from Community-Centered Education Improves Vaccination Rates in Children From Low-Income Households By pediatrics.aappublications.org Published On :: 2013-07-08T00:07:26-07:00 Obstacles to vaccine delivery, including poverty, reduced access to medical care, and incomplete understanding of vaccine safety and importance, result in suboptimal coverage rates in some populations, allowing for disease outbreaks. Multicomponent interventions are successful in increasing immunization coverage rates.We show that collaboration with local resources, including the county health department and a large community-based organization, effectively increases immunization coverage rates in low-income, resource-poor children. (Read the full article) Full Article
from Results From the New Jersey Statewide Critical Congenital Heart Defects Screening Program By pediatrics.aappublications.org Published On :: 2013-07-15T00:07:09-07:00 Prenatal diagnosis and clinical examination do not identify all infants with critical congenital heart defects before hospital discharge. To improve early critical congenital heart defect detection, New Jersey was the first state to implement legislatively mandated newborn pulse oximetry screening.This report is the first to evaluate statewide pulse oximetry screening implementation. New Jersey had a high statewide screening rate and identified 3 infants with previously unsuspected critical congenital heart defects that otherwise might have resulted in significant morbidity and mortality. (Read the full article) Full Article
from Obstetric and Neonatal Care Practices for Infants 501 to 1500 g From 2000 to 2009 By pediatrics.aappublications.org Published On :: 2013-07-15T00:07:09-07:00 Among infants with birth weights of 501 to 1500 g born between 2000 and 2009, mortality and major morbidities among survivors declined.Obstetrical and neonatal care practices for infants 501 to 1500 g changed significantly from 2000 and 2009, particularly decreased conventional ventilation and use of steroids for chronic lung disease and increased nasal continuous positive airway pressure and surfactant treatment after delivery. (Read the full article) Full Article
from Estimating Overweight Risk in Childhood From Predictors During Infancy By pediatrics.aappublications.org Published On :: 2013-07-15T00:07:10-07:00 Several risk factors for both overweight and obesity in childhood are identifiable during infancy.A simple risk algorithm can be used to quantify risk of overweight in children. It can be used to help identify at-risk infants in a clinical setting to facilitate targeted intervention. (Read the full article) Full Article
from Remission and Persistence of Asthma Followed From 7 to 19 Years of Age By pediatrics.aappublications.org Published On :: 2013-07-29T00:07:10-07:00 The natural history of asthma during adolescence is dynamic because both remission and relapse are common. Remission has consistently been associated with mild asthma and the absence of sensitization.One in 5 children with asthma remitted from age 7 to 19. Remission was defined as no wheezing and no medication for ≥3 years and was inversely related to female gender, sensitization to furred animals, and asthma severity at baseline. (Read the full article) Full Article
from Rotavirus Vaccination of Very Low Birth Weight Infants at Discharge From the NICU By pediatrics.aappublications.org Published On :: 2013-08-12T00:07:18-07:00 Preterm and low birth weight infants are at increased risk of hospitalization due to rotavirus gastroenteritis, and rotavirus vaccine is immunogenic and well tolerated among these infants when provided at or after discharge from the NICU.Many preterm infants with a birth weight of ≤1500 g are not eligible to receive rotavirus vaccination because they remain in the NICU beyond the upper age limit recommended for immunization. New strategies are needed. (Read the full article) Full Article
from Pneumococcal Meningitis in Children: Epidemiology, Serotypes, and Outcomes From 1997-2010 in Utah By pediatrics.aappublications.org Published On :: 2013-08-26T00:07:47-07:00 The incidence of pediatric pneumococcal meningitis has declined after introduction of the 7-valent pneumococcal conjugate vaccine (PCV7). It is unknown whether the frequency of severe neurologic sequelae and adverse outcomes has changed in the era of widespread PCV7 use.Pneumococcal meningitis continues to be associated with substantial mortality and long-term morbidity. Sixty-three percent of survivors had neurologic sequelae. More than one-half of the children who were eligible for PCV7 were unimmunized at the time that they developed pneumococcal meningitis. (Read the full article) Full Article
