Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| frequency of entamoeba gingivalis in human gingival scrapings. | a survey was made of gingival scrapings stained by the papanicolaou method to assess the occurrence of entamoeba gingivalis, a nonpathogenic-oral amoeba. positive findings were recorded in 59% of 113 dental patients, and 32% of 96 healthy controls. these figures showed no significant changes during the last 20 years when compared with data published in 1960 and 1963. the existence of e. gingivalis and its rare appearance in the sputum should be known to cytologists because of the morphologic res ... | 1983 | 6881102 |
| sexual transmission of enteric protozoa and helminths in a venereal-disease-clinic population. | we examined the prevalence of enteric protozoan and helminthic infections and the associations between infection and gender, sexual preference, and sexual practices in 180 consecutive patients at a venereal-disease clinic. of 163 men, 29 were infected with one or more enteric parasites. none of the 17 women had an enteric infection. the prevalence of infections with entamoeba histolytica or giardia lamblia (or both) was 21.5 per cent in homosexual men, 6.2 per cent in bisexual men, and 0 in hete ... | 1981 | 6894964 |
| entamoeba histolytica. | 1980 | 6904006 | |
| toxocariasis in an institution for the mentally retarded. | a seroepidemiologic investigation was conducted in order to determine the cause of an apparent increase in rates of eosinophilia among 1400 institutionalized children during 1976-1977. the annual serologic survey during this period revealed 283 (20%) individuals with eosinophilia that exceeded 600 cells/cu mm of blood. during a five-month period in 1977, five patients who were hospitalized in adjacent wards developed acute pneumonia with eosinophilia. because laboratory tests of sputum, bone mar ... | 1981 | 6912220 |
| amebae resembling entamoeba gingivalis in the genital tracts of iud users. | a total of 2,252 vaginopancervical (fast) smears were studied as a continuation of an ongoing program to further investigate the occurrence of amebae in the genital tracts of women using intrauterine devices (iuds). of the 947 iud users, 1% harbored trophic amebae. no amebae, however, were found in any of the 1,164 smears from non-iud wearers. in all instances the amebae were associated with actinomyces. both organisms disappeared promptly after removal of the iud. in preparations stained accord ... | 1980 | 6933802 |
| amoebic liver abscess: clinical presentation and diagnosis. | the clinical profiles of 16 patients with amoebic liver abscesses referred to royal perth hospital over a ten-year period were assessed. the results indicate that amoebic abscess should be suspected in asian migrants and farmers, or patients who have travelled in endemic areas, who present with fever, anorexia, weight loss and abdominal pain. localized right hypochondriac tenderness, hepatomegaly and chest signs may be exhibited. the presence of anaemia, leucocytosis and marked elevation of the ... | 1980 | 6934768 |
| tropical infections contracted in papua new guinea and imported into western australia. | diseases contracted in papua new guinea (png) and observed in western australia (wa) have comprised malaria, amoebiasis, ancylostomiasis, filariasis and leprosy. this small series of cases demonstrates the prolongation of incubation periods of malaria following chemoprophylaxis, the spread of chloroquine-resistant strains of plasmodium falciparum (both to western and eastern regions of png), the ineffectiveness of chloroquine against entamoeba histolytica in the intestine and the value of oral p ... | 1981 | 6950604 |
| effect of immunosuppression on the size and metastasis of amoebic liver abscesses in hamsters. | the effect of t-cell depletion on experimental hepatic amoebiasis in hamsters was investigated. thymectomized and anti-t-cell (ats) treated animals as well as sham-operated and unoperated controls were inoculated intrahepatically, following laparotomy, at 7 weeks of age with 1 x 10(5) axenic trophozoites of entamoeba histolytica. in neonatally thymectomized hamsters the mean weight of the liver abscess 10 days post-inoculation was significantly greater than in neonatally sham-operated or unopera ... | 1981 | 6976549 |
| an epidemiological investigation of health risks related to solid waste salvage and recycling in an egyptian community. | this is the first report of an epidemiological cross-sectional study of solid waste scavengers, called zabaline, in egypt. the zabaline communities provide an important solid waste collection service throughout egypt's urban sector. their economic viability depends entirely on salvaging solid waste for recycling. intestinal parasites were common among the zabaline examined; 48% were found with one or more protozoan or helminth infections. either schistosoma haematobium or s. mansoni or both infe ... | 1982 | 6983749 |
| a seroepidemiological study of amebiasis in surinam by the enzyme-linked immunosorbent assay (elisa). | sera from nine populations in surinam, south america, were screened for antibodies against entamoeba histolytica by the enzyme-linked immunosorbent assay (elisa) technique and a precipitin test (gel diffusion or counterimmunoelectrophoresis). in two small surveys in 1974 and 1978, a high rate of clinically significant elisa titers was found in a rather isolated group of amerindians living near the brazilian border, predominately in the youngest age groups. amerindians living near the coast showe ... | 1980 | 6992607 |
| assessment of the sensitivity, specificity, and reproducibility of the indirect immunofluorescent technique for the diagnosis of amebiasis. | the indirect immunofluorescence (iif) test was used to study antibody titers to entamoeba histolytica in various manifestations of clinical amebiasis by comparing the results with parasitological and clinical data from confirmed cases. the sensitivity, specificity, and reproducibility of this test for diagnosis were also studied. a high degree of correlation was found between reactivity in the iif test and confirmed cases of amebic liver abscess. a positivity rate of 96% in sera of confirmed cas ... | 1981 | 7011073 |
