Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| antibodies to entamoeba histolytica in patients with rheumatoid arthritis. | 1985 | 2868552 | |
| differences in adhesion, phagocytosis and virulence of clones from entamoeba histolytica, strain hm1:imss. | 1985 | 2869003 | |
| assessment of validity of counterimmunoelectrophoresis and elisa in the routine diagnosis of amoebiasis. | counterimmunoelectrophoresis (cie) was used to detect antibodies against entamoeba histolytica in 99 sera from amoebiasis suspected patients using antigens from the hk-9 and ht-12 strains of axenically cultivated e. histolytica. there was no significant difference of seropositive rates using antigens from these two strains suggesting the both strains were equally suitable for use in the routine cie test for the diagnosis of amoebiasis. in comparison with elisa, the cie test was a little less sen ... | 1985 | 2869587 |
| primates as a source of entamoeba histolytica, their zymodeme status and zoonotic potential. | a survey of 17 species of non-human captive primates in quebec, canada, revealed that 40% of the animals were infected with the protozoan entamoeba histolytica. isoenzyme analysis of lysates prepared from cultured amebic isolates showed them to belong to either a zymodeme iii or viii, and therefore, characteristic of non-pathogenic strains of e. histolytica from humans. these isolates were also of low virulence in gerbil ceca. serum samples from infected and uninfected primates had negative titr ... | 1985 | 2869116 |
| failure to establish experimental entamoeba histolytica infection in mongolian gerbils (meriones unguiculatus) naturally infected with entamoeba muris. | 1985 | 2870571 | |
| use of periodate activated sepharose 4b immunoadsorbent in purification of anti entamoeba histolytica antibody. | 1985 | 2870982 | |
| coproantibody study in entamoeba histolytica, entamoeba hartmanni and other parasitic infections. | 1985 | 2870983 | |
| amoebic pericarditis. | 1985 | 2871111 | |
| [asymptomatic parasitic infection in infants under 6 months]. | 1985 | 2873630 | |
| mitogenic factor for t inducer/helper cells in entamoeba histolytica extracts. | 1985 | 2882454 | |
| the effect of splenectomy on resistance of mice to entamoeba histolytica infection. | the role of the spleen in amoebic infection was examined in mice, using strains selected as being either genetically-susceptible (c57bl/6) or genetically-resistant (a/j) to amoebiasis. splenectomized and sham-operated animals were inoculated intracaecally with 2.5 x 10(5) polyxenic trophozoites of e. histolytica at 6, 12 and 15 days post-splenectomy. the animals were killed 6 or 12 days after infection and the parasite burden was evaluated. removal of the spleen in both susceptible and resistant ... | 1985 | 2999680 |
| [epidemiology, etiology and laboratory diagnosis of infectious diarrhea diseases in the tropics]. | diarrhoeal diseases belong to the leading causes of morbidity and mortality in tropical countries, especially in infants and small children. about one billion episodes are estimated for this group of age with 4.6 million fatalities. many causes are discussed to explain the high incidence: bottle feeding of infants, protein malnutrition, unsafe drinking water and unsafe disposal of excrements and sewage, unsufficient consciousness of personal and domestic hygiene, lack of knowledge on the origin ... | 1985 | 3000920 |
| pathogens that cause travelers' diarrhea in latin america and africa. | with the advent of rapid and convenient means of transportation, millions of persons travel each year from industrialized to developing countries in the tropics and subtropics. these travelers are at risk for a variety of infectious diseases that are endemic in these areas; the most frequently occurring of these is diarrhea. studies of groups of travelers to latin america and africa have found that approximately one-half develop diarrhea during their stay abroad. etiologic investigations of thes ... | 1986 | 3014633 |
| impairment of exercise tolerance due to broxyquinoline-brobenzoxaldine combination. | a case report of impaired exercise tolerance during administration of broxyquinoline-brobenzoxaldine combination in therapeutic doses is presented. the first author of this paper, a 28-year-old healthy male, volunteered as a subject for a prospective study on the neurotoxicity of halogenated hydroxyquinolines and took a course of broxyquinoline-brobenzoxaldine combination. the author, who is a karate enthusiast, observed impairment of exercise tolerance during the course of treatment with the dr ... | 1986 | 3081430 |