from Health Outcomes Associated With Transition From Pediatric to Adult Cystic Fibrosis Care By pediatrics.aappublications.org Published On :: 2013-10-21T00:07:32-07:00 Transition from pediatric to adult care is often reported to be unsuccessful. Little evidential research has examined the actual proportion of youth in pediatric versus adult care or impact on health status outcomes after transferring from pediatric to adult care.Our article extends the literature by providing health transition outcome data, something that has been recognized as a critical gap to developing evidence-based programming and health care transition policy. (Read the full article) Full Article
from Pediatricians' Involvement in Community Child Health From 2004 to 2010 By pediatrics.aappublications.org Published On :: 2013-11-18T00:06:43-08:00 Although community engagement is considered an important professional role of physicians, there has been declining involvement of pediatricians in community child health activities. Whether enhanced training is associated with increased involvement is unclear.This study reveals a continued decline in pediatricians’ involvement in community child health activities and is the first national study to identify a link between formal training and pediatricians’ community involvement. (Read the full article) Full Article
from Emergency Department Visits Resulting From Intentional Injury In and Out of School By pediatrics.aappublications.org Published On :: 2014-01-13T00:06:59-08:00 Injuries sustained by children in the school setting have a significant public health impact. A concerning subgroup of school injuries are due to intentional and violent etiologies. Several studies have identified a need for further research to understand intentional school-based injuries.This study discusses national estimates and trends over time and risk factors of intentional injury–related emergency department visits due to injuries sustained in the school setting. (Read the full article) Full Article
from In-School Neurofeedback Training for ADHD: Sustained Improvements From a Randomized Control Trial By pediatrics.aappublications.org Published On :: 2014-02-17T00:07:20-08:00 An estimated 9.5% of children are diagnosed with attention-deficit/hyperactivity disorder (ADHD), which affects academic and social outcomes. We previously found significant improvements in ADHD symptoms immediately after neurofeedback training at school.This randomized controlled trial included a large sample of elementary school students with ADHD who received in-school computer attention training with neurofeedback or cognitive training. Students who received neurofeedback were reported to have fewer ADHD symptoms 6 months after the intervention. (Read the full article) Full Article
from Vaccine Financing From the Perspective of Primary Care Physicians By pediatrics.aappublications.org Published On :: 2014-02-24T00:07:07-08:00 Because of high costs of newer vaccines, financial risk to private vaccination providers has increased. Previous studies have shown general dissatisfaction with payment for the cost of vaccines and administration fees, with some providers considering no longer providing childhood vaccines.We show that many providers are dissatisfied with payment for vaccine purchase and administration from all types of payers and that, for new vaccines, providers are using a variety of strategies with parents to handle uncertainty about insurance coverage. (Read the full article) Full Article
from Television Viewing, Bedroom Television, and Sleep Duration From Infancy to Mid-Childhood By pediatrics.aappublications.org Published On :: 2014-04-14T00:07:33-07:00 Inadequate sleep in childhood is associated with poor mental and physical health. Numerous cross-sectional studies reveal associations between television viewing and the presence of a bedroom TV and inadequate sleep in older children and adolescents, but longitudinal research is limited.More TV viewing, and, among racial/ethnic minority children, bedroom TV, were associated with shorter sleep from infancy to midchildhood. These results raise the possibility that interventions to reduce TV could improve children’s sleep. (Read the full article) Full Article
from Emergency Department and Urgent Care for Children Excluded From Child Care By pediatrics.aappublications.org Published On :: 2014-06-23T00:07:23-07:00 Previous studies have revealed that children in child care are frequently ill with mild illness and are unnecessarily excluded from child care at high rates.Parent race/ethnicity, single parents, and work-related concerns are associated with increased emergent/urgent care use for a sick child excluded from child care, even for mild illnesses. (Read the full article) Full Article
