Minimum inhibitory concentrations of chlorhexidine- and lactic acid-based teat disinfectants: An intervention trial assessing bacterial selection and susceptibility.

Teat disinfection is a recommended preventive tool to improve udder health and to prevent new intramammary infections. However, side effects are discussed, such as bacterial selection of less-susceptible bacteria with the application of certain teat disinfectants. The objective of this study was to assess the species composition and bacterial in vitro susceptibility by means of an interventive trial. For this purpose, 3 different postmilking teat treatments (disinfection with 0.215% chlorhexidine or 3.5% lactic acid, or control group with no dipping) were applied to 28 cows in a 6-d intervention approach using a split-udder design. Milk samples were taken before and after intervention. Bacteria were cultured and differentiated to species or genus level by MALDI-TOF mass spectrometry. Minimum inhibitory concentrations (MIC) were determined, and MIC changes over time were recorded. Susceptibilities to chlorhexidine and lactic acid were compared between species of the genera Staphylococcus, Streptococcus, Corynebacterium, and others. Species composition changed during the intervention. Under the treatment of chlorhexidine and lactic acid, the proportion of coagulase-negative staphylococci (CNS) decreased. An increased proportion of species belonging to the genus Corynebacterium was observed especially under the application of lactic acid. Although both teat disinfectants were basically effective, isolates differed in their susceptibility to both teat disinfectants. Populations of CNS, Staphylococcus aureus, and Corynebacterium spp. showed significantly lower absolute MIC values for chlorhexidine. Compared with other species, Corynebacterium spp. showed the lowest susceptibility for chlorhexidine as well as for lactic acid. A significant increase in MIC values after 6 d of intervention was observed with the lactic acid treatment in all isolates, as well as in CNS. This increase can be interpreted as either adaptation of isolates or displacement of more-susceptible species by less-susceptible species. Further studies using long-term intervention might reveal more pronounced effects on MIC values and species composition.

Study of enteric pathogens among children in the tropics and effects of prolonged storage of stool samples.

The study was performed to compare real-time PCR after nucleic acid extraction directly from stool samples as well as from samples stored and transported on Whatman papers or flocked swabs at ambient temperature in the tropics. In addition, the possible suitability for a clear determination of likely aetiological relevance of PCR-based pathogen detections based on cycle threshold (Ct) values was assessed. From 632 Tanzanian children <5 years of age with and without gastrointestinal symptoms, 466 samples were subjected to nucleic acid extraction and real-time PCR for gastrointestinal viral, bacterial and protozoan pathogens. Equal or even higher frequencies of pathogen detections from Whatman papers or flocked swabs were achieved compared with nucleic acid extraction directly from stool samples. Comparison of the Ct values showed no significant difference according to the nucleic acid extraction strategy. Also, the Ct values did not allow a decision whether a detected pathogen was associated with gastrointestinal symptoms.

Evaluation of different target genes for the detection of Salmonella sp. by loop-mediated isothermal amplification.

The loop-mediated isothermal amplification (LAMP) technique was used to investigate six salmonella-specific sequences for their suitability to serve as targets for the pathogen identification. Sequences selected for designing LAMP primers were genes invA, bcfD, phoP, siiA, gene62181533 and a region within the ttrRSBCA locus. Primers including single nucleotide polymorphisms were configured as degenerate primers. Specificity of the designed primer sets was determined by means of 46 salmonella and 32 other food- and waterborne bacterial reference species and strains. Primers targeting the ttrRSBCA locus showed 100 % inclusivity of target and exclusivity of other test species and strains. Other primer sets revealed deficiencies, especially regarding Salmonella enterica subsp. II-IV and Salmonella bongori. Additionally, primers targeting the siiA gene failed to detect S. enterica subsp. enterica serotypes Newport and Stanley, whereas bcfD primers did not amplify DNA of S. enterica subsp. enterica serotype Schleissheim. TtrRSBCA primers, providing short detection times and constant melting temperatures of amplification products, achieved best overall performance.

[Urinary retention with ruptured fornix caused by a maggot. An autoerotic accident]. / Harnstauung mit Fornixruptur durch Schmeissfliegenlarve Ein autoerotischer Unfall.