| igg antibody to giardia lamblia detected by enzyme-linked immunosorbent assay. | a sensitive, reproducible enzyme-linked immunosorbent assay using unfixed, intact giardia lamblia trophozoites as antigen is described. employing this assay, we demonstrated that 81% of 59 symptomatic giardiasis patients and 12% of 17 uninfected control subjects had circulating igg antibodies to g. lamblia. eleven out of 15 patients tested serially had detectable antibody from 2 wk to 15 mo after therapy for acute infection. the prevalence of antibody in 197 unselected individuals in the washing ... | 1981 | 7014351 |
| prevalence of antibodies to parasitic infections in nigerian children. | sixty-six sera from nigerian children who attended a paediatric clinic at university college hospital, ibadan were tested with plasmodium falciparum, p. brazilianum, entamoeba histolytica, toxoplasma gondii and schistosoma mansoni antigens using indirect fluorescent antibody technique. these sera were tested using elisa technique for schistosoma antibodies. sera from all proven cases of infections gave positive results. highest antibody prevalence rate was for p. falciparum (69.6%), followed by ... | 1981 | 7017156 |
| travelers' diarrhea among american peace corps volunteers in rural thailand. | diarrheal disease was studied prospectively in 35 peace corps volunteers during their first five weeks in rural thailand. twenty (57%) developed the syndrome of travelers' diarrhea. recognized bacterial enteric pathogens were isolated from stools during 47% of 39 episodes of travelers' diarrhea. enterotoxigenic escherichia coli was isolated during 26% and shigella during 13% of the episodes. of the 20 volunteers, 50% had bacteriologic and/or serologic evidence of infection with enterotoxigenic e ... | 1981 | 7019355 |
| the etiology of anorectal infections in homosexual men. | the infectious etiology of symptomatic anorectal disease was studied in 52 homosexual men who did not have gonococci on initial gram stain of anorectal exudate. herpes simplex virus (hsv) was isolated from the anal canal or rectum in 15 of the 52 (29 percent) men and characteristically caused severe anorectal pain and focal ulcerations visible on sigmoidoscopy. despite negative initial gram stains, seven men (14 percent) had anorectal gonococcal infection. six (12 percent) had syphilis, includin ... | 1981 | 7025620 |
| cytologic detection of parasitic disorders. | parasitic diseases are common in developing countries; yet they are infrequently diagnosed in cytologic material. six cases are described where routine cytologic examination identified the parasites and suggested the diagnosis. there were three cases of entamoeba histolytica infection of the female genital tract and one each of hydatid cyst of the brain, strongyloides stercoralis infection of the lung and filarial infection of the urinary bladder. to our knowledge, cytologic diagnosis of hydatid ... | 1982 | 7048830 |
| vibrio parahaemolyticus: a major cause of travelers' diarrhea in bangkok. | travelers' diarrhea in bangkok, thailand was investigated in a group of 146 hotel guests who had diarrhea during their stay in the city. the identified pathogenic organisms were vibrio parahaemolyticus in 45 (31%), vibrio cholerae in 1, nonagglutinable vibrio in 1, and entamoeba histolytica in 3. identification of enterotoxigenic escherichia coli was not attempted. the study suggests that vibrio parahaemolyticus is a major cause of travelers' diarrhea in bangkok. | 1982 | 7058975 |
| amebic abscess of the liver: surgical aspects. | during the past five years, ten documented cases of hepatic amebic abscess have required surgical intervention at olive view hospital, van nuys, california. three of the patients underwent laparotomy when an hepatic abscess ruptured into the peritoneal cavity, and two required surgical intervention when an abscess invaded adjacent organs. another abscess continued to enlarge despite metronidazole therapy and still another became superinfected with bacteria. in the remaining three patients, surgi ... | 1982 | 7064468 |
| [diarrhea caused by parasites]. | the role of parasites as etiologic agents in diarrhea is emphasized. in countries of western europe, entamoeba histolytica and giardia lamblia are the most prevalent species, although some other 20 protozoans and helminths may lead to diarrheic disturbances. parasitology, pathogenesis, clinical signs, diagnosis and therapy are briefly outlined. the need for competence on the part of the personnel responsible for laboratory diagnosis is emphasized; also, newly developed immunodiagnostic methods m ... | 1982 | 7079687 |
| intestinal parasites in asymptomatic adult southeast asian immigrants. | all previous studies of intestinal parasites in southeast asian refugees have included immigrants with and without symptoms. in order to determine the prevalence of intestinal parasites in asymptomatic southeast asians, 226 adult refugees were studied who had no symptoms or signs suggestive of intestinal parasitism and who submitted one to three stools for examination. fifty-four percent of these asymptomatic adults were infected with one or more potential pathogens, 22 percent with ascaris, 20 ... | 1982 | 7108458 |
| attempts to immunize golden hamsters against entamoeba histolytica. | 1982 | 7125761 | |
| [parasitic infestation and haemoglobinopathies in a population of 1170 refugees from south east asia]. | one thousand one hundred and seventy refugees from cambodia, laos and vietnam were examined in the north of france from 1976 to 1980. 58% of them carried digestive parasites, 22% had anti-plasmodium antibodies and 2% showed circulating plasmodium. the most frequent parasites were hookworms (28%), opisthorchiidae (15%) and giardia intestinalis (12%). strongyloides stercoralis (5,7%), entamoeba histolytica (4,5%), tapeworms (3,3%), human coccidia (1,3%) and trichostrongylus sp. (1%) were less freq ... | 1982 | 7145655 |
| a seroepidemiological study of amebiasis in children of low socioeconomic level in maracaibo, venezuela. | sera collected from 606 children of low socioeconomic level attending the university and children's hospitals in maracaibo, venezuela, were screened for serologic evidence of entamoeba histolytica infection, employing the indirect hemagglutination test. the seropositivity rate was 7.7%. most of the positive sera showed low titers (1:128-1:256). the overall prevalence of positive reactors increased with age. stool examinations done on 516 children revealed cysts or trophozoites of e. histolytica ... | 1982 | 7149096 |