from Age at Referral and Mortality From Critical Congenital Heart Disease By pediatrics.aappublications.org Published On :: 2014-06-30T00:06:30-07:00 Early referral of infants with critical congenital heart disease (CCHD) is recommended to reduce mortality. However, few population-based data have been published showing the relationship between CCHD neonatal mortality and timing of cardiac evaluation at a specialty center.In neonates with CCHD, 35% were not evaluated at a cardiac center by 4 days of age. These cases accounted for a significant number of CCHD deaths. This information enhances the rationale for pulse oximetry screening of neonates for CCHD. (Read the full article) Full Article
from Gestational Age and Risk of Venous Thromboembolism From Birth Through Young Adulthood By pediatrics.aappublications.org Published On :: 2014-07-28T00:07:15-07:00 Preterm birth has been associated with increased risk of venous thromboembolism (VTE) in infancy, but the longer-term risk is unknown.In a large national cohort, low gestational age at birth was associated with increased risk of VTE in infancy, early childhood, and young adulthood. These findings call for better awareness of the long-term risk of VTE among preterm birth survivors. (Read the full article) Full Article
from Health Care Provider Advice for Adolescent Tobacco Use: Results From the 2011 National Youth Tobacco Survey By pediatrics.aappublications.org Published On :: 2014-08-18T00:07:04-07:00 Cigarette smoking during adolescence causes significant health problems. Health care providers play an important role in promoting tobacco use abstinence among adolescents, but recent data on the prevalence of provider screening and advice to adolescents are lacking.This study uses nationally representative surveillance data to provide current estimates of self-reported receipt of health professional screening and advice about tobacco use among US adolescents. Cessation behaviors and correlates of past-year quit attempts among smokers were also explored. (Read the full article) Full Article
from Dating Violence, Childhood Maltreatment, and BMI From Adolescence to Young Adulthood By pediatrics.aappublications.org Published On :: 2014-09-08T00:06:24-07:00 Partner violence victimization is associated with mental and behavioral health effects linked to weight gain. Childhood maltreatment is directly linked to obesity and associated with neuroanatomic and psychosocial changes, which heighten vulnerability to subsequent stressors.This study finds that dating violence victimization is associated with greater increases in BMI from adolescence to young adulthood among women. Women with previous exposure to childhood sexual abuse are especially vulnerable to dating violence–related increases in BMI. (Read the full article) Full Article
from Prenatal and Newborn Screening for Critical Congenital Heart Disease: Findings From a Nursery By pediatrics.aappublications.org Published On :: 2014-10-06T00:06:22-07:00 The detection of critical congenital heart disease by fetal echocardiography or neonatal physical examination can have limitations. The addition of pulse oximetry screening in the newborn nursery increases the rate of diagnosis of these conditions before hospital discharge.In a tertiary-care center with comprehensive fetal echocardiography, nearly all newborns with critical congenital heart disease are diagnosed prenatally. Pulse oximetry will identify more infants from settings with lower prenatal detection. Improving access to and training in fetal echocardiography should also improve detection of these conditions. (Read the full article) Full Article
from Health Outcomes in Young Adults From Foster Care and Economically Diverse Backgrounds By pediatrics.aappublications.org Published On :: 2014-11-03T00:06:28-08:00 Youth in foster care are at higher risk of health problems at entrance and during their stays in care. Little is known about this group’s risk of health problems in young adulthood, in comparison with other populations of young adults.This is the first prospective study to our knowledge demonstrating that former foster youth are at higher risk of chronic health problems than economically secure and insecure general population young adults. (Read the full article) Full Article
from Pediatric Germ Cell Tumors From 1987 to 2011: Incidence Rates, Time Trends, and Survival By pediatrics.aappublications.org Published On :: 2014-12-08T00:06:37-08:00 Germ cell tumors in children are heterogeneous and rare neoplasms that occur in various locations, such as gonads, the central nervous system, and the pelvis. The incidence rate has been increasing in some countries.Population-based analyses of germ cell tumors in children are rare. This population-based study describes the incidence rates, trends, and survival of germ cell tumors in German children from 1987 to 2011. (Read the full article) Full Article