Foreign bodies in the urinary tract represent a possible cause for genitourinary disease. A huge variety of objects are inserted into the urinary tract for therapeutic, autoerotic, or psychiatric reasons and the symptoms for foreign bodies can be rather unspecific. Dysuria, hematuria, and urinary tract infection can suggest the presence of intravesical foreign bodies. Symptomatic urinary retention is more seldom and the causal foreign bodies are mostly iatrogenically applied. We present a unique case of maggots self-inserted into the urinary tract for autoerotic reasons causing symptomatic urinary retention with fornix rupture.

Significance of beta 2-toxigenic clostridium perfringens infections in animals and their predisposing factors--a review.

The novel beta 2-toxin of Clostridium perfringens has recently been described as the cause of enteric diseases in animals. The biological activity of beta 2-toxin is similar to that of the beta1-toxin with a possibly weaker cytotoxic activity. However, the production of beta 2-toxin in vitro is not seen in all beta 2-toxin-gene (cpb2)-positive C. perfringens strains, and to deduce a clinical importance solely from the detection of cpb2 is difficult. Detection of cpb2-positive C. perfringens from various animal species with and without enteric diseases demonstrates the wide distribution of cpb2 in nature, and the presence of cpb2 gene is therefore not considered a risk by itself. Predisposing factors like low trypsin activity in the intestinal tract, antibiotic and/or antiphlogistic treatment or changes in diet can result in the selection of beta 2-toxigenic C. perfringens which may lead to enteritis or enterotoxaemia.

Leukotriene-B4 concentrations in breathing condensate before and after simulated deep dives.

During diving the respiratory tract is exposed to occupational hazards (increased oxygen partial pressure, pulmonary vessel engorgement during submersion, inert gas micro embolism during decompression). Leukotriene-B4 [LTB4] concentrations in the exhaled breath mirrors the inflammatory activity of the airways if the respiratory tract has been exposed to occupational hazards. In this study LTB4-concentrations in the exhaled breath and spirometry data obtained before and after simulated dives helped to elucidate any contributions by hyperbaric exposure to impaired lung function and to separate effects of ambient pressure from those of submersion and increased oxygen partial pressure. Thirty two healthy subjects carried out dives in a hyperbaric chamber using a cross over design to 600 kPa ambient pressure with and without submersion and a dry exposure to pure oxygen at 120 kPa ambient pressure (durations: 43 min). Pre-dive and four hours after surfacing the exhaled breath was collected non-invasively. Condensate was measured by a standard enzyme immuno-assay for LTB4 in parallel with lung function values (FVC, FEV1, MEF 25-75). Pre-exposure baseline values of LTB4-concentrations and lung function values were in the normal range. Post-exposure values did not differ significantly from the baseline values. The data gave no evidence of any inflammatory activity in the subjects' airways after hyperbaric exposure.

Impact of selective prostaglandin E1 treatment on graft perfusion and function after liver transplantation.

BACKGROUND/AIMS: In several clinical trials, the prophylactic application of prostaglandin E1 did not demonstrate a significant effect on incidence of primary graft nonfunction after liver transplantation. The aim of this study was to evaluate the effect of a selective prostaglandin E1 treatment in liver transplant patients with initially compromised perfusion and thereby depressed early posttransplant graft function. METHODOLOGY: A total of 142 patients were enrolled in this study. In all of them, duplexsonography was performed daily to generally assess patency of allograft vessels and to specifically calculate the resistive index of the hepatic artery. Intravenous therapy with a prostaglandin E1 analogue (Alprostadil, 0.5 microg/kg/h) was initiated in 67 patients after determination of a primarily elevated (>0.75) and posttransplant increasing resistive index of the hepatic artery that was associated with continuously elevating aminotransferases. RESULTS: After initiation of treatment, the arterial resistive index decreased significantly from 0.83+/-0.1 to 0.72+/-0.1 on the first day of application (P<0.05). Primarily elevated serum levels of aspartate aminotransferase (AST: Alprostadil: 890+/-180 IU/L: CONTROL: 375+/-98 IU/L) and alanine aminotransferase (ALT: Alprostadil: 850+/-178 IU/L, CONTROL: 310+/-79 IU/L) decreased significantly and reached values comparable to the control group after three days of therapy (AST: Alprostadil: 190+/-40 IU/L, CONTROL: 150+/-45 IU/L ALT: Alprostadil: 280+/-57 IU/L, CONTROL: 180+/-50 IU/L) (P<0.05). Only 2 grafts with initial compromised perfusion and function (3%) developed primary graft nonfunction. CONCLUSIONS: Prostaglandin E1 seems to be effective in ameliorating ischemia-reperfusion injury to the liver in patients with elevated arterial vascular resistance and early depressed graft function after liver transplantation. Duplexsonography in combination with graft function are useful tools for indicating and monitoring treatment.

