Evolution of Beta-Lactamases in Urinary Klebsiella pneumoniae Isolates from Croatia; from Extended-Spectrum Beta-Lactamases to Carbapenemases and Colistin Resistance.

K. pneumoniae isolates often harbor various antibiotic resistance determinants including extended-spectrum ß-lactamases (ESBLs), plasmid-mediated AmpC ß-lactamases (p-Amp-C) and carbapenemases. In this study we analyzed 65 K. pneumoniae isolates obtained from urinary tract infections in the outpatients setting, with regard to antibiotic susceptibility, ß-lactamase production, virulence traits and plasmid content.Antibiotic susceptibility was determined by broth microdilution method. PCR was applied to detect genes encoding ESBLs, p-Amp-C and carbapenemases and plasmid incompatibility groups. Phenotypic methods were applied to characterize virulence determinants. Increasing resistance trend was observed for amoxicillin/clavulanate, imipenem, meropenem and ciprofloxacin. The study showed that ESBLs belonging to the CTX-M family, conferring high level of resistance to expanded-spectrum cephalosporins (ESC) were the dominant resistance trait among early isolates (2013 to 2016) whereas OXA-48 carbapenemase, belonging to class D, emerged in significant numbers after 2017. OXA-48 producing organisms coharbored ESBLs. KPC-2 was dominant among isolates from Dubrovnik in the recent years. Colistin resistance was reported in three isolates. Inc L/M was the dominant plasmid in the later period, encoding OXA-48. Hyperviscosity was linked to KPC positivity and emerged in the later period. This report describes evolution of antibiotic resistance in K. pneumoniae from ESBLs to carbapenemases and colistin resistance. The study demonstrated the ability of K. pneumoniae to acquire various resistance determinants, over time. The striking diversity of the UTI isolates could result from introduction of the isolates from the hospitals, transfer of plasmids and multidirectional evolution.

Abdominal Wall Defect Reconstructed by Breast Flaps Using a Mercedes Closure Pattern.

BACKGROUND: Surgery of the abdominal cavity may lead to postoperative defects to the ventricular segment of the abdominal wall. The reconstruction of these defects, especially in the area of the median line, represents an issue during the course of healing due to the role of the abdominal cavity in respiratory processes. METHODS: Reconstructive surgical procedure was performed on an infected vast defect to the ventral segment of the abdominal wall in a 77-year-old woman by a modified "Mercedes closure pattern," i.e., by combining three fasciocutaneous flaps: bipedicle flap of the upper segment of the abdominal wall and two sliding breast flaps. RESULTS: Application of a modified complex Mercedes closure pattern was successful and positively affected the redistribution of pressure forces at the places where the edges of the wound were in contact. CONCLUSIONS: The applied and described technique of closing the abdominal cavity decreased the possibility of infection to the prosthetic material, because direct contact between the sutures and the prosthetic no longer existed. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Nursing Home as a Reservoir of Carbapenem-Resistant Acinetobacter baumannii.

Acinetobacter baumannii is an increasingly common pathogen in healthcare settings globally. It is frequently resistant to multiple antimicrobial agents and there are recent reports on strains that are pandrug resistant. The aim of the study was to characterize the mechanisms of carbapenem resistance of A. baumannii strains from a nursing home in Zagreb and to genotype the strains. Antimicrobial susceptibility testing was performed by the broth microdilution method according to the Clinical and Laboratory Standards Institute (CLSI). PCR was used to detect genes encoding carbapenemases of groups A, B, and D and extended-spectrum ß-lactamases. Genotyping of the strains was performed by rep-PCR. All strains were found to be resistant to ceftazidime, cefotaxime, ceftriaxone, cefepime, piperacillin/tazobactam, imipenem, meropenem, and ciprofloxacin. All, but one strain, were resistant to gentamicin. PCR revealed blaOXA-23 genes in 14, blaOXA-24 in 5, and blaVIM in 11 strains. All strains positive for blaVIM genes coharbored blaOXA-23 genes. The 14 strains with OXA-23 belonged to ICL II, whereas the 5 strains positive for blaOXA-24 belonged to ICL I. In contrast to hospitals where OXA-24/40-like ß-lactamases and OXA-58 were the most prevalent, OXA-23-like ß-lactamases are the dominant group in the nursing home. OXA-58-like ß-lactamase, which is the most widespread group, was not found. Acquisition of blaMBL genes in A. baumannii strains was observed. Rep-PCR identified two clones. Two strains A10 and A13 were alocated to a novel sequence type ST 637. Nursing homes can act as a source of dissemination of blaOXA and blaMBL genes in the environment and the possible influx to the hospital environment.

