Inhibition of Listeria monocytogenes biofilms by bacteriocin-producing bacteria isolated from mushroom substrate.

AIMS: This study was designed to investigate the ability of naturally occurring bacteria isolated from mushroom substrate to prevent biofilm formation by Listeria monocytogenes or to remove existing biofilms in mushroom production facilities. METHODS AND RESULTS: It is generally recognized that L. monocytogenes forms biofilms that can facilitate its survival in food-processing environments. Eleven bacteriocin-producing isolates were identified and the bacteriocins characterized based on heat and enzyme inactivation studies. Further characterization was undertaken by MALDI-TOF mass spectrometry, PCR and sequencing. Production of nisin Z (by Lactococcus lactis isolates), subtilomycin (by Bacillus subtilis isolates) and lichenicidin (by Bacillus licheniformis and Bacillus sonorensis isolates) was detected. In co-culture with L. monocytogenes, the bacteriocin-producing strains could prevent biofilm formation and reduce pre-formed biofilms. CONCLUSIONS: Mushroom substrate can be a source of bacteriocin-producing bacteria that can antagonize L. monocytogenes. SIGNIFICANCE AND IMPACT OF THE STUDY: The results highlight the potential of bacteriocin-producing strains from mushroom substrate to reduce L. monocytogenes biofilm in food production environments, contributing to a reduction in the risk of food contamination from the environment.

Congenital agenesis of the inferior vena cava - cause of deep vein thrombosis.

Agenesis of the inferior vena cava is an extremely rare abnormality, most often discovered by accident. This paper reports the case of a 41-year-old male patient, admitted to the IIIrd Emergency General Surgery Clinic of the Emergency University Hospital with the diagnosis of bilateral pelvic limb post-thrombotic syndrome. According to his personal history he had the first vascular surgical intervention at the age of 6. The surgical indication was determined by large hydrostatic varicoseveins of the lower limbs and the performed surgery was cosectomy with bilateral stripping of the great saphenousvein. Until admission to our clinic, the patient had repeated surgery for recurrent varicose veins of the lower limbs. The patient was diagnosed in our service with congenital agenesis of inferior vena cava, the evolution was good and the patient was discharged after 17 days. This paper presents the clinical,imagistic and therapeutic particularities of such a case. Imagistic detection of early vascular abnormality, identifying procoagulant factors and the close care of the local lesion areessential for patient evolution.

Retrospective study minimally invasive management of postoperative lithiasis of the common bile duct.

INTRODUCTION: Postoperative common bile duct (CBD) lithiasis holds a significant place in the bilio-pancreatic pathology, both due to its high frequency as well as to the diagnostic and treatment issues it triggers. MATERIAL AND METHODS: Based on a 5-year experience (2008-2012), assessed retrospectively, totalling 51 patients with postoperative lithiasis of CBD, we tried to elaborate on several recommendations for the treatment of this pathology. The recommendations were guided by the existing alternative therapeutic options and by the ideas in the literature regarding the results achieved by every manner of treatment. RESULTS: The rate of clearance of the CBD was of 93.6%,the morbidity rate was of 10.65% and the mortality rate was of 0%, which entitles us to deem the effectiveness of the minimally invasive treatment as maximum in the treatment of this pathology. CONCLUSIONS: The endoscopic treatment of postoperative lithiasis of the CBD proved to be possible, efficient and we believe it good to be used as a principle; open surgery should be the solution in case of failures or of contraindications to minimally invasive treatment.

Spatio-Temporal Pattern of Tuberculosis Distribution in Romania and Particulate Matter Pollution Associated With Risk of Infection.

The study proposes a dynamic spatio-temporal profile of the distribution of tuberculosis incidence and air pollution in Romania, where this infectious disease induces more than 8,000 new cases annually. The descriptive analysis for the years 2012-2021 assumes an identification of the structuring patterns of mycobacterium tuberculosis risk in the Romanian population, according to gender and age, exploiting spatial modeling techniques of time series data. Through spatial autocorrelation, the degree of similarity between the analyzed territorial systems was highlighted and the relationships that are built between the analysis units in spatial proximity were investigated. By modeling the geographical distribution of tuberculosis, the spatial correlation with particulate matter (PM2.5) pollution was revealed. The identification of clusters of infected persons is an indispensable step in the construction of efficient tuberculosis management systems. The results highlight the link between the distribution of tuberculosis, air pollution and socio-economic development, which requires a detailed analysis of the epidemiological data obtained in the national tuberculosis surveillance and control program from the perspective of geographical distribution.

Minimally invasive treatment of cholecysto-choledochal lithiasis - "Rendez-vous" technique.

INTRODUCTION: In our paper we present the results of a study that was meant to provide a complex answer to the question:"Which is the most appropriate, most correct and least expensive treatment for mixt cholecysto-choledochal lithiasis(MCCL)?" MATERIAL AND METHODS: Based on a five year experience (2008-2012), analysed retrospectively, during which 143 patients with MCCL were treated, we are trying to find answers to some of the questions that we have asked ourselves from the very beginning of this period. The answers were guided by alternative therapeutic options, for a pathology that does not have a "gold standard", with respect to the solutions available. RESULTS: Given the fact that the period during which the study was conducted was chosen randomly and that the patients were included consecutively, the representativeness of the results is ensured for any other patient diagnosed with this pathology and admitted to a clinic with the same specialty, dimensions and equipment as the one presented. CONCLUSIONS: This paper compares the results of our study to those of others, in terms of different or similar approach therapeutic options, developed in other minimally invasive surgery centres in the world, the final conclusions being encouraging for the therapeutic sequence that we practice.

