Empyema thoracic in a neonate co-infected with SARS-CoV-2 and staphylococcus arouse successfully treated with fibrinolysis: a brief report.

BACKGROUND: Empyema as a rare cause of respiratory distress in neonatal period has not yet been reported after Corona virus disease 2019 (COVID-19) and even rarely in the context of bacterial infections is age group. CASE PRESENTATION: The first neonate of quadruplets, resulting from Cesarean-Section of a 30-year-old mother without a history of previous illness, born at 34 weeks of gestation with a birth weight of 1600 gram. All four newborns were hospitalized; while the first one underwent nasal continuous positive airway pressure (N-CPAP) with a positive end-expiratory pressure of 6 and fractional inspired oxygen of 0.6, due to respiratory distress, noting a respiratory score of five out of 12.She was resuscitated one hour later due to bradycardia and underwent ventilator support. She received a single dose of pulmonary surfactant, intravenous paracetamol, and phenobarbital due to respiratory distress syndrome, Pectus Ductus Arteriosus, and unilateral clonic movements, respectively. In the lack of positive blood culture, she extubated two days later and breast-feeding was started. On day eight, she underwent high flow nasal cannula. On day 12, she suddenly developed respiratory distress, mottling, and abdominal distension, leading to N-CPAP and re-evaluation. The nasopharyngeal sampling for severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) real time Polymerase chain reaction and the blood culture for staphylococcus aurous became positive. A large volume pleural effusion including septa and loculation in right hemi-thorax on chest computerized tomography scan and ultrasound was seen, necessitating to thoracotomy, which was not possible due to her general condition. Remdesivir was started and antibiotics changed to a more broad-spectrum coverage. Chest tube was inserted and Alteplase was injected for three consecutive days with beneficial effects. She had no problem for six-month follow up. CONCLUSION: This was a case of empyema thoracic in the context of SARS-CoV-2 and Staphylococcus arouses co-infection. In our experience, it can be treated by chest drainage and fibrinolysis in neonatal period.

Shear Capacity of C-Shaped and L-Shaped Angle Shear Connectors.

This paper investigates the behaviour of C-shaped and L-shaped angle shear connectors embedded in solid concrete slabs. An effective finite element model is proposed to simulate the push out tests of these shear connectors that encompass nonlinear material behaviour, large displacement and damage plasticity. The finite element models are validated against test results. Parametric studies using this nonlinear model are performed to investigate the variations in concrete strength and connector dimensions. The finite element analyses also confirm the test results that increasing the length of shear connector increases their shear strength proportionately. It is observed that the maximum stress in L-shaped angle connectors takes place in the weld attachment to the beam, whereas in the C-shaped angle connectors, it is in the attached leg. The location of maximum concrete compressive damage is rendered in each case. Finally, a new equation for prediction of the shear capacity of C-shaped angle connectors is proposed.

Distribution of Genes Encoding Resistance to Macrolides Among Staphylococci Isolated From the Nasal Cavity of Hospital Employees in Khorramabad, Iran.

BACKGROUND: Epidemiological data on antibiotic susceptibility of Staphylococcus strains isolated from nasal carriers in each region can be helpful to select appropriate drugs to eradicate carriage states, control nosocomial infections and also treat patients. OBJECTIVES: The current study aimed to investigate the antibiotic resistance profile and the molecular prevalence of the ermA, ermB, ermC and msrA genes among Staphylococcus strains isolated from the anterior nares of hospital employees. PATIENTS AND METHODS: In this cross-sectional study, a total of 100 Staphylococcus isolates, 51 Staphylococcus aureus, 49 coagulase-negative staphylococci (CoNS) were isolated from the anterior nares of hospital employees in Khorramabad, Iran. Susceptibility pattern to macrolide antibiotics were determined using the disk diffusion method. The polymerase chain reaction (PCR) assay was applied to determine the major erythromycin-resistant genes (ermA, ermB, ermC and msrA). RESULTS: Fifty-three (53%) isolates were simultaneously resistant to erythromycin, azithromycin and clarithromycin (cross-resistance); while 8 (8%) isolates had variable macrolide susceptibility pattern. Among the S. aureus isolates, the difference in prevalence of resistance to erythromycin between males and females was significant (P = 0.011). The frequency of ermA, ermB, ermC, and msrA genes were 3%, 5%, 33% and 20%, respectively. It was also found that out of 53 isolates resistant to erythromycin, 44 (83%) isolates (eight S. aureus and thirty-six CoNS strains) carried at least one of the four tested genes. Eight (8%) isolates had intermediate phenotype to erythromycin, in which 4 (50%) isolates carried ermB or ermC genes. In addition, out of 39 erythromycin-susceptible isolates, 3 (7.7%) isolates were positive for ermB or ermC genes. CONCLUSIONS: No entire association was found between genotype and phenotype methods to detect macrolides-resistant isolates. In addition, distribution of genetically erythromycin-resistant isolates is geographically different among staphylococci. It is recommend removing S. aureus from nasal carriers by proved approaches such as local or systemic administration of effective antibiotics or bacterial interference.