Although many papers concerning the ultrasonographic findings of liver abscess have been appeared, there is afew literatures for the analysis of its echognic patterns. Twenty-nine cases of surgically proven liver abscesswere studied by ultrasonography in our hospital during recent 3 years. The results were as follows: 1.Ultrasonography permitted correct diagnosis in 26 of 29 patients with sensitivity 90%. 2. All the 7 cases ofamebic abscess were single lesions and 6 cases of them were distributed in the right lobe of liver, while pyogenicabscesses showed single or multiple lesions. It was very difficult to distinguish pyogenic abscess from amebicabscess in cases of single lesion. 3. It was impossible to differentiate pyogenic abscess from amebic abscess bythe echopattern of abscess wall and internal echogenicity. 4. The wall of obscess was ill-defined in the majority,and internal echogenecity of abscess was variable although weak internal echogenecity was more comon. 5. Theechopattern of abscess was gradually converted to echolucent or hypoechoic area with weak internal echoes infollowing up study. 6. Clinical findings and ultrasonic findings should be carefully analysed to secure correctdiagnosis of there is any possibility of co-existing necrotizing metastatic lesion.
Abscess ; Amebiasis ; Diagnosis ; Humans ; Liver Abscess ; Liver ; Ultrasonics ; Ultrasonography

A patient with amebic colitis in which the rare complication of ameboma developed accompanying liver abscess is presented. The diagnosis was made by colonic mucosal biopsy and microscopic stool examination which revealed hematophagous trophzoites of Entamoeba histolytica. All rnanifestations of this patient's illness, including liver abscess, completley reverted to normal after appropriate therapy.
Amebiasis* ; Biopsy ; Colon ; Diagnosis ; Dysentery, Amebic* ; Entamoeba histolytica ; Humans ; Liver Abscess* ; Liver*

Indirtct fluorescent antibody and immobilization tests on Eatamoeba histolytica have been carried out using the sera of 84 Cheju-islanders, a highly endemic area of amebiasis in Korea. The sera were divided into seven groups; 1) liver abscess (E. histolytica in liver), 2) liver abscess (E. histolytica in stool), 3) liver abscess (E. histolytica not demonstrated by examinations of abscess and stool), 4) hepatomegaly (E. histolytica in stool), 5)hepatomegaly (E. histolytica not found in stool), 6) cyst carrier, symptomless healthy individuals and 7) control group. 1. The indirect fluorescent antibody test, 100 per cent of cases with group 1 and group 2, 40 per cent with group 3 and group 4, 33.3 per cent with group 5, 50 per cent with group 6 and 5.9 per cent with control group were found positive at 1:16 or higher. Higher titers were manifested in proved liver abscess, but lower titres were in cyst carrier and control group. 2. The immobilization test, 100 per cent of sera in group 1, 2 and 3, 8O per cent in group 4, 90.5 per cent in group 5, 40 per cent in cyst carrier and 23.5per cent in control group showed positive. 3. Both tests were positive in all sera of group 1 and 2, six sera out of 15 in group 3, four out of 10 in group 4, seven out of 21 in group 5, two out of 10 in cyst carriers and one out of 17 in controls. 4. Indirect F-A titers were not correlated with the rate of immobilization. Therefors it is suggestive that the two methods will be preferable for the diagnosis of suspicious cases of amoebiasis.
Amebiasis/*diagnosis ; Entamoeba histolytica/*immunology ; Female ; Fluorescent Antibody Technique ; Human ; Korea ; Male ; Serologic Tests