Application of MARS artificial liver support as bridging therapy before split liver retransplantation in a 15-month-old child.

Molecular Adsorbent Recirculating System (MARS) is a blood-filtering system designed to provide biological artificial liver support. We describe its use in a small child to illustrate its effectiveness and practicality in this age group. A 15-month-old male underwent split liver transplantation for acute liver failure following bone marrow transplantation. After development of graft dysfunction we instituted MARS-dialysis. MARS therapy led to a dramatic fall in serum bilirubin and transaminases. Liver synthetic function was not affected. This was accompanied by a stabilization of the patients clinical condition until repeat split liver transplantation was performed 2 weeks after the first graft. MARS-dialysis is practical in the small child. In this case, it did not provide definitive treatment but was an excellent bridging therapy before retransplantation.

Assessment of frequencies of lifestyle factors and polymorphisms of drug-metabolizing enzymes (NAT2, CYP2E1) in human hepatocellular carcinoma (HCC) patients in a department of surgical medicine--a pilot investigation.

The pathogenesis of human hepatocellular carcinoma (HCC) is a multistage process with the involvement of a multifactorial etiology. The role of drugs as risk factors has not been conclusively ascertained, but it appears that the use of oral contraceptives can be included. In the multifactorial etiology of human hepatocellular carcinoma (HCC), an association and interaction between genetic polymorphisms of xenobiotic metabolizing enzymes, lifestyle factors and cancer risk has been postulated. This pilot investigation examines the frequency of polymorphisms in selected genes (NAT2, CYP2E1) coding for xenobiotic metabolizing enzymes, and life-style habits (cigarette smoking, alcohol consumption) in 38 HCC patients. Genotyping of xenobiotic metabolizing enzymes was carried out using polymerase chain reaction--restriction fragment length polymorphism methods and DNA extracted from peripheral blood cells. In addition, HCC patients were interviewed with regard to their cigarette smoking habits and alcohol consumption using a standardized questionnaire. The results of this pilot investigation showed that the majority of the HCC patients smoke and consume alcohol. We found no predominance of slow acetylators (45%) or rapid acetylators (55%). 70.6% of slow acetylators were smokers. 86.5% of all patients with homozygote PstI/RsaI genotype also carried the homozygote DraI genotype, whereas 10.8% of all subjects with heterozygote PstI/RsaI genotype also carried the heterozygote DraI genotype. These genotype frequencies remain to be confirmed in a larger ethnic group. Whether polymorphisms of xenobiotic metabolizing enzymes is an important risk factor in (cigarette smoking-/alcohol consumption) HCC or not is currently being investigated in a case-control study in the same ethnic group.

[HELLP Syndrome as an indication for liver transplantation]. / HELLP-Syndrom als Indikation für eine Lebertransplantation.

Liver rupture followed by multiorgan failure is perhaps the most catastrophic complication of the HELLP syndrome (hemolysis, elevated liver function, low platelets). Specific treatment options are currently limited and not routinely clarified. Here, we present a patient successfully managed by an innovative surgical approach consisting of combined total hepatectomy, portacaval shunt, and liver transplantation. A 26-year-old primipara (39th week of gestation) who suffered liver rupture as a complication of HELLP syndrome after delivery underwent a portacaval shunt after total hepatectomy. This combination was sufficient until the patient underwent orthotopic liver transplantation. The patient was discharged from the hospital after a dramatic recovery. Bridging portacaval shunt and consecutive orthotopic liver transplantation represented an effective therapy for this patient and should be considered early as a treatment option in patients with liver rupture complicating severe HELLP syndrome.

Long-term combination of interferon alfa-2b and ribavirin for hepatitis C recurrence in liver transplant patients.

