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Liver abscess.

A liver abscess may occur secondary to an umbilical vein catheterization or infection in other parts of the body, and is associated with immune deficiencies, especially chronic granulomatous disease. There are no specific signs and symptoms, but an unexplained fever with upper abdominal tenderness and an enlarged liver were present in all of our cases. A liver-spleen scan is the most useful diagnostic test, demonstrating a filling defect in the liver. A single abscess may be unroofed and drained. When multiple abscesses are found, as many as possible are drained, but long-term specific antibiotic therapy is the most important treatment.

Child

Genomic prediction and genome-wide association study for liver abscesses in crossbred beef cattle.

Liver abscesses are a concern in feedlot cattle, and little is known about the role of genetics in their development. This study aimed to estimate genetic parameters and to identify single-nucleotide polymorphisms (SNPs) associated with liver abscesses. Crossbred cattle representing 18 breeds in the U.S. Meat Animal Research Center Germplasm Evaluation Program were phenotyped for liver abscesses at slaughter (n&#x2005;=&#x2005;9,044). Seventeen percent of cattle had liver abscesses. These cattle had genotypes that were imputed to sequence variant genotypes. After filtering and quality control, 340,723 SNPs were used in the analysis. Liver abscess prevalence was modeled with a single-step genomic best linear unbiased prediction (ssGBLUP) threshold model using a Bayesian framework. The model included contemporary group (sex, treatment group, and slaughter date), additive genomic, and residual effects. Genomic heritability was 0.039 (95% highest posterior density&#x2005;=&#x2005;0.005, 0.081), which was very small. To assess prediction quality, a 5-fold random cross-validation structure was used. Method Linear Regression was used to assess accuracy, bias, and dispersion by comparing estimated breeding values (EBV) from full and reduced analyses. Cross-validation metrics showed EBV based on genotypes had 0.05 reliability (SD&#x2005;<&#x2005;0.01) with no bias relative to EBV based on genotypes and phenotypes. For the genome-wide association study, SNP effects were back calculated from the EBV solutions from ssGBLUP. No SNPs were associated with liver abscesses at a Benjamini-Hochberg adjusted 0.05 significance level. Although a large dataset was used, this result was because of the low genomic heritability and imprecise EBV used to calculate SNP effects. Based on these results, environmental factors contribute to most of the variation in liver abscesses. Genetic selection to reduce liver abscesses would be slow because of the low genomic heritability, measurement late in life, and inability to measure breeding animals. A faster approach would be finding additional environmental interventions that maintain animal performance.

Animals

Drug and immuno-diagnostic resistant amoebic liver abscess in Ibadan: an elucidation of a possible mechanism.

A thick fibrous walling of amoebic abscess of the liver is very rare. Using as a basis the case of drug and immunodiagnostic resistant amoebic liver abscess in an adult Nigerian, an account is given of the possible mechanisms for such therapeutic and diagnostic failure. A theory of blood-abscess cavity barrier is postulated and suggested as a mechanism for the constant failure to detect antibodies to E. histolytica in the small percentage of cases of amoebic liver abscess (Morris, Powell and Elsdon-Dew, 1970). A study of the rate of diffusion of amoebic excretion/secretion through a thick fibrous tissue or artificial membrane of comparable properties is strongly advocated.

Adult

[Cryptogenic liver abscess (author's transl)].

The successful treatment of two patients with cryptogenic liver abscess, a special type of pyogenic abscess, is reported. Quick diagnosis by methods which do not distress the patient, e. g. scintigraphy and echography, leads to a decisive improvement in the prognosis. Opinions are given on the differential diagnosis of cryptogenic, pyogenic and parasitic (amebic) liver abscesses. The good chances for treatment of cryptogenic abscesses compared with the secondary pyogenic liver abscesses are to be found not least in their usually solitary appearance. This is shown particularly clearly in the classification of the patients operated on for pyogenic liver abscess in our hospital in the last ten years into multiple and solitary liver abscess. As in the pyogenic abscess, so in the primary cyptogenic liver abscess is transperitoneal open drainage the method of choice for treatment.

Diagnosis, Differential

Tinidazole for the treatment of amoebic liver abscess.

Ten patients suffering from amoebic liver abscess were treated with tinidazole (Fasigyn) 800 mg t.d.s. for 5 days. Nine were cured, and 1 patient required further treatment with other drugs. Following this, a double-blind trial was carried out to compare a group of patients treated with tinidazole with a similar group treated with metronidazole. Each series consisted of 14 patients. In the tinidazole series 13 patients were cured and for 1 patient the result of treatment was dubious. All patients in the metronidazole series were cured, but 1 patient admitted to the trial had previously not been cured by metronidazole. It appears that tinidazole and metronidazole are equally efficaceous in the treatment of amoebic liver abscess.