Is prosthetic repair of the abdominal wall in clean-contaminated surgical interventions possible?

The present study tries to provide an expressive, customized answer to the question in the title. The study relies on a ten-year experience (2000-2009), evaluated retrospectively on a group of 488 prosthetic repairs of incisional herniae, out of which 432 were performed in a clean environment and 56 cases in a clean-contaminated one. The two groups are superimposable based on the Apache score. The visceral surgical procedures associated to the surgery of the parietal defect were varied (cholecystectomy, appendectomy, enterectomy enterorrhaphy,colectomy colotomy-colorrhaphy, hysterectomy with adnexectomy). The assessment of postoperative suppurative complications showed no significant differences between the two groups (p 0.001). These results lead us to the idea of defining the indication for parietal prosthetic repair in a contaminated environment. The major factors of this decision are: the nature, the source and the amount of the septicinoculum, the duration of exposure, the intensity of the host inflammatory response (more difficult to quantify), and finally the surgical judgment. The last mentioned factor will evaluate the above-mentioned data and will take into account that not all bacterial contaminations are necessarily followed by an established infection. Thus, additional exaggerations - which would mean taking useless, ineffective precautions- as well as negative exaggerations - which would mean hazardous boldness- will be avoided.

Prognostic and predictive factors in colorectal cancer.

Colorectal cancer (CRC) is an important public health problem; it is a leading cause of cancer mortality in the industrialized world, second to lung cancer: each year there are nearly one million new cases of CRC diagnosed worldwide and half a million deaths (1). This review aims to summarise the most important currently available markers for CRC that provide prognostic or predictive information. Amongst others, it covers serum markers such as CEA and CA19-9, markers expressed by tumour tissues, such as thymidylate synthase, and also the expression/loss of expression of certain oncogenes and tumour suppressor genes such as K-ras and p53. The prognostic value of genomic instability, angiogenesis and proliferative indices, such as the apoptotic index, are discussed. The advent of new therapies created the pathway for a personalized approach of the patient. This will take into consideration the complex genetic mechanisms involved in tumorigenesis, besides the classical clinical and pathological stagings. The growing number of therapeutic agents and known molecular targets in oncology lead to a compulsory study of the clinical use of biomarkers with role in improving response and survival, as well as in reducing toxicity and establishing economic stability. The potential predictive and prognostic biomarkers which have arisen from the study of the genetic basis of colorectal cancer and their therapeutical significance are discussed.

[Certitudes and controversy regarding neural elements preservation in total mesorectal excision technique (ETM)]. / Certitudini si controverse privind conservarea elementelor nervoase în tehnica de excizie totala a mezorectului (ETM).

The total excision of the mezorect, as a technique of reference in the surgical solution of rectal cancer, is evaluated today through the view of the oncological and functional outcome. Within the functional outcome, the genito-urinary disorders which follow the damage of the pelvic vegetative nervous structures, still cause discussions and controversy among dedicated specialists in this area. The work plans to share an experience of over ten years of ETM practice, in which the technico-tactical accumulation have been realized progressively, outlining a relatively codificated attitude, centered on the "critical moments" of this intervention.

Peculiarities of diagnosis and treatment in the polyp-cancer sequence.

Colorectal cancer, a public health problem with major social implications, has attracted major economic resources and specialized centers focused in the direction of obtaining an early diagnosis from effective screening means in the last decades. It is obvious that the therapeutic results and the social costs are primarily dependent on the precocity of diagnosis. The present paper aims to bring to attention a number of orientations, which may open a new perspective in approaching the genetic and molecular level of these lesions. Out of these, the value of the molecular screening based on the detection of the APC gene located on the short arm of chromosome 5, a method that allows the selection of the subjects to be subjected to further endoscopic screening is underlined. The optimization of the costs as well as the increased compliance of the subjects to such a method is thus accomplished.

Map syndrome (MYH Associated Polyposis) colorectal cancer, etiopathological connections.

The case presented raised our scientific curiosity and it is worthy of being brought in front of the medical audience because of several reasons presented below. Presently, there are 3 hereditary syndromes that have a demonstrated etiological relationship with the colorectal cancer: Familiar Adenomatous Polyposis (FAP syndrome), HNPCC syndrome (Hereditary Nonpoliposis Colorectal Cancer) and MAP syndrome.Discovered only in 2002, the MAP syndrome (MYH associated polyposis) is the first hereditary syndrome that has autosomal recessive transmission. The APC gene can be mutated in several ways during the colonic oncogenesis: congenital in the FAP syndrome, somatic in sporadic colorectal cancers and secondary to the MYH gene inactivation in MAP syndrome. MAP phenotype is similar to the FAP phenotype because of the somatic mutations to the APC gene. Colonic polyposis is lower than FAP syndrome and appeared later, in the 40's and 50's. Colorectal cancers are frequent and discovered in the same moment as the colonic polyposis. Patients are diagnosed mostly in cancer stages. Colonoscopy shows polyps disseminated around the entire colic frame. Treatment in these cases is total rectocolectomy with ileoanal anastomosis. When working in a general emergency surgery clinic, physicians are often faced with colorectal cancers in different evolutive stages, and mostly they are faced with their complications.