| [use of ultrasound, ultrasound-directed fine needle puncture and aspiration in amebic abscess of the liver. case report and short overview]. | case report on a 48-year-old swiss male living in burundi who suddenly fell ill with vomiting and anorexia, followed by pappy stools, weakness and impotence. he presented with hepatomegaly, while sedimentation rate and alkaline phosphatase were both elevated. stool examination revealed cysts and vegetative forms of entamoeba histolytica, while amebic serology was negative. treatment with ornidazole and later with diloxanide furoate was given. sonography showed two cystoid areas in the right lobe ... | 1982 | 7156963 |
| seroepidemiology of amoebiasis in the villagers in phichit province and urban slum dwellers in bangkok, thailand. | a serological survey was conducted in the villages of phichit province, northern region and in the urban slum communities in bangkok to determine whether amoebiasis was endemic in the areas and to determine the prevalence rates. six rural villages, ethnically and culturally alike with a population of 3,019 and two urban slums with a population of 1,510 were surveyed. sera were tested for indirect hemagglutination antibody (iha) to entamoeba histolytica and the stools examined for the parasite by ... | 1982 | 7170636 |
| altered lipid profile in liver amoebiasis and its emendation with metronidazole treatment. | liver amoebic abscess was produced by introducing 16,000 trophozoites of entamoeba histolytica directly into the livers of growing hamsters. a group of the infected animals received orally 64 mg metronidazole/kg body weight for 5 days from the day of the infection. the treated group was autopsied 7 or 14 days after the treatment. histologically, liquefaction of large parenchymal areas and biochemically, elevation in cholesterol, triglycerides, bile acids and decrease in phospholipids were observ ... | 1982 | 7174072 |
| amebic perforation of the colon. | acute necrotising colitis and perforation of the colon due to amebic infection is usually fatal. only three patients in the present series of nine survived surgery. preoperative diagnosis was not possible and because of an extremely friable, blotting paper like colon, this condition was only suspected at laparotomy. examination of ulcer scrapings for the presence of entamoeba histolytica or histopathology is confirmatory. resection anastomosis is mandatory as less extensive local procedures or b ... | 1982 | 7183622 |
| [contribution to the knowledge of intestinal protozoa infestation in the hospital population of barcelona (author's transl)]. | this report concerns the analysis of 650 fecal samples submitted for parasitic investigation to the microbiology service of the hospital de la santa creu i sant pau of barcelona. the samples were analyzed by the technique of fixation and direct observation of sapero and lawless (mifd), and with the biphasic concentration method of blagg et al (mifc). intestinal protozoa were detected in 183 samples (28.2%), with a total of 232 protozoosis uncovered. the specific analysis gave the following resul ... | 1981 | 7206888 |
| intestinal and blood parasites in the torro valley, central sulawesi, indonesia. | approximately 300 blood and fecal specimens were examined in a parasitologic survey of indigenous inhabitants of the small isolated torro valley in the mountains of central sulawesi. schistosoma japonicum was not found although the parasite is endemic in the neighboring lindu and napu valleys. hookworm infection (71%) was the most common helminthiasis. the prevalences of ascariasis (3%) and trichuriasis (2%) are low for indonesia in general but similar to those found in nearby mountainous areas ... | 1980 | 7221687 |
| intestinal parasites of man in northern bohol, philippines, with emphasis on schistosomiasis. | a survey for intestinal parasites with emphasis on oriental schistosomiasis was conducted in the townships of trinidad and talibon, bohol province, philippines and approximately 1,700 stool samples were examined. schistosoma japonicum is still endemic to these areas of northern bohol but infection rates were much lower than expected, 5% rather than 30%. soil-transmitted helminths were the most common parasitic infections. hookworms were found in 71% of the samples tested, most infections were du ... | 1980 | 7221688 |
| autochthonous amoebic liver abscess in germany. | a liver abscess was diagnosed by sonography and surgery in a sewer-man who had never left germany 14 weeks after he fell into a clearing basin and swallowed sewage. the causative agent of the abscess was confirmed immunologically to be entamoeba histolytica. | 1980 | 7233537 |
| intestinal parasites of man in oriental mindoro, philippines, with emphasis on schistosomiasis. | an intestinal parasite survey was conducted in the town of victoria, oriental mindoro, philippines in 1978 in order to estimate the current schistosomiasis situation in this area of the philippines and schistosoma japonicum eggs were detected in 20% of 1058 fecal specimens examined. the prevalence was more than twice as high as had been previously estimated. infection rates were higher in males than in females, 26 versus 15% and age-wise were infrequent in young children (8%) and moderately comm ... | 1981 | 7256349 |
| intestinal parasites of man in bukidnon, philippines, with emphasis on schistosomiasis. | a total of 831 fecal specimens from malay-balay, mindanao, philippines were examined for schistosomiasis and common intestinal parasites. schistosoma japonicum eggs were found in 16% of the samples. infections were more common in males (20%) than in females (12%). age-wise, infections were infrequently diagnosed in children less than 10 years and infections in older age groups varied from 12-27%. hookworm, chiefly necator americanus, was the most common parasite found (44%) followed by ascaris l ... | 1981 | 7256354 |
