Methicillin-Resistant Staphylococcus aureus Nasal Swab Is Insufficient to Withhold Empiric Methicillin-Resistant Staphylococcus aureus Pneumonia Coverage in a Trauma Population.

INTRODUCTION: Methicillin-resistant staphylococcus aureus (MRSA) nasal colonization is a predictor of MRSA pneumonia in intensive care unit (ICU) patients. Negative nasal swabs have shown up to a 97% negative predictive value for MRSA pneumonia in nontrauma populations, though little investigation has been pursued in trauma patients. MATERIALS AND METHODS: All trauma patients admitted to the ICU from April 2018 to February 2019 were screened for MRSA colonization by nasal swab. Patients with suspicion for pneumonia underwent bronchoalveolar lavage or quantitative sputum culture and were started on empiric antibiotic therapy based on the swab result. Swab-positive patients were started on empiric MRSA coverage and swab-negative patients were not. RESULTS: MRSA nasal swab screening was performed in 601 trauma ICU patients. Ninety-six patients subsequently underwent pneumonia workup and were started on an empiric antibiotic regimen based on nasal swab results. Seventeen (17.7%) patients were MRSA nasal swab positive on screening, and 22 (22.9%) patients subsequently had significant growth of MRSA on quantitative respiratory culture. The sensitivity of nasal swab was 50.0% and the specificity was 91.9%. Eleven patients had a negative MRSA nasal swab but a positive MRSA pneumonia (11.5%). Patients with inadequate antibiotic coverage had statistically longer hospital length of stay, ICU length of stay, ventilator days, and rates of unplanned intubation compared to patients with adequate antibiotic coverage. CONCLUSIONS: Nasal swab screening was not sensitive enough in a trauma population with a high endemic incidence of MRSA colonization to warrant withholding empiric antibiotic MRSA coverage in patients with suspected pneumonia.

A Qualitative Study on Palliative Needs of Stroke Patients in an Indian Tertiary Care Setting - Doctors' Perspective.

INTRODUCTION: Stroke is the development of a focal neurological disturbance lasting >24 h, of vascular origin. In India, stroke is one of the leading causes of morbidity and mortality. Most stroke patients, during their duration of treatment and posthospitalization, want relief of suffering, a sense of control and minimized burden on the family. AIM: The aim of this study is to describe treating doctors' perspectives on the palliative needs of stroke patients in India. METHODOLOGY: This qualitative study was conducted at a tertiary care hospital in South India. A total of 17 doctors involved in the care of stroke patients were interviewed, using an interview guide. The interviews were audio recorded simultaneously. The audio recording was transcribed verbatim, and the data were coded using a grounded theory approach. An inductive approach using thematic analysis was used to manually analyze the data. RESULTS: Eight themes emerged. (1) Functional disability: loss of independence due to immobility, speech deficits, visual disturbances, feeding difficulties, and incontinence cause immense distress. (2) Physical burden: pain in the form of central poststroke pain, periarthritic shoulder, psychogenic pain, and various sequela of chronic bed bound state like bed sores and pneumonia add to the burden. (3) Psychological needs: depression is common in stroke patients along with other psychological issues such as anxiety, agitation, apathetic state, and behavioral disturbances (4) Social issues: Cost of treatment of stroke patients coupled with their loss of employment leads to huge economic burden. They also face abandonment by children or spouse, in all sections of socioeconomic strata. (5) Caregiver burden: caregiver has a major role in a setting of stroke and in the long-term affects all domains of their lives, compromising their psychological and physical health. (6) Counseling-an unmet need: counseling is particularly important in a setting of stroke for the patient as well as the caregivers and results in a better patient outcome. However, clinicians expressed that it was inadequate due to the huge patient load, time constraints, and lack of effective counseling skills. (7) Spiritual needs: few clinicians stated that existential distress and spiritual struggle are seen in debilitated stroke victims and are often unaddressed. (8) Issues at the end of life care: patients with massive stroke, multiple comorbidities, and poor rehabilitative potential requires end of life care. CONCLUSIONS: From the interviews of the clinicians, we can conclude that care of a stroke patient is more than medical management and rehabilitation, as several other aspects of the patient's life are affected by the condition. The quality of life aspect has to be looked upon as an area that requires active intervention in a setting of stroke. Physical disabilities were viewed as the most significant factor in reducing the quality of life. Spiritual needs have a low priority in comparison to other physical needs. Due to high patient load and time constraints, many of the needs are unaddressed. Two important areas where palliative medicine has a major role in a setting of stroke are counseling and alleviating caregiver burden. However, referral of stroke patients to palliative medicine is low and further research to identify barriers to specialist palliative care of stroke patients will help in promoting the referrals to palliative medicine.