from Energy and Nutrient Intake From Pizza in the United States By pediatrics.aappublications.org Published On :: 2015-01-19T00:05:33-08:00 Among all age groups, children aged 6 to 11 years and adolescents aged 12 to 19 are the most frequent consumers of pizza. Pizza consumption is the second highest source of daily energy among children 2 to 18 years old.This study examines changes in children’s patterns of pizza consumption by demographic characteristics, source, and meal occasion. Using an individual-level fixed effects model, we examined the impact of pizza consumption on excess energy intake and diet quality. (Read the full article) Full Article
from Headache in Traumatic Brain Injuries From Blunt Head Trauma By pediatrics.aappublications.org Published On :: 2015-02-02T00:05:28-08:00 Although headache is a common symptom after minor blunt head trauma in children, controversy exists whether the presence of headache increases the risk of traumatic brain injury.Clinically important traumatic brain injuries are rare, and traumatic brain injuries on computed tomography are very uncommon in children with minor blunt head trauma when headaches are their only sign or symptom. (Read the full article) Full Article
from Recovery From Central Nervous System Acute Demyelination in Children By pediatrics.aappublications.org Published On :: 2015-06-01T06:07:55-07:00 Most prospective cohort studies of acquired demyelinating syndromes in children have focused on the genetic, environmental, and neuroimaging predictors of multiple sclerosis. Less is known regarding the severity of the incident demyelinating event and predictors of residual attack–related physical disability.In a national, prospective longitudinal study, incident acquired demyelinating syndromes in children were characterized in terms of physical deficits and acuity at onset, and recovery over the first 12 months. Follow-up evaluations up to 10 years’ postonset were analyzed. (Read the full article) Full Article
from Predicting Discharge Dates From the NICU Using Progress Note Data By pediatrics.aappublications.org Published On :: 2015-07-27T00:08:18-07:00 Discharge from the NICU requires coordination and may be delayed for nonmedical reasons. Predicting when patients will be medically ready for discharge can avoid these delays and result in cost savings for the hospital.We developed a supervised machine learning approach using real-time patient data from the daily neonatology progress note to predict when patients will be medically ready for discharge. (Read the full article) Full Article
from A Model for Predicting Significant Hyperbilirubinemia in Neonates From China By pediatrics.aappublications.org Published On :: 2015-09-21T00:07:35-07:00 Guidelines for postdischarge monitoring of hyperbilirubinemia for neonates of white descent are available from the American Academy of Pediatrics; however, such information for healthy term and late preterm Chinese neonates is lacking.A classification model for predicting the risk of significant hyperbilirubinemia in Chinese neonates was developed that combines a transcutaneous bilirubin–based nomogram with clinical risk factors. It classified newborns into 6 risk groups, which can guide clinicians in planning appropriate follow-up strategies. (Read the full article) Full Article
from Stigma and Parenting Children Conceived From Sexual Violence By pediatrics.aappublications.org Published On :: 2015-10-05T00:07:44-07:00 Maternal–child relationships among women raising children from sexual violence-related pregnancies (SVRPs) are not well understood. Limited case reports suggest widely varied and complex relationships. The determinants of these relationships are unknown.With its large sample size, this article quantifies and analyzes maternal–child relationships among women raising children from SVRPs, and assesses the impact of stigma, acceptance, and maternal mental health on these relationships. (Read the full article) Full Article
from From the NFL to MIT: How John Urschel Is Making Math More Interesting By feedproxy.google.com Published On :: Wed, 11 Apr 2018 00:00:00 +0000 Teachers must reject the idea that math is like eating vegetables, says former offensive lineman and current mathematician John Urschel. Full Article Mathematics
from How to Help Students Heal From 'Math Trauma' By feedproxy.google.com Published On :: Tue, 06 Nov 2018 00:00:00 +0000 Timed tests and "drill-and-kill" approaches to math education can leave students with long-lasting anxiety, writes researcher Jennifer Ruef. There's a better way to teach the subject. Full Article Mathematics