| amoebiasis in an urban black population. | amoebiasis is a common cause of dysentery and liver abscess at baragwanath hospital, johannesburg. forty-eight adult patients with amoebiasis were diagnosed during the 8-month period 1 december 1979 to 31 july 1980. there was a high incidence of extra-intestinal complications (38%) and a high mortality rate (12.5%) in this series. the importance of early surgery in fulminating dysentery which has not responded to amoebicidal therapy is emphasized. the need for early diagnosis is crucial, since f ... | 1981 | 7256469 |
| intestinal amoebiasis for 36 years. | a case is reported of amoebic dysentery in a former soldier who had symptoms of entamoeba histolytica infection for 36 years. it emphasizes the need for careful search for parasites in the stools of any patient with bowel symptoms because the consequences of wrong diagnosis are potentially catastrophic. | 1980 | 7267487 |
| effect of specific and non-specific prior sensitization on the outcome of amoebic infection. | guinea-pigs were sensitized with monoaxenic amoebic antigen (group i), bacterial associate antigen (group ii) and axenic amoebic antigen (group iii). all animals in group i, 95% in group ii and 70% in group iii, developed caecal lesions on intra-caecal inoculation of entamoeba histolytica trophozoites; 92.8% of control (unsensitized) animals developed lesions in their caeca. lesions were more severe in sensitized animals than in controls. hepatic abscesses were found in 7.6% of group i, 11.1% of ... | 1981 | 7268861 |
| [epidemiological studies, with the direct and immunodiagnostic method, of parasitic diseases in residents of a somalia village located in the irrigated zones]. | the authors carried out an epidemiological survey for the evaluation of the incidence of the parasitoses in a somali village localized in proximity to a watercourse. they found parasites in the 72,53% of the examined population: schistosoma haematobium 42.5%, ascaris lumbricoides 32%, ancylostoma duodenale 14%, entamoeba histolytica 7,5%. the immunofluorescence, nevertheless, showed the presence of antiparasite antibodies in a much higher percentages of cases; it could meant that the real incide ... | 1980 | 7312395 |
| intestinal protozoan infections: prevalence in the san francisco bay area. | a sample of 415 members of the kaiser foundation health plan (kfhp) were tested for intestinal protozoa. this parasite survey group was found to be comparable in age distribution, sex and ethnic background with the membership at large. gastrointestinal complaints were no more numerous in this group than in a large series of kfhp members taking multiphasic examinations. because kfph membership included, at the time of the survey, approximately 27 percent of all residents of the san francisco bay ... | 1981 | 7340117 |
| an ecological interdependence of diet and disease? a study of infection in one tribe consuming two different diets. | the nature and incidence of infections were studied in two groups of turkana living in the same area but eating different diets; one consumed milk only and the other a combination of fish and milk. the only apparent and significant nutritional difference between the two groups was mild iron deficiency in the milk drinkers. episodes of fever, symptomatic infection with malaria and brucellosis, molluscum contagiosum and common warts, episodes of diarrhea, and serological evidence of infection with ... | 1980 | 7355850 |
| antiamebic amidines and sulfonamides of 5- and 6-amino-2,3-bis(4-alkyl-1-piperazinyl)quinoxalines. | a series of amidines and sulfonamides of 5- and 6-amino-2,3-bis(4-alkyl-1-piperazinyl)quinoxalines was synthesized and tested against cecal and hepatic forms of entamoeba histolytica infections in rats and hamsters, respectively. four compounds (5, 6, 8, and 9) were found to have acceptable activity against infections in both species but were too toxic to be considered for use in man. | 1980 | 7359534 |
| extraintestinal amebiasis in infancy: report of three patients and epidemiologic investigations of their families. | three infants (aged 6 weeks, 7 weeks, and 10 months) had severe entamoeba histolytica infections characterized by colitis, hepatic abscesses, and peritonitis. the two younger children died after fulminant illnesses while the third recovered. diagnosis was delayed in all three children by a low index of suspicion and negative stool examinations for parasites. epidemiologic investigations of the infants' families revealed a high prevalence of amebic infections and elevated antibody titers to e his ... | 1980 | 7367088 |
| cytopathogenicity of entamoeba histolytica: hemolytic activity of trophozoite homogenates. | in in vitro assays the hemolytic activity of total homogenates of trophozoites of seven strains of amebae were tested for specificity and potency against the erythrocytes of eight mammalian species. the species of entamoeba included in the tests were e. histolytica, e. invadens, e. moshkovskii, and the laredo type of e. histolytica. the hemolytic activity was found to be dose-dependent and strain-specific, with e. histolytica being generally the species having the highest hemolytic potency. | 1980 | 7369439 |
| amoebic abscess in the cirrhotic liver. | though amoebic liver abscess and liver cirrhosis occur very commonly in hospital practice in the tropics, they have not to the knowledge of the present authors hitherto been reported to occur simultaneously in the same patient. the patient described here, who had clear-cut clinical and histological features of chronic liver cirrhosis with portal hypertension and ascites, presented somewhat acutely with liver pain and an amoebic liver abscess that contained 'chocolate sauce' on needle aspiration. ... | 1980 | 7380340 |
| shigellosis in the marshall islands: epidemiologic aspects of an outbreak. | an outbreak of diarrheal illness caused by shigella flexneri 1b and associated with 11 deaths occurred in the marshall islands during june and july 1977. a house-to-house survey on majuro indicated an attack rate of 6.2%. neither the survey nor a case-control study uncovered a common source of exposure on majuro, and it is believed that transmission was mainly person-to-person. socioeconomic factors, type of water supply, distance to municipal water supply, and type of sanitary facility could no ... | 1980 | 7386724 |