| parasitic infections in asymptomatic homosexual men: cost-effective screening. | the purpose of this study was to develop a cost-effective strategy for screening for enteric protozoan infections in homosexual men without gastrointestinal symptoms suggesting infection. one hundred and one homosexual men in portland, oregon, each submitted at least one unpurged stool sample; 91% submitted three samples each. of these, 27% had entamoeba histolytica, 61% had nonpathogenic protozoa with or without e. histolytica, 36% had a nonpathogen alone, and 3% had giardia lamblia. protozoan ... | 1986 | 3095515 |
| [intestinal parasitic colonization and protein-caloric malnutrition]. | intestinal parasitic infection was determined by fecal examination for parasites with several complementary methods in 380 young gabonese infants aged 6 to 24 months (190 with normal weights and 190 with malnutrition, matched for age). trichuris trichiura, ascaris lombricoides, giardia intestinalis, entamoeba histolytica and strongyloides stercoralis were the most prevalent parasites, without any difference between well-fed infants and patients with malnutrition. the higher prevalence of strongy ... | 1986 | 3101646 |
| a dot immunobinding assay (dia) on nitrocellulose membrane for the serological detection of antibodies to entamoeba histolytica. | a rapid, cheap, simple and specific serological test of adequate sensitivity for detecting igg antibodies against entamoeba histolytica antigen is described. axenically cultured amoebic antigen was used to precoat the nitrocellulose membrane. the strips were incubated with test samples and later with horseradish peroxidase (hrpo) labelled protein-a conjugate. a dark blue spot was obtained by treatment with peroxidase substrate, 4-chloro-1-naphthol, in positive samples. serum samples from 32 heal ... | 1986 | 2885949 |
| seroepidemiology of e. histolytica infection in hyderabad. | 1986 | 2885950 | |
| in vitro studies on the sensitivity of local entamoeba histolytica to anti-amoebic drugs. | the in vitro activity of drugs, namely dehydroemetine, ornidazole, metronidazole and tinidazole were determined against the locally isolated strains of e. histolytica in thailand. the test was performed in liquid monophasic medium, i.e. liver marmite serum medium. in all, locally isolated strains from thirty hosts studied, the minimal inhibitory concentration (mic) for dehydroemetine ranged from 0.125 to 1 microgram/ml, ornidazole ranged from 0.0625 to 0.25 microgram/ml, metronidazole ranged fro ... | 1986 | 2883732 |
| studies of the antigenic activity of entamoeba histolytica extracts. | 1986 | 2884001 | |
| human amoebiasis: cultivation and experimental transmission in animals. | in vitro cultivation was carried out on an initial strain of entamoeba histolytica from human source. dysphasic medium was used and concentrations of horse serum and antibiotic varied in response to developments. experimental infection of dogs, rabbits and mice was carried. except for the controls, all animals were orally infected and monitored until the experiment was terminated. parasitaemia became evident as from the 6th day in dogs experimentally infected and until about the 20th day when lo ... | 1986 | 2881905 |
| virulence of entamoeba histolytica correlates with the capacity to develop complement resistance. | 1986 | 2883155 | |
| lysozyme and complement-dependent lysis of entamoeba histolytica. inhibition by leupeptin. | 1986 | 2883156 | |
| [intestinal parasitic diseases of school children in the republic of niger]. | coprologic surveys realized in schoolchildren in a few western areas of the republic of niger provided the following results. concerning protozoa, the prevalence of amebiasis-infestation is strong in all the studies areas, giardiasis is more frequent in dry areas. as for the helminths, hymenolepsis nana is met everywhere, the prevalence of ancylostomiasis decreases gradually from the south to the north and the endemic area of schistosoma mansoni is limited to the extreme south of the country. th ... | 1986 | 2879647 |
| [in vitro effect of tinidazole on entamoeba histolytica]. | 1986 | 2879651 | |
| [molecular mechanisms in the pathogenicity of entamoeba histolytica]. | 1986 | 2879652 | |
| protection of mice against intestinal amoebiasis with bcg, corynebacterium parvum and listeria monocytogenes. | treatment with corynebacterium parvum or bcg, or infection with live listeria monocytogenes was found to protect mice against subsequent infection with entamoeba histolytica. complete protection was obtained in mice treated with 10(7) (colony forming units) of bcg but not with 10(5). partial protection was achieved with 10(6) of bcg. these data provide evidence that non-specific immunity plays an important role in the host defense against amoebic infection. | 1986 | 2880331 |
| in vivo effect of histamine & acetylcholine on the virulence of entamoeba histolytica. | 1986 | 2880802 | |
| [incidence of entamoeba histolytica in children with chronic diarrhea without macroscopic evidence of blood in the feces]. | 1986 | 2873654 | |