Amebic liver abscess (ALA) is the most common extraintestinal manifestation of amebiasis. Amebiasis, a parasitic infection caused by Entamoeba histolytica, used to be a prevalent protozoan disease in Korea, however, with an improving sanitary system, it has been among very uncommon etiology of liver abscess. A recent report suggested that ALA is an emerging parasitic infection in human immunodeficiency virus (HIV)-infected patients even in areas where the disease is not endemic and recommended HIV screening in patients in areas where ALA is not endemic, particularly those without history of travel to a disease-endemic area. We report on two patients who were admitted for treatment of ALA and then diagnosed as HIV infection. We also reviewed the etiology and characteristics of ALA in our hospital during the last 5 years.
Amebiasis ; Diagnosis* ; Entamoeba histolytica ; HIV Infections ; HIV* ; Humans* ; Korea ; Liver Abscess ; Liver Abscess, Amebic* ; Mass Screening

Amebic liver abscess (ALA) is the most common extraintestinal manifestation of amebiasis. Amebiasis, a parasitic infection caused by Entamoeba histolytica, used to be a prevalent protozoan disease in Korea, however, with an improving sanitary system, it has been among very uncommon etiology of liver abscess. A recent report suggested that ALA is an emerging parasitic infection in human immunodeficiency virus (HIV)-infected patients even in areas where the disease is not endemic and recommended HIV screening in patients in areas where ALA is not endemic, particularly those without history of travel to a disease-endemic area. We report on two patients who were admitted for treatment of ALA and then diagnosed as HIV infection. We also reviewed the etiology and characteristics of ALA in our hospital during the last 5 years.
Amebiasis ; Diagnosis ; Entamoeba histolytica ; HIV Infections ; HIV ; Humans ; Korea ; Liver Abscess ; Liver Abscess, Amebic ; Mass Screening

The diagnostic and treatment modalities of liver abscess have developed rapidly over the past few years but morbidity and mortality has not been markedly reduced. A total of 482 cases of liver abscess admitted to the Yonsei Medical Center over the past 20 years (Jan. 1971-Dec. 1990) were divided into 261 cases from the 1970s and 221 cases from the 1980s and the clinical and laboratory parameters were analyzed comparatively to determine if the clinical features, therapies and prognosis of liver abscess had changed. The proportion of amebic relative to pyogenic liver abscess decreased. Transbiliary infections increased in pyogenic liver abscess of the 1980s. Clinical signs such as jaundice and hepatomegaly and symptom duration before admission decreased. Abnormal laboratory features including hypoalbuminemia and elevation of alkaline phosphatase decreased and increased, respectively, in the 1980s. Ultrasonically guided percutaneous aspiration was the choice of treatment instead of surgical drainage in the 1980s. Despite diagnostic and therapeutic advances in the management of liver abscess, the prognosis has not improved in the 1980s as compared to the 1970s. This may reflect an increase in the incidence of liver abscess in old aged patients and patients with diabetes mellitus or underlying malignancy in the 1980s.
Adult ; Amebiasis/diagnosis ; Demography ; Drainage ; Female ; Human ; Incidence ; Liver Abscess/etiology/*pathology/physiopathology ; Male ; Mortality ; Serologic Tests ; Suppuration/microbiology

Amebiasis is an infectious disease caused by Entameba histolytica. Amebiasis remains an extremely important consideration in the differential diagnosis of diarrhea, especially when there is associated bleeding. It is imperative that appropriate studies to establish or exclude the diagnosis of amebiasis be carried out in all patients who present with a clinical and sigmoidoscopic picture of colitis, and that patients treated with metronidazole for amebiasis have adequate clinical and parasitological follow-up. We have experienced one case of intestinal amebiasis with protein losing enteropathy in 30month-old boy whose chief complaint was mild fever, vomiting and blood tinged diarrhea. His laboratory findings were compatible with protein losing enteropathy. The diagnosis of amebiasis is confirmed by observation of trophozoite of E. histolytica in the stools. A brief review with related literatures is also presented.
Amebiasis ; Colitis ; Communicable Diseases ; Diagnosis ; Diagnosis, Differential ; Diarrhea ; Dysentery, Amebic* ; Fever ; Follow-Up Studies ; Hemorrhage ; Humans ; Male ; Metronidazole ; Protein-Losing Enteropathies* ; Tolnaftate ; Trophozoites ; Vomiting