| the salutary effect of milk on amoebiasis and its reversal by iron. | observations among milk-drinking african nomads showed an unusual freedom from infection with entamoeba histolytica compared with similar nomads taking a mixed diet. a controlled study among maasai pastoralists showed that the administration of iron to correct their dietary iron deficiency sharply increased their susceptibility to amoebiasis. examination of the milk of their zebu cattle showed that it not only had a concentration of iron below the minimum necessary for the growth of e histolytic ... | 1980 | 7388537 |
| [frequency and significance of parasitic infections in refugees from vietnam (author's transl)]. | in the course of the medical care which is provided for the refugees from southeast asia 100 persons were tested for intestinal parasites (helminths and protozoa). in addition serum samples were obtained from 72 of these and tested in several tests (cft, fat, iha and sft) using antigens of entamoeba histolytica, leishmania donovani, toxoplasma gondii, schistosoma spp., fasciola hepatica, echinococcus spp., trichinella spiralis and litomosoides carinii. in 49 persons infections with one, two or ... | 1980 | 7395245 |
| lysosomal enzymes in axenically grown entamoeba histolytica nih-200 passaged through cholesterol. | 1980 | 7399589 | |
| intestinal parasitic infections in homosexual men: prevalence, symptoms and factors in transmission. | in a controlled study 67.5% of 200 homosexual men but only 16% of 100 heterosexual men were found to be infected with intestinal parasites. entamoeba histolytica was isolated from 27% of the homosexual and 1% of the heterosexual men, and giardia lamblia was isolated from 13% of the homosexual and 3% of the heterosexual men. the presence of symptoms could not be correlated with infection except when the infection was caused by more than one organism, including g. lamblia. symptoms were much more ... | 1980 | 7437971 |
| human parasitoses in bali, indonesia. | a survey of intestinal and blood parasites of man was conducted on the island of bali, indonesia in 1974. a total of 270 stool specimens from three villages were examined. both ascaris lumbricoides and trichuris trichiura were found in more than 90% of those examined, and hookworm eggs in 59%. other intestinal helminth and protozoan parasites found were: enterobius vermicularis, entamoeba histolytica, entamoeba coli, endolimax nana, and iodamoeba bütschlii. taeniid proglottids, hymenolepis dimin ... | 1980 | 7444572 |
| human intestinal parasites in karakuak, west flores, indonesia and the effect of treatment with mebendazole and pyrantel pamoate. | a survey for intestinal parasites and mass-treatment with a combination of mebendazole and pyrantel pamoate were conducted in karakuak, west flores in 1977. a total of 198 stool specimens from 104 males and 94 females ranging in age from less than 1 to 70 years were examined and 72% harbored one or more intestinal parasites. ascaris lumbricoides (43%) and entamoeba histolytica (21%) were the most common, followed by entamoeba coli (19%), hookworm (18%), iodamoeba bütschlii (8%), giardia lamblia ... | 1980 | 7444573 |
| entamoeba histolytica infection in male homosexuals. | amoebic infection in two male homosexuals is described. the possibility that this infection was acquired through homosexual practices and the implications to clinical and diagnostic services is discussed. | 1980 | 7461471 |
| intestinal parasites among indochinese refugees and mexican immigrants resettled in contra costa county, california. | stool examinations of 186 indochinese refugees and 90 immigrants from mexico resettled in contra costa, county, california, have shown that 60 percent of refugees and 39 percent of immigrants are infected with one or more species of pathogenic protozoa and helminths. the mean prevalences of infections among refugees and immigrants, respectively, were: hookworms, 25 and 2 percent; whipworm, 22 and 12 percent; ascaris, 20 and 12 percent; giardia lamblia, 11 and 11 percent; strongyloides, 9 and 1 p ... | 1981 | 7462932 |
| parasitic disease control in a residential facility for the mentally retarded: failure of selected isolation procedures. | asymptomatic infection with either entamoeba histolytica or giardia lamblia was found in 60 per cent of the residents in an institution for the mentally retarded one year after eradication of these parasites. the residents were then segregated into infected and noninfected groups and drug therapy was again successfully undertaken. the two groups remained separated except during periods of play. a one-year follow-up showed that both study and control groups were equally infected. the failure of s ... | 1981 | 7468867 |
| ultrasonography and amoebic liver abscesses. | twenty-four patients were admitted to kasr-el-aini hospital with suspected diagnoses of amoebic liver abscesses. the patients underwent clinical examinations, stool specimen analyses for cysts and trophozoites of entamoeba histolytica, radiologic examinations, and routine liver function tests. in one patient, a liver scintiscan was obtained. ultrasonographic examination was performed on all patients using the gray scale imaging technique. in 20 patients, the diagnoses of amoebic liver abscesses ... | 1981 | 7469556 |
| [cellular behavior of axenic amebas cultured in the presence of different carbohydrates]. | carbohydrates are an essential requirement of the culture medium in many cells. axenic cultures of amebas require a concentration of 0.5 to 1.0 per cent glucose. the purpose of this work is to demonstrate possible differences on the carbohydrates requirements between pathogenic and nonpathogenic amebas strains. the experimental work was done in two phases: a) observation of the cultures growing at different concentrations of glucose in tp-s-1 medium (0, 0.25, 0.50, 1.0 and 2.0 g/100 ml), and b) ... | 1980 | 7469636 |
| effect of complement depletion on the induction of amebic liver abscess in the hamster. | complement depletion in the hamster by cobra venom factor (cof) gives a higher frequency and severity of lesions after intrahepatic inoculation of entamoeba histolytica. the cof-treatment does not alter the humoral immune response to amebae, indicating that its effect on the amebic liver abscess is not due to suppression of the immune response but rather to its effect on complement levels at the time of the protozoal infection. | 1980 | 7469638 |