from Math Teachers Take a Page From English/Language Arts: Comic Books! By feedproxy.google.com Published On :: Tue, 24 Sep 2019 00:00:00 +0000 Comic books and graphic novels, popular in many language arts and social studies classes, are just now tiptoeing into the world of K-12 math. Full Article Mathematics
from Fin24.com | EXPLAINER: Can I claim tax deductions because I'm working from home? By www.fin24.com Published On :: Sat, 04 Apr 2020 11:08:37 +0200 Due to the spreading coronavirus pandemic and compounded by the lockdown, more South Africans have chosen to or have been forced to work from home. Full Article
from First nursing cohorts graduate from new Penn College at Wellsboro facility By news.psu.edu Published On :: Mon, 02 Mar 2020 11:59 -0500 Twenty-two students recently graduated from Penn College at Wellsboro’s practical nursing program, the first to fulfill their requirements at a facility dedicated in May. Full Article
from 100,000 Undocumented Students Graduate From U.S. High Schools Each Year, Analysis Finds By feedproxy.google.com Published On :: Wed, 24 Apr 2019 00:00:00 +0000 The new analysis significantly increases the annual estimate of undocumented high school students earning diplomas that has long been used in debates about immigration and special protections for immigrant youth who were illegally brought to the U.S. as children. Full Article Immigrants
from Burundi’s Peace Process, The Road from Arusha By feedproxy.google.com Published On :: Sun, 19 Jul 1998 22:00:00 GMT Full Article
from From Kabila to Kabila: Prospects for Peace in the Congo By feedproxy.google.com Published On :: Thu, 15 Mar 2001 23:00:00 GMT Full Article
from Pulling Back from the Brink in the Congo By feedproxy.google.com Published On :: Tue, 06 Jul 2004 22:00:00 GMT Full Article
from Securing Congo’s Elections: Lessons from the Kinshasa Showdown By feedproxy.google.com Published On :: Sun, 01 Oct 2006 22:00:00 GMT Full Article
from Chad: Escaping from the Oil Trap By feedproxy.google.com Published On :: Tue, 25 Aug 2009 22:00:00 GMT Full Article
from Burundi: From Electoral Boycott to Political Impasse By feedproxy.google.com Published On :: Mon, 07 Feb 2011 10:13:00 GMT Burundi risks reversing the decade of progress it has enjoyed since its civil war ended unless the government resumes political dialogue with the opposition. Full Article
from The Libyan crisis as seen from N’Djamena By feedproxy.google.com Published On :: Tue, 07 Jun 2011 22:00:00 GMT Of the three political upheavals that have hit the Maghreb since the beginning of 2011, the Libyan crisis seems to be the most dangerous. First of all for Libya, because the popular uprising has taken the form of an armed rebellion that has cut the country in two; second, for the West, now that NATO, under the cover of United Nations Resolution 1973 (2011) and in order to protect the civilian population, has entered the conflict on the side of the rebels, rashly gambling on a speedy war; and finally, for the region as a whole, because the conflict recently "overflowed" into Tunisia, and neighbouring countries are beginning to feel its humanitarian consequences. Full Article
from Congo: The Electoral Process Seen from the East By feedproxy.google.com Published On :: Sun, 04 Sep 2011 22:00:00 GMT The technical preparations for the presidential and legislative elections scheduled on 28 November and the beginning of the electoral campaign in the East of Congo have generated suspicion that risks developing into a crisis of confidence in the whole electoral process. Full Article
from The Central African Crisis: From Predation to Stabilisation By feedproxy.google.com Published On :: Tue, 17 Jun 2014 12:43:00 GMT To stabilise the Central African Republic (CAR), the transitional government and its international partners need to prioritise, alongside security, action to fight corruption and trafficking of natural resources, as well as revive the economy. Full Article
from Panel Finds Few Learning Gains From Testing Movement By feedproxy.google.com Published On :: Thu, 26 May 2011 00:00:00 +0000 A 10-year study by a blue-ribbon panel of scientists concludes that high-stakes testing and other accountability measures have largely failed to translate to real improvements in student achievement. Full Article Assessment+Accountability+Achievement
from Which States Expect the Most or Least From Students? By feedproxy.google.com Published On :: Tue, 22 May 2018 00:00:00 +0000 Mostly, states are holding to a higher bar for student achievement than they did a decade ago. But Iowa, Texas, and Virginia continue to show large gaps between their state proficiency standards and NAEP's. Full Article Assessment+Accountability+Achievement