Soluble antigens from an axenic culture of Entamoeba histolytica were used to develop a commercial ELISA kit to quantify anti-E. histolytica antibodies in sera of patients with extraintestinal amebiasis in non-endemic settings. The diagnostic specificity and sensitivity of the test were assessed retrospectively using 131 human serum samples with amoebic serologic status available. They were selected according to their results in immunofluorescence (IFAT) and were separated in 2 sample categories: 64 sera with positive results by IFAT and 67 with negative results by IFAT. The sensitivity and specificity of the ELISA kit were assessed at 95.0% and 94.0% compared to the IFAT. The test can be useful to exclude a potential diagnosis of amebiasis and could be used as a screening method since ELISA is an automated technique.
Amebiasis ; Antibodies ; Axenic Culture ; Diagnosis ; Entamoeba histolytica ; Enzyme-Linked Immunosorbent Assay ; Fluorescent Antibody Technique ; Humans ; Mass Screening ; Methods ; Retrospective Studies ; Sensitivity and Specificity ; Serologic Tests

PURPOSE: Acute gastroenteritis (AGE) is a major cause of morbidity and remains a major cause of hospitalization. Following the Syrian refugee crisis and insufficient clean water in the region, this study reviews the etiological and epidemiological data in Lebanon. METHODS: We prospectively analyzed demographic, clinical and routine laboratory data of 198 children from the age of 1 month to 10 years old who were admitted with the diagnosis of AGE to a private tertiary care hospital located in the district of Nabatieh in south Lebanon. RESULTS: Males had a higher incidence of AGE (57.1%). Pathogens were detected in 57.6% (n=114) of admitted patients, among them single pathogens were found in 51.0% (n=101) of cases that consisted of: Entamoeba histolytica 26.3% (n=52), rotavirus 18.7% (n=37), adenovirus 6.1% (n=12) and mixed co-pathogens found in 6.6% (n=13). Breast-fed children were significantly less prone to rotavirus (p=0.041). Moreover, children who had received the rotavirus vaccine were significantly less prone to rotavirus (p=0.032). CONCLUSION: Our findings highlight the high prevalence of E. histolytica infection as the major cause of pediatric gastroenteritis in hospitalized children, during the summer period likely reflecting the insanitary water supplies and lack of hygiene. Moreover the 42.4% of unidentified causative pathogens should prompt us to widen our diagnostic laboratory arsenal by adopting new diagnostic technologies.
Adenoviridae ; Amebiasis ; Child ; Child, Hospitalized* ; Diagnosis ; Diarrhea ; Entamoeba histolytica ; Gastroenteritis* ; Hospitalization ; Humans ; Hygiene ; Incidence ; Lebanon* ; Male ; Prevalence ; Prospective Studies ; Refugees ; Rotavirus ; Tertiary Healthcare ; Water ; Water Supply

After bathing at a hot spring resort, a 75-year-old man presented to the emergency department because of seizure-like attack with loss of conscious. This is the first case of primary amebic meningoencephalitis (PAM) caused by Naegleria fowleri in Taiwan. PAM was diagnosed based on detection of actively motile trophozoites in cerebrospinal fluid using a wet-mount smear and the Liu's stain. The amoebae were further confirmed by PCR and gene sequencing. In spite of administering amphotericin B treatment, the patient died 25 days later.
Aged ; Amebiasis/*diagnosis/parasitology/*pathology ; Central Nervous System Protozoal Infections/*diagnosis/parasitology/*pathology ; Cerebrospinal Fluid/parasitology ; DNA, Protozoan/chemistry/genetics ; Fatal Outcome ; Humans ; Male ; Microscopy ; Naegleria fowleri/classification/genetics/*isolation & purification ; Polymerase Chain Reaction ; Sequence Analysis, DNA ; Taiwan