Clinical Trials as Topic

Radiocolloid imaging in primary liver cancer and amoebic liver abscess. Accuracy of differential diagnosis and extent of inter-observer variability.

Radiocolloid liver scans from 58 patients with primary liver cancer and 56 patients with amoebic liver abscess were examined 'blind' and independently by three nuclear physicians and one registrar in training in order to evaluate the accuracy of the differential diagnosis between the two conditions and to assess the extent of inter-observer variability in the interpretation of these scans. Each of the observers incorrectly interpreted about 12% of scintiphotographs and at least one observer was wrong in 25% of the scans. The difference in diagnostic accuracy between individual observers was not statistically significant. Observers disagreed in 21,6% of the scans. The main reasons for misdiagnosis were failure to realize that excessive extrahepatic uptake of radiocolloid can occur with liver abscesses, and the indistinguishable appearance of the defect or defects in some cases of primary liver cancer and amoebic liver abscess. This margin of error and of inter-observer variability must be borne in mind when interpreting liver scans of patients thought to have either primary liver cancer of amoebic liver abscess.

Colloids

Liver abscess. A complication of regional enteritis.

A patient with liver abscess in association with regional enteritis is reported. Liver abscess should be suspected in patients with regional enteritis who present with fever, elevated serum alkaline phosphatase, liver tenderness, right upper quadrant pain or hepatomegaly.

Alkaline Phosphatase

Solitary liver abscess: a continuing medicosurgical problem.

The management problems of 22 patients with solitary liver abscess are reviewed. To achieve earlier diagnosis, and reduce the high mortality rate of this condition (32% in this series), clinicians need to change their data base of the clinical presentation and also to incorporate liver imaging as part of the routine investigation of a patient with pyrexia of uncertain origin. The problems associated with operative diagnosis, and with methods of surgical drainage are discussed. The need for careful bacteriological cultures is emphasized, and the use of the most appropriate antibiotics is described. While in many cases the cause of the liver abscess remains unknown, in Australia the possibility of the abscess being amoebic or an infected hydatid cyst should be kept in mind.

Adolescent

Successful medical treatment of pyogenic liver abscess.

Between 1976 and 1978, 6 patients with proven or probable pyogenic liver abscess were successfully treated at Los Angeles County-University of Southern California Medical Center without surgical drainage. Although surgical therapy is necessary in patients with coexisting intraabdominal pathology, antibiotic therapy without surgical intervention is an option to be considered in patients with pyogenic liver abscess and no evidence of other intraabdominal disease.

Adult

Comparative study of tinidazole and metronidazole in amoebic liver abscess.

Twenty proven cases of amoebic liver abscess were treated at random with either tinidazole or metronidazole. The dose of both was 2 g once daily for 2 days. Clinical, radiological, and biochemical follow-up was done for 30 days. Of the 19 patients who completed the trial, complete recovery was observed in all 10 patients given tinidazole and in 5 of 9 patients given metronidazole (p=0.05). Moreover, patients on tinidazole required repeat aspirations less frequently than those on metronidazole. Mild gastrointestinal side-effects occurred in 1 patient on metronidazole. The results suggest that tinidazole is a more efficacious drug than metronidazole, with rapid therapeutic effect.

Adult

The serum protein pattern in primary hepatoma and amoebic liver abscess.

A study of the serum proteins pattern of 30 patients with primary liver cell carcinoma and 11 with amoebic liver abscess was carried out. When compared with controls significant differences were found for both conditions in the values of pre-albumin, transferrin, albumin, haptoglobin, alpha 2-macroglobulin, and alpha 2HS-glycoprotein. In the differential diagnosis of amoebic liver abscess and primary hepatic carcinoma, the estimation of albumin, alpha 1-acid glycoprotein, haptoglobin ceruloplasmin, alpha 2H2-glycoprotein and transferrin was found helpful.

Adult

Treatment of amoebic liver abscess with tinidazole and metronidazole.

20 patients with amoebic liver abscess, confirmed by aspiration of typical amoebic 'pus', were treated in random order with either tinidazole or metronidazole in a dose of 2g once daily for 2 days. Clinical, radiological, and biochemical follow-up was done for 1 month. One patient, given metronidazole, absconded and 19 completed the trial. Complete recovery occurred in all 10 patients given tinidazole but in only 5 of the 9 given metronidazole (p = 0.05). Patients on tinidazole required repeat aspirations less frequently than those on metronidazole. Mild gastrointestinal side-effects occurred in 1 patient on metronidazole but in none on tinidazole. From the present study, tinidazole appears to be a more effective, better tolerated drug with a more rapid therapeutic effect than metronidazole.