The purpose of this study was to evaluate the feasibility, tolerability and efficacy of long-term combination therapy with interferon-alfa 2b (IFNalpha-2b) and ribavirin (Rb) for recurrent hepatitis C after liver transplantation. Fifteen patients with histologically confirmed hepatitis C after liver transplantation were treated. After a basic course of 12 months (IFNalpha-2b 3 MU/3 times a week; Rb 3 x 200 mg/day), patients achieving clearance of viremia underwent maintenance therapy with ribavirin (3 x 200 mg/day). Patients without virological response continuously received combination therapy. Levels of HCV RNA, aminotransferases and bilirubin were followed. Therapy led to a significant decline of transaminases and bilirubin in all patients (p < 0.05). Sixty-four per cent of patients had clearance of viremia after 12 months. Sustained virolo gical response was 88%. In patients without virological response, continuation of combination therapy prevented another biochemical relapse of hepatitis. Treatment was accompanied by severe hematological side-effects, requiring medical support in a majority of patients. In two patients (13.5%), therapy finally had to be withdrawn because of major hematological disorders. These results indicate that long-term combination therapy with IFNalpha-2b and Rb is effective in the treatment of recurrent hepatitis C and in preventing further relapse of disease after liver transplantation, but side-effects may require cessation of therapy.

Differentiated therapy with prostaglandin E1 (alprostadil) after orthotopic liver transplantation: the usefulness of procalcitonin (PCT) and hepatic artery resistive index (RI) for the evaluation of early graft function and clinical course.

Increasing demand for donor organs has led to new pharmacological concepts for reducing ischemia-reperfusion injury (I/R) of the graft after liver transplantation to prevent primary non-functioning of the organ. Prostaglandins have proved to be cytoprotective in several experimental models of ischemia and transplantation. The prophylactic administration after orthotopic liver transplantation is still a subject of controversial discussion. The aim of our study was the evaluation of the post-transplant hepatic artery resistive index (RI) measured by color Doppler imaging, in combination with postoperative elevation of transaminases, as parameters indicating the need for a differentiated systemic therapy with prostaglandin E1 (PGE1) (alprostadil). In addition, the value of serum procalcitonin (PCT) as a postoperative parameter for the extent of I/R is investigated. In the case of post-transplant elevated hepatic artery RI (RI > 0.75), the administration of PGE1 led to a significant reduction of transaminases (p < 0.05) and a decline of the RI. In addition, postoperative PCT levels could be reduced significantly by PGE1 application. These results suggest that determination of RI is feasible for indicating a need for therapy with PGE1. Its targeted application reduces hepatocellular damage due to I/R after liver transplantation.

[Reversal of therapy of postoperative complications by measuring lung water]. / Postoperative Komplikationen Therapieumkehr durch Lungenwassermessung.

Our data suggest that the indicator dilution technique allows differentiated and early prediction of cardiopulmonary complications during the postoperative period. This leads to significant changes in fluid therapy to prevent organ failure.

[Angioimmunoblastic lymphadenopathy with cutaneous manifestations in a 13-year-old girl]. / Angioimmunoblastische Lymphadenopathie mit kutanen Manifestationen bei einem 13jährigen Mädchen.

We describe a 13-year-old girl with angioimmunoblastic lymphadenopathy. The patient's main symptom was a generalized pruritic maculopapular rash located mainly on the upper and lower limbs. In addition to the skin lesions, physical examination revealed enlarged cervical, axillary and inguinal lymph nodes. There were also hepatosplenomegaly and oedema of both hands. Blood examination showed elevated ESR, haemolytic anaemia, polyclonal hypergammaglobulinaemia and eosinophilia. Virus serology including HIV I and II and HTLV I was negative. Histopathological examination of a lesional skin biopsy showed superficial and deep dermal infiltrate extending into the subcutaneous tissue. The infiltrate consisted of lymphocytes, some with atypical nuclei, histiocytoid cells, and few eosinophils. There was also proliferation of dermal blood vessels. Examination of an enlarged cervical lymph node disclosed typical histopathological features of angioimmunoblastic lymphadenopathy and confirmed the diagnosis.

[Fever, somnolence, vomiting, diarrhea]. / Status febrilis, Somnolenz, Erbrechen, Diarrhöe.

A 69-year-old female was admitted because of a febrile state, somnolence, nausea and diarrhea. Addison's disease known to have developed several years earlier after adrenal tuberculosis suggested Addisonian crisis triggered by an acute infection. Therapy with steroids and substitution of electrolytes and fluid led to rapid improvement. Streptococcus bovis was identified as causative agent. The known association of this germ with cancer of the colon led to further investigation which revealed cancer of the sigmoid and incidental cancer of a salpinx. After surgical removal of both cancers, the patient has remained free of complaints under substitution of steroids.