| [sequential study of the invasion of the colonic mucosa by entamoeba histolytica]. | 1980 | 7469640 | |
| effect of single dose of secnidazole in treatment of intestinal amoebiasis. | 1995 | 7474292 | |
| galactose-specific adhesion mechanisms of entamoeba histolytica: model for study of enteric pathogens. | 1995 | 7476406 | |
| purification and characterization of galactose- and n-acetylgalactosamine-specific adhesin lectin of entamoeba histolytica. | 1995 | 7476421 | |
| sequence and organization of an unusual histone h4 gene in the human parasite entamoeba histolytica. | 1995 | 7477106 | |
| stable episomal transfection of entamoeba histolytica. | 1995 | 7477110 | |
| disaccharidase deficiencies in mongolian gerbils (meriones unguiculatus) protected against giardia lamblia. | the activities of the disaccharidases lactase, maltase, sucrase and trehalase were examined in gerbils during giardia lamblia infections. in a primary infection with trophozoites, the activities of all four enzymes were reduced from day 10 post-infection (p.i.) and remained at low levels well past the elimination phase of the infection. however, during a challenge infection, the disaccharidase decreases were short-lived, with impairments being seen only on days 2 and/or 4 post-challenge (p.c.). ... | 1995 | 7479650 |
| effects of chaparrin, nordihydroguaiaretic acid and their structural analogues on entamoeba histolytica cultures. | 1995 | 7479999 | |
| in vitro cytotoxicity of chaparrin from castela texana. | 1995 | 7480018 | |
| immunogenicity of the recombinant serine rich entamoeba histolytica protein (srehp) amebiasis vaccine in the african green monkey. | we report the first study in non-human primates of the safety and immunogenicity of a recombinant vaccine designed to prevent amebic liver abscess. in a pilot study, a recombinant vaccine containing the serine rich entamoeba histolytica protein (srehp) attached to a maltose binding protein (srehp/mbp), which has been shown to be effective in preventing amebic liver abscess in rodent models of infection, was used to immunize two african green monkeys. vaccination with srehp/mbp resulted in no sys ... | 1995 | 7483769 |
| community survey of diarrhoea in children under 5 years in kinshasa, zaire. | this community based survey was undertaken to assess the prevalence, characteristics and risk factors of diarrhoea in children < 5 years of age in an urban zone, at kinshasa, zaire. 155 community cases selected by cluster sampling, 155 age-matched controls, and 18 children with diarrhoea seen at a health centre (hc) were examined. the diarrhoea prevalence rate was 6.5%. the highest risk of persistent diarrhoea was in children of 2 to 3 years, non breast-fed, with more than one enteric agent in t ... | 1995 | 7487197 |
| yi-s, a casein-free medium for axenic cultivation of entamoeba histolytica, related entamoeba, giardia intestinalis and trichomonas vaginalis. | pancreatic digests of casein are major ingredients of media used in the axenic cultivation of lumen-dwelling parasitic protozoa, especially entamoeba, giardia, and trichomonads. the digest used almost exclusively in the development of these media, medo-peptone (trypticase bbl), has not been available since 1981. moreover, none of dozens of similar type digests tested since then in our laboratory has proved equal to medo-peptone, and in the last two years it has become increasingly difficult to o ... | 1995 | 7496385 |
| dose- and time-dependent ultrastructural and functional lesions of the colonic mucosa by entamoeba histolytica lysates. | 1995 | 7502821 | |
| electrophysiologic and morphologic effects of entamoeba histolytica lysates on rabbit colon. | 1995 | 7502932 | |
| specific antiamebic serum antibodies in mexican puerperae and their newborns. | 1995 | 7502933 | |
| specific anti-e. histolytica iga monoclonal antibodies. | 1995 | 7502936 | |
| molecular mechanisms of invasion by entamoeba histolytica. | amebiasis is the third leading cause of death due to parasitic disease. adherence to and contact-dependent killing of host cells requires the galactose-inhibitable lectin, a heterodimeric glycoprotein composed of heavy and light subunits. the cysteine-rich extracellular domain of the heavy subunit has identity with beta 1 integrins, complement receptor cd59, and complement components c8 and c9; the light subunit sequence is unlike any other sequenced protein. monoclonal antibodies to the cystein ... | 1993 | 7504959 |
| invasion and metastasis mechanisms in entamoeba histolytica and cancer cells. some common cellular and molecular features. | 1994 | 7510034 | |
| cd59 (protectin) molecule, resistance to complement, and virulence of entamoeba histolytica. | 1994 | 7512288 | |
| the pore-forming peptide of entamoeba histolytica, the protozoan parasite causing human amoebiasis. | amoebapore, the pore-forming peptide of e. histolytica has been isolated and its structure elucidated on the cdna and protein level. the peptide is composed of 77 amino acid residues including six cysteine residues and has a molecular mass of 8244 da. the primary translation product contains a signal sequence of 21 mostly hydrophobic amino acid residues. the active peptide has been located in the cytoplasmic granules of the amoebae. circular dichroism spectroscopy revealed an all alpha-helical c ... | 1994 | 7512763 |
| tumor necrosis factor alpha augments nitric oxide-dependent macrophage cytotoxicity against entamoeba histolytica by enhanced expression of the nitric oxide synthase gene. | nitric oxide (no measured as nitrite, no2-) is the major effector molecule produced by activated macrophages for in vitro cytotoxicity against entamoeba histolytica trophozoites. in this study, we determine whether tumor necrosis factor alpha (tnf-alpha) produced by activated bone marrow-derived macrophages (bmm) is involved in the induction of the inducible no synthase gene (mac-nos) for no-dependent amebicidal activity. tnf-alpha alone did not directly induce macrophage no2- production to kill ... | 1994 | 7513301 |