from Ceftobiprole Activity against Bacteria from Skin and Skin Structure Infections in the United States from 2016 through 2018 [Susceptibility] By aac.asm.org Published On :: 2020-03-16T08:17:36-07:00 Ceftobiprole medocaril is an advanced-generation cephalosporin prodrug that has qualified infectious disease product status granted by the US-FDA and is currently being evaluated in phase 3 clinical trials in patients with acute bacterial skin and skin structure infections (ABSSSIs) and in patients with Staphylococcus aureus bacteremia. In this study, the activity of ceftobiprole and comparators was evaluated against more than 7,300 clinical isolates collected in the United States from 2016 through 2018 from patients with skin and skin structure infections. The major species/pathogen groups were S. aureus (53%), Enterobacterales (23%), Pseudomonas aeruginosa (7%), β-hemolytic streptococci (6%), Enterococcus spp. (4%), and coagulase-negative staphylococci (2%). Ceftobiprole was highly active against S. aureus (MIC50/90, 0.5/1 mg/L; 99.7% susceptible by EUCAST criteria; 42% methicillin-resistant S. aureus [lsqb]MRSA[rsqb]). Ceftobiprole also exhibited potent activity against other Gram-positive cocci. The overall susceptibility of Enterobacterales to ceftobiprole was 84.8% (>99.0% susceptible for isolate subsets that exhibited a non-extended-spectrum β-lactamase [lsqb]ESBL[rsqb]-phenotype). A total of 74.4% of P. aeruginosa, 100% of β-hemolytic streptococci and coagulase-negative staphylococci, and 99.6% of Enterococcus faecalis isolates were inhibited by ceftobiprole at ≤4 mg/L. As expected, ceftobiprole was largely inactive against Enterobacterales that contained ESBL genes and Enterococcus faecium. Overall, ceftobiprole was highly active against most clinical isolates from the major Gram-positive and Gram-negative skin and skin structure pathogen groups collected at U.S. medical centers participating in the SENTRY Antimicrobial Surveillance Program during 2016–2018. The broad-spectrum activity of ceftobiprole, including potent activity against MRSA, supports its further evaluation for the potential ABSSSI indication. Full Article
from Transferable Resistance Gene optrA in Enterococcus faecalis from Swine in Brazil [Mechanisms of Resistance] By aac.asm.org Published On :: 2020-04-06T08:49:25-07:00 OptrA is an ATP-binding cassette (ABC)-F protein that confers resistance to oxazolidinones and phenicols, and can be either plasmid or chromosomally encoded. We isolated 13 Enterococcus faecalis strains possessing linezolid MIC ≥ 4 mg/L from nursery pigs in swine herds located across Brazil. Genome sequence comparison showed that these strains possess optrA in different genetic contexts occurring in 5 different E. faecalis sequence type backgrounds. The optrA gene invariably occurred in association with an araC regulator and a gene encoding a hypothetical protein. In some contexts, this genetic island was able to excise and form a covalently closed circle within the cell which appeared to occur in high abundance, and to be transmissible by co-resident plasmids. Full Article
from Novel peptide from commensal Staphylococcus simulans blocks MRSA quorum sensing and protects host skin from damage [Mechanisms of Action] By aac.asm.org Published On :: 2020-04-06T08:49:25-07:00 Recent studies highlight the abundance of commensal coagulase-negative staphylococci (CoNS) on healthy skin. Evidence suggests that CoNS actively shape the skin immunological and microbial milieu to resist colonization or infection by opportunistic pathogens, including methicillin resistant Staphylococcus aureus (MRSA), in a variety of mechanisms collectively termed colonization resistance. One potential colonization resistance mechanism is the application of quorum sensing, also called the Accessory Gene Regulator (agr) system, which is ubiquitous among staphylococci. Common and rare CoNS make autoinducing peptides (AIPs) that function as MRSA agr inhibitors, protecting the host from invasive infection. In a screen of CoNS spent media we found that Staphylococcus simulans, a rare human skin colonizer and frequent livestock colonizer, released potent inhibitors of all classes of MRSA agr signaling. We identified three S. simulans agr classes, and have shown intraspecies cross-talk between non-cognate S. simulans agr types for the first time. The S. simulans AIP-I structure was confirmed, and the novel AIP-II and AIP-III structures were solved via mass spectrometry. Synthetic S. simulans AIPs inhibited MRSA agr signaling with nanomolar potency. S. simulans in competition with MRSA reduced dermonecrotic and epicutaneous skin injury in murine models. Addition of synthetic AIP-I also effectively reduced MRSA dermonecrosis and epicutaneous skin injury in murine models. These results demonstrate potent anti-MRSA quorum sensing inhibition by a rare human skin commensal, and suggest that cross-talk between CoNS and MRSA may be important in maintaining healthy skin homeostasis and preventing MRSA skin damage during colonization or acute infection. Full Article
