PRMB) in differentiating between papillary renal cell carcinoma (pRCC)-Type 1 and -Type 2, as emerging data have suggested differential enhancement patterns in different renal tumor histologies.Material and methodsRetrospective analysis of 51 patients (23 pRCC-Type 1/28 pRCC-Type 2) who underwent multiphase CT followed by surgery from July 2011 to April 2016 was performed. Data were analyzed between subgroups based on histology. Multiphase CT was analyzed for tumor size, and attenuation [Hounsfield Units (HU)]. Change in HU (ΔHU) was calculated between noncontrast (NC), corticomedullary (CM), nephrographic (N), and delayed (D) phases. Subset analysis was carried out on patients who underwent PRMB prior to surgery.ResultsThere was no difference in median tumor size (pRCC-Type 1 2.8 vs. pRCC-Type 2 2.6 cm, p=0.832). In addition to tumor size being similar between groups, distribution of tumor stages between groups was also similar (p=0.651). Greater proportion of high-grade tumors (III/IV) was noted in pRCC-Type 2 (42.9% vs. 8.7%) (p=0.011). There was no difference in HU values for NC (p=0.961), CM (p=0.118), N (p=0.277), and D (p=0.256) phases, and in ΔHU between CM-NC (p=0.278), N-NC (p=0.316), and D-NC (p=0.103). Thirteen patients underwent percutaneous biopsy, 11 of whom had diagnostic samples. Examination of 10/11 (90.9%) samples accurately predicted correct histology, and of 6/11 (54.5%) samples correctly identified high-vs. low-grade histology.ConclusionOur findings suggest substantial overlap of CT findings, despite pRCC-Type 2 having greater proportion of high-grade tumors. Utility of CT is limited in the differentiation between pRCC subtypes. Patients with suggested pRCC on CT imaging being considered for a non-extirpative strategy should undergo PRMB for risk stratification

Can multiphase CT scan distinguish between papillary renal cell carcinoma type 1 and type 2?

ObjectiveTo investigate the utility of multiphase computed tomography (CT) and percutaneous renal mass biopsy (PRMB) in differentiating between papillary renal cell carcinoma (pRCC)-Type 1 and -Type 2, as emerging data have suggested differential enhancement patterns in different renal tumor histologies.Material and methodsRetrospective analysis of 51 patients (23 pRCC-Type 1/28 pRCC-Type 2) who underwent multiphase CT followed by surgery from July 2011 to April 2016 was performed. Data were analyzed between subgroups based on histology. Multiphase CT was analyzed for tumor size, and attenuation [Hounsfield Units (HU)]. Change in HU (ΔHU) was calculated between noncontrast (NC), corticomedullary (CM), nephrographic (N), and delayed (D) phases. Subset analysis was carried out on patients who underwent PRMB prior to surgery.ResultsThere was no difference in median tumor size (pRCC-Type 1 2.8 vs. pRCC-Type 2 2.6 cm, p=0.832). In addition to tumor size being similar between groups, distribution of tumor stages between groups was also similar (p=0.651). Greater proportion of high-grade tumors (III/IV) was noted in pRCC-Type 2 (42.9% vs. 8.7%) (p=0.011). There was no difference in HU values for NC (p=0.961), CM (p=0.118), N (p=0.277), and D (p=0.256) phases, and in ΔHU between CM-NC (p=0.278), N-NC (p=0.316), and D-NC (p=0.103). Thirteen patients underwent percutaneous biopsy, 11 of whom had diagnostic samples. Examination of 10/11 (90.9%) samples accurately predicted correct histology, and of 6/11 (54.5%) samples correctly identified high-vs. low-grade histology.ConclusionOur findings suggest substantial overlap of CT findings, despite pRCC-Type 2 having greater proportion of high-grade tumors. Utility of CT is limited in the differentiation between pRCC subtypes. Patients with suggested pRCC on CT imaging being considered for a non-extirpative strategy should undergo PRMB for risk stratification

Health-related quality of life and fatigue in patients with adrenal incidentaloma

The objective of the present study was to examine several dimensions of quality of life (QoL) and fatigue in patients with adrenal incidentaloma. This was a case-control study designed to analyze patient outcomes using three validated generic QoL questionnaires, EQ-5D, SF-36, and MFI-20, the results of which were compared to those obtained for age- and sex-matched controls. The study population comprised 139 consecutive patients with nonfunctioning adrenal masses (104 females, 35 males; age 59.1 ± 10.8) and 139 age- and sex-matched controls. Reduced QoL was found in patients with adrenal incidentaloma as compared to controls. Dimensions of QoL that were notably affected included mobility (P = 0.03), performance of usual activities (P = 0.002), and anxiety/depression (P = 0.04) as evaluated using the EQ-5D; physical functioning (P < 0.001), physical role (P < 0.001), general health (P < 0.001), vitality (P = 0.001), social functioning (P = 0.001), and emotional role (P < 0.001) as evaluated using the SF-36; and physical fatigue (P = 0.04) as assessed using the MFI-20 questionnaire. In addition, perceived health on a visual analogue scale was also significantly lower in patients than in controls (64.8 ± 19.2 vs. 77.1 ± 15.1; P < 0.001). Patients with adrenal incidentaloma reported reduced QoL and a higher level of physical fatigue compared to age- and sex-matched controls. This subject will benefit from further studies comparing QoL outcomes of laparoscopic adrenalectomy versus no treatment in patients with adrenal incidentaloma