| short report: detection of entamoeba histolytica and e. dispar directly in stool. | current diagnosis of entamoeba histolytica infection requires the direct microscopic identification of the parasite, a technique that is insensitive and cannot distinguish pathogenic e. histolytica from noninvasive e. dispar. enzyme-linked immunosorbent assay (elisa) antigen detection tests were developed to distinguish e. histolytica from e. dispar infection in stool specimens. the elisa result for e. histolytica antigen was positive in 26 of 27 e. histolytica-positive stool specimens, three of ... | 1994 | 7515594 |
| pore-forming peptide of entamoeba histolytica. significance of positively charged amino acid residues for its mode of action. | amoebapore is a 77-residue pore-forming peptide from entamoeba histolytica with antibacterial and cytolytic properties. it contains eight lysine residues and one histidine residue. chemical modifications of amoebapore with various reagents affecting either both types of cationic residues or lysine and histidine residues separately resulted in virtually complete loss of pore-forming activity. the activity was restored by reversal of modifications. whereas amoebapore was no longer capable of bindi ... | 1994 | 7525351 |
| entamoeba histolytica modulates the nitric oxide synthase gene and nitric oxide production by macrophages for cytotoxicity against amoebae and tumour cells. | nitric oxide (no) is the major cytotoxic molecule produced by activated macrophages for cytotoxicity against entamoeba histolytica trophozoites. in the present study, we determined whether e. histolytica infection and soluble amoebic proteins affected macrophage cytotoxicity against amoebae and tumour cells by modulating the inducible no synthase gene (inos) and no (measured as nitrite, no2-) and tumour necrosis factor-alpha (tnf-alpha) production. amoebic liver abscess-derived macrophages [days ... | 1994 | 7533135 |
| evaluation of lacto-phenol cotton blue for wet mount preparation of feces. | the use of lacto-phenol cotton blue (lpcb) stain for wet mount preparation of stools to demonstrate intestinal parasites by routine microscopy was evaluated in this study. lpcb-stained trophozoites and cysts and helminthic ova could easily be detected and identified in lpcb wet mounts of stools. the stain is recommended for routine use in the wet mount preparation of stools in a parasitology laboratory. | 1995 | 7540624 |
| amebiasis. | 1995 | 7548493 | |
| ancient weapons: nk-lysin, is a mammalian homolog to pore-forming peptides of a protozoan parasite. | 1995 | 7553868 | |
| [in vivo experimental models of amebiasis]. | in vivo experimental models for amebiasis have provided important information about the mechanisms of host-parasite interaction which determine the production of disease. in the laboratory, several species of rodents have been used to study the intestinal and hepatic amebiasis. for the former, the model of "washed-closed cecal loop" in guinea-pig and hamster has been useful to study the early invasive events. in gerbils we also produced early intestinal lesions by intracecal inoculation with mon ... | 1994 | 7557059 |
| transforming growth factor-beta 1 primes macrophages for enhanced expression of the nitric oxide synthase gene for nitric oxide-dependent cytotoxicity against entamoeba histolytica. | nitric oxide (no) produced by activated macrophages is the major cytotoxic molecule for in vitro cytotoxicity against entamoeba histolytica trophozoites. transforming growth factor-beta 1 (tgf-beta 1) is a potent negative regulator of several macrophage functions, including no production. in this study, we investigated the effect of tgf-beta 1 on macrophage nitric oxide synthase (mac-nos) mrna expression and no production for macrophage cytotoxicity against e. histolytica trophozoites. tgf-beta ... | 1995 | 7558128 |
| t-cell suppression and selective in vivo activation of th2 subpopulation by the entamoeba histolytica 220-kilodalton lectin. | a 220-kda surface protein (l220) with lectin activity from entamoeba histolytica trophozoites has been characterized previously (j. l. rosales-encina, i. meza, a. lópez-de-león, p. talamás-rohana, and m. rojkind, j. infect. dis. 156:790-797, 1987). this molecule is involved in the adhesion process (i. meza, f. cázares, j. l. rosales-encina, p. talamás-rohana, and m. rojkind, j. infect. dis. 156:798-805, 1987) and is very immunogenic. in this work, we studied both the humoral and the cellular imm ... | 1995 | 7558304 |
| interaction of laminin with entamoeba histolytica cysteine proteinases and its effect on amebic pathogenesis. | the entamoeba histolytica 27-kda cysteine proteinases exhibit striking binding specificities for immobilized laminin over other components of the extracellular matrix, such as collagen and fibronectin. inactivation of the proteinase with the active-site inhibitor l-trans-epoxysuccinyl-leucylamido(4-guanidino)butane abolishes laminin binding by the enzyme, and conversely, laminin inhibits cleavage of a fluorogenic dipeptide substrate of the amebic cysteine proteinase, suggesting that the substrat ... | 1995 | 7558332 |
| intestinal amebiasis: cyclic suppression of the immune response. | the cellular immune response was evaluated in a c3h/hej mouse model of intestinal amebiasis at 5-60 days postinoculation with entamoeba histolytica. at various intervals, spleen lymphocytes were obtained from infected and noninfected control mice and cultured with concanavalin a (con a), pokeweed mitogen (pwm), or ameba antigen. e. histolytica infection induced a cyclic depression of dna synthesis when spleen lymphocytes were stimulated with a t-cell mitogen (con a), a t- and b-cell (pwm) mitoge ... | 1995 | 7567905 |
| transfection and continuous expression of heterologous genes in the protozoan parasite entamoeba histolytica. | to provide tools for functional molecular genetics of the protozoan parasite entamoeba histolytica, we investigated the use of the prokaryotic neomycin phosphotransferase (neo) gene as a selectable marker for the transfection of the parasite. an escherichia coli-derived plasmid vector was constructed (pa5'a3'neo) containing the neo coding region flanked by untranslated 5' and 3' sequences of an ent. histolytica actin gene. preceding experiments had revealed that amoebae are highly sensitive to t ... | 1995 | 7568055 |