Anatomical Prediction for Surgical Positioning of the Umbilicus in a Croatian Population.

AIM: The umbilicus is an essential esthetic landmark on the abdominal wall in women and men. There are only few models published for predicting exact localization of the umbilicus. The aim of our study was to develop a mathematical model for predicting correct umbilical positioning in a sample of young women and men and in a sample of middle-aged women. In addition, we wanted to develop a predictive model applicable to both sexes. We applied our models with distinct anthropometric characteristics such as body mass index (BMI) and waist circumference (WC)/hip circumference (HC) to further expand our findings. METHODS: In this study, 98 Croatian women and men randomly selected from the University of Zagreb and 46 female patients awaiting abdominoplasty procedure at our institution were included. Anthropometric data and measurements between the umbilicus and fixed bony points around the anterior abdomen were collected. The data collected were body mass (BM), body height (BH), BMI, WC and HC, and waist-hip ratios (WHR). All collected data were subjected to standard statistical analyses. RESULTS: This study developed 2 different regressive equations for the most accurate prediction of exact umbilical localization. In women, the best prediction of the position of the umbilicus was based on the distance from the interanterior hypochondrium line to the umbilicus using the following regressive equation: u-i-hy = BM × 0.5799 + BH × -0.5051 + BMI × -1.8230 + WHR × -10.6364 + 89.6411. In men, the best prediction of the position of the umbilicus was based on the distance from the umbilicus to the interspinous line using the following regressive equation: u-i-is = age × 0.2033 + BM × 0.6445 + BH × -0.5692 + BMI × -2.2802 + WC × -0.0911 + 101.9408. METHODS: We found that age and anthropometric dimensions have a significant influence on the position of the umbilicus on the anterior abdominal wall. The naturally occurring anthropometric variations between women and men made the results of a unique predictive model for umbilical position inaccurate. We found that using 2 distinct predictive models, 1 for both subgroups of women and 1 for men, generated the most accurate predictive results. This quantitative tool should be applied to both women and men for the correct positioning of the umbilicus in reconstructive and esthetic procedures in which the original umbilical location is affected.

Possible target for preventing fibrotic scar formation following acute myocardial infarction.

Bone morphogenetic protein 1 (BMP1) was originally isolated from bone with other BMPs due to its affinity for heparin. While all other BMPs are members of the Transforming Growth Factor ß (TGFß) superfamily of growth factors, BMP1 is not an authentic member of the BMP protein family. Together with mammalian Tolloid Like protein 1 (mTLL-1) and mTLL-2, BMP1 comprise a small group of zinc- and calcium-dependent proteinases. Acute myocardial infarction (AMI) is the leading cause of death in developed countries which accounts for 13% of deaths worldwide. It was recently shown that inhibition of BMP1-3 reduces progression of fibrosis in chronic kidney disease and suggested that BMP1-3 is an important molecule for fibrogenesis. We hypothesize that inhibition of BMP1-3 represents future of therapeutic interventions in the heart tissue fibrosis following AMI. This novel approach aims to acquire the first candidate specific treatment for recuperating the heart function in patients with AMI.

Hair transplantation on a free microvascular latissimus dorsi flap: case report.

Large scalp defects can present as a challenging clinical problem for a reconstructive surgeon. We present a patient with a large scalp defect following an infection after neurosurgical treatment. Reconstruction of a defect was performed using a free latissimus dorsi flap with split-thickness skin graft. For achieving good aesthetic result, we transplanted 1000 minigrafts in 3 sessions on the latissimus dorsi flap. In our opinion, hair transplantation on a free microvascular flap is a viable and easy procedure with good aesthetic outcome for treating residual alopecia after reconstructing large scalp defects.

Neuroendocrine small cell carcinoma of the breast--a case report.

Neuroendocrine tumors are very rare tumors that occur most commonly in the gastrointestinal tract. The occurrence of neuroendocrine tumors outside gastrointestinal tract is very rare but not unknown. Thus, neuroendocrine tumors and their primary seat can be found in the bronchi and lungs, as well as in the testicles, ovaries, prostate, etc. The occurrence of neuroendocrine tumors as a primary seat in the breast is extremely rare phenomenon that is described in literature. We present the case of 55-year old female in where routine mammographic examination found suspicious lesions that we recommended for further processing. The patient made a breast ultrasound examination in which tumor formation was found in size 27 x 19 mm and cytological puncture found breast adenocarcinoma. Further pathohystologic and immunohistochemical analysis set the diagnosis of neuroendocrine carcinoma, small cell type, second grade. Tumor formation by ultrasound initially sized 27 x 19 mm and pathohistologic diagnosis showed tumor size 26 x 20 x 20 mm. The axillary lymph node biopsy did not found distant metastases in lymph nodes as well as gatherings in other organs. Neuroendocrine small cell carcinomas are exceedingly rare phenomena in the literature. By the year 2009 in the USA there were described only 50 cases of this extremely rare tumor of the breast.