Mechanistic insights into SARS-CoV-2 spike protein induction of the chemokine CXCL10.

During a SARS-CoV-2 infection, macrophages recognize viral components resulting in cytokine production. While this response fuels virus elimination, overexpression of cytokines can lead to severe COVID-19. Previous studies suggest that the spike protein (S) of SARS-CoV-2 can elicit cytokine production via the transcription factor NF-κB and the toll-like receptors (TLRs). In this study, we found that: (i) S and the S2 subunit induce CXCL10, a chemokine implicated in severe COVID-19, gene expression by human macrophage cells (THP-1); (ii) a glycogen synthase kinase-3 inhibitor attenuates this induction; (iii) S and S2 do not activate NF-κB but do activate the transcription factor IRF; (iv) S and S2 do not require TLR2 to elicit CXCL10 production or activate IRF; and (v) S and S2 elicit CXCL10 production by peripheral blood mononuclear cells (PBMCs). We also discovered that the cellular response, or lack thereof, to S and S2 is a function of the recombinant S and S2 used. While such a finding raises the possibility of confounding LPS contamination, we offer evidence that potential contaminating LPS does not underly induced increases in CXCL10. Combined, these results provide insights into the complex immune response to SARS-CoV-2 and suggest possible therapeutic targets for severe COVID-19.

Development and validation of a 'universal' HPLC method for pyrethroid quantification in long-lasting insecticidal mosquito nets for malaria control and prevention.

OBJECTIVES: To outline the development and validation of a universal method for quantifying deltamethrin, permethrin and alpha-cypermethrin levels in a variety of long-lasting insecticidal mosquito nets. METHODS: Using the HPLC conditions found in the CIPAC method for deltamethrin quantification, the method is based on a simple extraction technique for sample preparation (heating in isooctane at approximately 100 °C for 15 min). The method was validated for linearity, specificity, accuracy, precision, insecticide stability to extraction conditions and required extraction time for insecticide removal. RESULTS: The method was found valid for insecticide quantifications for various types of nets, namely for deltamethrin coated on polyester nets, deltamethrin incorporated into polyethylene nets, permethrin incorporated into polyethylene nets, alpha-cypermethrin coated on polyester nets and alpha-cypermethrin incorporated into polyethylene nets. CONCLUSIONS: This method will provide a more simplified approach to testing a variety of nets (different types of fibre) containing deltamethrin, permethrin or alpha-cypermethrin.

Negative Sestamibi Scans Predict Lower Likelihood of Surgical Referral in Patients with Primary Hyperparathyroidism.

99mTechnetium sestamibi scans (MIBI) can provide negative or inaccurate results in patients with biochemical primary hyperparathyroidism. Reliance on MIBI as a diagnostic modality rather than as a localization tool leads to misdiagnosis and inappropriate care. The aim of this study was to determine the impact of negative MIBI scans on referral patterns and surgical intervention. Adults with MIBI scans at our institution from January 1, 2011, to May 31, 2017, were retrospectively reviewed. Data collected include demographics, study date and results, ordering physician specialty, pre/postoperative laboratories, and operative and final pathology. Statistical analysis was performed with SPSS v24 (IBM Corp., Armonk, NY). Three hundred fifty-seven patients had a MIBI scan; 10 were excluded for incomplete data or incorrect diagnosis. One hundred eighty-six were interpreted as positive (53.6%) and 161 were interpreted as negative (46.4%). Of the 186 positive MIBI scans, 135 (72.6%) were seen by an endocrine surgeon (ES). Of these 135 patients, 111 (82.2%) underwent parathyroidectomy. Of the 161 negative MIBI scans, 69 (42.9%) were seen by an ES. Of these, 53 (76.8%) underwent parathyroidectomy. In all, 90/92 (97.8%) with a negative MIBI scan who were not seen by an ES did not have surgery. Nonendocrine surgeon physicians are more likely to use MIBI scans as diagnostic tools to assist with clinical decision-making. Patients with a negative MIBI scan not seen by an ES were significantly less likely to undergo parathyroidectomy. Patients with primary hyperparathyroidism should be referred to an experienced parathyroid surgeon for evaluation, regardless of the MIBI result.