| a nuclear gene of eubacterial origin in euglena gracilis reflects cryptic endosymbioses during protist evolution. | genes for glycolytic and calvin-cycle glyceraldehyde-3-phosphate dehydrogenase (gapdh) of higher eukaryotes derive from ancient gene duplications which occurred in eubacterial genomes; both were transferred to the nucleus during the course of endosymbiosis. we have cloned cdnas encoding chloroplast and cytosolic gapdh from the early-branching photosynthetic protist euglena gracilis and have determined the structure of its nuclear gene for cytosolic gapdh. the gene contains four introns which pos ... | 1995 | 7568085 |
| prevalence and pathogenicity of entamoeba histolytica in three different regions of pernambuco, northeast brazil. | parasitological examinations were carried out on 663 individuals of three different cities of pernambuco state, northeastern brazil: recife, palmares and bodocó. the population from a drought area of pernambuco state, bodocó, was investigated for amoebiasis and compared with recife, metropolitan city (about 1.3 million of inhabitants) and another inland community, palmares, located inside of the sugar-cane plantation region of the state. no evidence of invasive strains of e. histolytica were fou ... | 1994 | 7569626 |
| entamoeba histolytica: detection of coproantigens by purified antibody in the capture sandwich elisa. | a sensitive and specific capture sandwich elisa (cse) was developed using polyclonal purified rabbit antibodies against three different axenic strains of entamoeba histolytica: csp from brazil and hm1 - imss from mexico, for the detection of coproantigens in fecal samples. immunoglobulin g (igg) against e. histolytica was isolated from rabbits immunized with throphozoites whole extract in two stages: affinity chromatography in a column containing e. histolytica antigens bound to sepharose 4b was ... | 1994 | 7569629 |
| prevalence of intestinal parasitic infection in five farms in holambra, são paulo, brazil. | a parasitological survey was carried out on 222 inhabitants of five farms in holambra, located 30 km north of campinas, são paulo, brazil, on october 1992. approximately 70% of the inhabitants were found to be infected with at least one species of intestinal parasite. the positive rates of 6 helminths and 7 protozoan species detected are as follows: 5.4% ascaris lumbricoides; 8.6% trichuris trichiura; 19.8% necator americanus; 10.4% strongyloides stercoralis; 1.4% enterobius vermicularis; 0.9% h ... | 1995 | 7569635 |
| comparison of two media for the isolation and short-term culture of entamoeba histolytica and e. dispar. | 1995 | 7570875 | |
| transmission of entamoeba histolytica within a family complex. | a limited outbreak of symptomatic intestinal and extraintestinal amoebiasis within a family complex is described. the infection was almost certainly transmitted by a philippino housemaid, who was an asymptomatic carrier of entamoeba histolytica infection acquired in her native country. starch-gel electrophoresis showed isoenzyme patterns characteristic of pathogenic zymodeme xix in all the amoebic isolates. | 1995 | 7570880 |
| [viruses of parasitic protozoa]. | the authors present the actual review on several publications concerning the molecular characterizations of the viruses found in parasitic protozoa such as giardia, trichomonas, leishmania and entamoeba histolytica. all of the rna viruses observed in parasitic protozoa showed several similarities and did not considerably differ from the viruses found in simple eukaryotic cells; they closely correspond to dsrna viruses of yeast. the supposition that the protozoan symbionts detected in laboratorie ... | 1995 | 7571630 |
| [histological and histochemical investigations of large and small intestine in guinea pigs infected by entamoeba histolytica]. | in order to gain better knowledge about pathomechanisms of amebiasis, histological and histochemical studies were performed on large and small intestine of guinea pigs infected by ps-2 entamoeba histolytica strain. results of these studies showed that the presence of e. histolytica in large intestine caused also pathomorphological changes of small intestine: partial atrophy of villi, epithelium destruction, epithelial metaplasia, lacteral dilation, infiltration of mucous membrane by lymphocytes, ... | 1995 | 7571633 |
| alcohol dehydrogenase: multiplicity and relatedness in the solvent-producing clostridia. | alcohol dehydrogenase (adh) is a key enzyme for the production of butanol, ethanol, and isopropanol by the solvent-producing clostridia. initial studies of adh in extracts of several strains of clostridium acetobutylicum and c. beijerinckii gave conflicting molecular properties. a more coherent picture has emerged because of the following results: (i) identification of adhs with different coenzyme specificities in these species; (ii) discovery of structurally conserved adhs (type 3) in three sol ... | 1995 | 7576768 |
| elucidation of the dna synthetic cycle of entamoeba spp. using flow cytometry and mathematical modeling. | we developed a method to study the dna synthetic cycles of entamoeba histolytica and entamoeba invadens by flow cytometry (fcm) based on a preparative procedure to reduce both high levels of natural fluorescence and non-specific adsorption of fluorochromes. we modeled g1, s, and g2 phases as a series of overlapping gaussian curves. both e. histolytica and e. invadens displayed g1, s, and g2 proportions that are consistent with eukaryotic cell populations in exponential or stationary growth phase ... | 1995 | 7581336 |
| lipophosphoglycan is present in distinctly different form in different entamoeba histolytica strains and absent in entamoeba moshkovskii and entamoeba invadens. | lipophosphoglycan has recently been demonstrated on the cell surface of entamoeba histolytica strain hm-1:imss. a monoclonal antibody against this molecule had failed to react with some other strains of e. histolytica, including the strain rahman. to determine if a structurally distinct lipophosphoglycan existed in rahman, [3h]galactose-labeled glycoconjugates were electrophoresed through sodium dodecyl sulfate polyacrylamide gel electrophoresis. the electrophoretic pattern in rahman was very di ... | 1995 | 7581337 |