Adult

Amoebic liver abscess in patients presenting with jaundice. A report of 5 cases.

Five patients with severe jaundice resulting from amoebic liver abscess are described. All had features of hepatic parenchymal damage and cholestasis, and 1 patient developed hepatic coma. In addition, acute tubular necrosis and renal failure occurred in 3 patients. Four patients in the series survived. The importance of early recognition and treatment of amoebic liver abscess in patients presenting with jaundice is emphasized, so that the serious and often fatal complications of hepatic and renal failure can be prevented.

Adult

Amoebic liver abscess: a retrospective clinical evaluation of twenty-seven cases.

Twenty-seven patients with Amobebic Liver Abscess were observed during the last two years and were analysed retrospectively with respect to diagnostic procedures and therapeutic strategies. Seven of the 27 patients had surgery and were subsequently referred to our hospital. Those patients with surgery had a longer duration of illness and hospitalization (3.3 months) compared to the other 20 patients with chemotherapy alone (2 months). Most important diagnostic parameters for extraintestinal amoebiasis were: typical clinical findings, time spent in tropical or subtropical countries, strongly positive Latex agglutination against Entamoeba histolytica antigen, and isotope and/or ultrasound scanning to confirm abscess formation in the liver. The vast majority of abscesses were found in the right liver lobe. Response to treatment with complete cure was seen in all patients, regardless of whether Metronidazole alone or combinations of Metronidazole with Chloroquine and Metronidazole and Dehydroemetine or Chloroquine and Dehydroemetine were used. There is a need for prospective therapeutic studies to compare the different drug regimen concerning side-effects, toxicity, costs, application, and duration of hospitalization. From the retrospective data it seems that surgery is not beneficial for the patients.

Adult

Hypervirulent Klebsiella pneumoniae ST23 causing pyogenic liver abscess and metastatic endogenous endophthalmitis in Europe: a case report.

INTRODUCTION AND IMPORTANCE: Pyogenic liver abscess (PLA) has traditionally been considered prevalent in Asia. However, its incidence is increasing in Europe. Klebsiella pneumoniae (Kp) has emerged as the leading causative pathogen, and hypervirulent strains pose a higher risk of invasive disease and metastatic complications, such as endogenous endophthalmitis (EE). CASE PRESENTATION: The case describes a 77-year-old woman who presented with fever and right upper quadrant abdominal pain. She was diagnosed with a second episode of PLA within 3 months, caused by Kp. Despite prompt antimicrobial therapy and percutaneous transhepatic drainage, the patient developed acute vision loss in the left eye during hospitalization. Ophthalmologic assessment confirmed EE secondary to bacteremia. Whole-genome sequencing identified the isolate as hypervirulent Kp (hvKp) sequence type 23 (ST23). While the liver abscess resolved following treatment, the patient sustained permanent loss of vision in the affected eye despite aggressive medical and surgical management. CLINICAL DISCUSSION: This case illustrates the invasive nature of hvKp and its potential for recurrence and metastatic complications. Improved recognition through targeted virulence testing is essential to avoid underdiagnosis. CONCLUSION: This case highlights the aggressive nature of hvKp. Early recognition of systemic and ocular symptoms, prompt ophthalmologic evaluation, and timely source control are essential. Optimal management requires multidisciplinary collaboration and the use of molecular diagnostics, including whole-genome sequencing, to identify hypervirulent lineages and support surveillance.

Klebsiella pneumoniae

Amebic peritonitis following rupture of an amebic liver abscess. Successful treatment of two patients.

We present two successfully treated cases of amebic peritonitis. Acute peritonitis secondary to intra-abdominal rupture of an amebic liver abscess is an infrequent but serious complication of invasive amebiasis. Its diagnosis should be considered in anyone with a suspected liver abscess, jaundice, or diarrhea in whom peritonitis develops. This diagnosis should be further suggested in the United States if the patient is a male and is of Mexican origin in areas where this racial group constitutes the majority of cases of amebic disease. Use of radioisotope liver scans and the demonstration of serum precipitins to Endamoeba histolytica may provide rapid evidence of invasive disease, although surgical intervention is often necessary to make a specific diagnosis. Emetine hydrochloride alone or followed by metronidazole combined with surgical drainage is the current treatment for amebic peritonitis.

Adult