Hernia of Morgagni--case report.

Morgagni's hernia is result of penetration of the abdominal contents into the chest through an anterior retrocostoxiphoid defect in the anterior midline of the diaphragm. It can be manifested with symptoms since birth as a bloated feeling, nausea and belching after meals. We present a patient with symptomatic herniation of the torqued antral part of stomach and loops of the transverse colon. In our case, chest and abdominal radiography after oral intake of contrast are used to diagnose this condition. Herniation was reduced surgically by a transabdominal approach. At the control examination one year after surgery in our patient all symptoms have disappeared, and was given 15 kg of body weight.

Serum HER2/ECD value in stage I and II early breast cancer: need of a lower cut-off?

BACKGROUND: HER2 overexpression is well-established risk factor of worse prognosis in metastatic and early breast cancer. HER2 positivity can be determined from tumor tissue by immunohistochemical staining or by fluorescent in situ hybridization, or from serum by measuring concentration of HER2 receptor extracellular domain (HER2/ECD). HER2/ECD correlates well with worse prognosis in metastatic and locally advanced (stage III) disease if serum concentration is >15 ng/ml, but there are no consistent data for patients with early breast cancer. METHODS AND RESULTS: 41 patients with stage I and II breast cancer and 52 healthy controls were included into the study. HER2/ECD was determined before surgery and correlated with HER2/neu overexpression, Ki67, hormone receptor status and disease stage, and compared with value in healthy controls. Mean serum HER2/ECD concentration in patients was 8.62 ng/ml and 5.78 ng/ml in controls, and the difference was statistically significant (p = 0.000061). The best diagnostic cut-off value was 7.7 ng/ml, with 76.92% sensitivity and 72.92% specificity. Positive predictive value of the test was 69.77% and negative predictive value was 79.55%, with 74.71% of patients correctly classified. Serum HER2/ECD correlated with hormone receptors status, and no correlation with histological overexpression has been observed. CONCLUSION. Serum HER2/ECD concentration of ≥7.7 ng/ml has possible diagnostic value in stage I and II breast cancer. It should not be used as a determinant of HER2 positivity. Prognostic significance of HER2/ECD in early breast cancer, its correlation with hormone receptor status, and interconnection between hormone receptors and HER2 receptor signaling should be further analyzed, since it may have therapeutic implications.

Reconstruction of a soft tissue defect of the back after myelomeningocele closure with modified V-Y plasty.

Myelomeningocele is a congenital defect in vertebral arches with cystic dilatation of meninges and structural or functional abnormality of spinal cord or cauda equina. It is a form of spinal dysraphisam with overlying skin defect (spina bifida aperta). That condition is related to other clinical complications such as infection that can produce furthermore complications. To prevent rate of complications surgical treatment in first 24 h is strongly suggested. In this case report we describe a patient (infant) with congenital myelomeningocele who's defect was treated surgically by the neurosurgeon. In operative procedure plastic surgeon was involved to cover the skin defect remaining after neurosurgical closure of spinal canal. Bilateral advancement local skin flaps were used in soft tissue defect closure. Review of the literature that refers to advancement local skin flaps was carried out.

Endoscopically assisted latissimus dorsi flap harvesting and breast reconstruction in young female with Poland syndrome.

We will describe a second phase of breast reconstruction on a young girl suffering from Poland syndrome. She has the breast, pectoralis major and minor muscle aplasia on the right side. She has no other deformities. The best result is achieved by combining latissimus dorsi flap and a silicone implant, and even better aesthetic result is accomplished with endoscopically assisted latissimus dorsi harvesting. Purpose of this operation is to correct the chest asymmetry and to accomplish good aesthetic result.

Combined vacuum-assisted closure treatment with laparoscopic mobilization of an omental flap and meshed skin grafts for reconstruction of infected sternotomy wounds: two cases.

In cardiac surgery, poststernotomy wounds are life threatening complications, with mortality up to 50%. We described two patients, who underwent coronary artery bypass grafting and postoperatively developed a deep sternal wound infection. Reconstruction was combined with vacuum-assisted closure treatment, laparoscopic mobilization of an omental flap and split thickens skin grafts. The omental flap is a well-vascularized local flap with a large surface area and has excellent immunologic and angiogenic properties. Both patients recovered completely. In our opinion, vacuum-assisted closure treatment and laparoscopic mobilization of great omentum is suitable option for treating deep sternal wounds.