from Structural recognition of spectinomycin by resistance enzyme ANT(9) from Enterococcus faecalis [Mechanisms of Resistance] By aac.asm.org Published On :: 2020-04-06T08:49:25-07:00 Spectinomycin is a ribosome-binding antibiotic that blocks the translocation step of translation. A prevalent resistance mechanism is the modification of the drug by aminoglycoside nucleotidyl transferase (ANT) enzymes of the spectinomycin-specific ANT (9) family or by the dual-specificity ANT(3") (9) family that also acts on streptomycin. We previously reported the structural mechanism of streptomycin modification by the ANT(3") (9) AadA from Salmonella enterica. ANT (9) from Enterococcus faecalis adenylates the 9-hydroxyl of spectinomycin. We here present the first structures of spectinomycin bound to an ANT enzyme. Structures were solved for ANT (9) in apo form, in complex with ATP, spectinomycin and magnesium or in complex with only spectinomycin. ANT (9) shows similar overall structure as AadA with an N-terminal nucleotidyltransferase domain and a C-terminal α-helical domain. Spectinomycin binds close to the entrance of the interdomain cleft, while ATP is buried at the bottom. Upon drug binding, the C-terminal domain rotates by 14 degrees to close the cleft, allowing contacts of both domains with the drug. Comparison with AadA shows that spectinomycin specificity is explained by a straight α5 helix and a shorter α5-α6 loop that would clash with the larger streptomycin substrate. In the active site, we observe two magnesium ions, one of them in a previously un-observed position that may activate the 9-hydroxyl for deprotonation by the catalytic base Glu-86. The observed binding mode for spectinomycin suggests that also spectinamides and aminomethyl spectinomycins, recent spectinomycin analogues with expansions in position 4 of the C ring, will be subjected to modification by ANT (9) and ANT(3") (9) enzymes. Full Article
from Epidemiological study on prevalence, serovar diversity, multi-drug resistance and CTX-M-type extended-spectrum {beta}-lactamases of Salmonella spp. from patients with diarrhea, food of animal origin, and pets in several provinces of China [Epidemiology an By aac.asm.org Published On :: 2020-04-20T08:36:46-07:00 A total of 2,283 Salmonella spp. isolates were recovered from 18,334 samples including patients with diarrhea, food of animal origin and pets across 5 provinces of China. The highest prevalence of Salmonella spp. was detected in chicken meats (39.3%, 486/1,237). Fifteen serogroups and 66 serovars were identified, with Typhimurium and Enteritidis being the most dominant. Most (85.5%, 1,952/2,283) isolates exhibited resistant to ≥ 1 antimicrobial and 56.4% were multi-drug resistant (MDR). A total of 222 isolates harbored extended-spectrum β-lactamases (ESBLs), 200 of which were CTX-M-type that were mostly detected from chicken meat and turtle fecal. Overall, eight blaCTX-M genes were identified, with blaCTX-M-65, blaCTX-M-123, blaCTX-M-14, blaCTX-M-79, and blaCTX-M-130 being the most prevalent. Totally, 166 of the 222 ESBL-producing isolates had amino acid substitutions in GyrA (S83Y, S83F, D87G, D87N, and D87Y) and ParC (and S80I), whilst the PMQR-encoding genes oqxA/B, qepA, and qnrB/S were detected in almost all isolates. Of the fifteen sequence types (STs) identified in the 222 ESBLs, ST17, ST11, ST34, and ST26 ranked among the top 5 in the number of isolates. Our study revealed considerable serovars diversity, high prevalence of co-occurrence of MDR determinants, including CTX-M-type ESBLs, QRDRs mutations and PMQR genes. This is the first report of CTX-M-130 Salmonella spp. from patients with diarrhea and QRDRs mutations from turtle fecal samples. Our study emphasizes the importance of actions, both in the health care settings and in the veterinary medicine sector, to control the dissemination of MDR, especially the CTX-M Salmonella spp. isolates. Full Article
from Identification of antiviral drug candidates against SARS-CoV-2 from FDA-approved drugs [Antiviral Agents] By aac.asm.org Published On :: 2020-05-04T08:49:24-07:00 Drug repositioning is the only feasible option to address the COVID-19 global challenge immediately. We screened a panel of 48 FDA-approved drugs against SARS-CoV-2 which were pre-selected by an assay of SARS-CoV and identified 24 potential antiviral drug candidates against SARS-CoV-2 infection. Some drug candidates showed very low micromolar IC50s and in particular, two FDA-approved drugs - niclosamide and ciclesonide – were notable in some respects. Full Article