| in vitro activity of a substituted phenanthroline on entamoeba histolytica. | 1986 | 2873667 | |
| comparative in vitro activity of mefloquine, diloxanide furoate and other conventionally used amoebicides against entamoeba histolytica. | 1986 | 2874011 | |
| loss of susceptibility to complement lysis in entamoeba histolytica hm1 by treatment with human serum. | entamoeba histolytica hm1, exposed to a series of treatment with normal human serum (nhs), progressively lost susceptibility to complement lysis. trophozoites were incubated daily with unheated or heat-inactivated nhs for 2 hr at 36 degrees, starting with 10% v/v serum and increasing by 5% every 3 days up to 40% nhs. resistance to complement lysis was also obtained with two different hm1 clones but not with the low virulent strain hk9. induction of resistance dependent on the number of nhs treat ... | 1986 | 2874111 |
| antibody-dependent macrophage-mediated cytotoxicity against entamoeba histolytica. | interactions between trophozoites of entamoeba histolytica and peritoneal exudate macrophages from unsensitised and antigen-sensitised animals were studied in vitro. normal macrophages killed trophozoites to some extent. this killing capacity was enhanced by prior sensitisation of the animals with specific antigen. incorporation of anti-amoebic antiserum in the amoeba-macrophage mixture greatly enhanced the killing capacity of macrophages. fraction one (f-i) of a crude amoebic extract was most e ... | 1986 | 2874228 |
| amoebic abscess of spleen. | 1986 | 2874240 | |
| entamoeba histolytica as a commensal intestinal parasite in homosexual men. | entamoeba histolytica is considered to be an uncommon, imported organism in the united kingdom and in many parts of north america, but recent attention has been drawn to the possibility of sexual transmission of this parasite among homosexual men. to determine the prevalence and clinical importance of enteric parasitic infections in men attending a clinic in london for the treatment of sexually transmitted diseases, we studied 354 randomly selected patients who provided a single stool sample tha ... | 1986 | 2874484 |
| isoenzyme patterns and pathogenicity in amebic infection. | 1986 | 2874486 | |
| treatment of homosexual men infected with entamoeba histolytica. | 1986 | 2874487 | |
| amebic infections in asymptomatic homosexual men, lack of evidence of invasive disease. | a survey for enteric infections in 140 asymptomatic homosexual men who attended a community clinic revealed a high prevalence of infection with entamoeba histolytica (27.1 per cent) and giardia lamblia (15.7 per cent). in contrast, the prevalence of elevated indirect hemagglutination (iha) titers (greater than or equal to 1:128), which indicate invasive amebiasis, was low (5.7 per cent). our findings suggest that only a limited amount of invasive amebic disease is occurring in this group of homo ... | 1986 | 2874747 |
| elucidation of cellular population and nature of anti-amoebic antibodies in cytotoxicity to entamoeba histolytica (nih:200). | interactions between trophozoites of entamoeba histolytica and cells of the immune system were studied in vitro by mixing effector cells obtained from normal and immunized guinea pigs with trophozoites in a ratio of 10:1. crude amoebic extract (cae) and its highest molecular weight (mw 650,000) fraction (f-i) were used for priming the effector cells in vivo. the effector cells were collected from the spleens of normal and immunized animals. lymphocytes were prepared by allowing splenic mononucle ... | 1986 | 2875144 |
| analysis of antigens from membrane and soluble fractions of entamoeba histolytica. | axenic cultures of entamoeba histolytica strains hk-9, hm-1, and rahman were fractionated to provide plasma membranes, internal, vesiculated membranes, and a soluble cytosol. each particulate fraction was solubilized and all fractions were analyzed by techniques designed to demonstrate molecular complexity and serologic reactivity. the cytosol contained more antigenic moieties than either membrane fraction; however, the antigens associated with the membranes had very high reactivity and lower no ... | 1986 | 2875181 |
| [research on helminth eggs and protozoan cysts on money]. | 1986 | 2875514 | |
| [enteropathogens in travellers returning from the tropics]. | diarrhea is not only the most common health hazard during travel in the tropics but also the most frequent condition which prompts returning travellers to see a physician. the prevalence of bacterial and parasitic enteropathogens in people attending our outpatient department after returning from the tropics has been studied and the laboratory results of stool examinations have been compared with clinical symptoms. of the 173 persons enrolled, 19 (11%) harboured bacterial pathogens and pathogenic ... | 1986 | 2875520 |
| in vitro amoebicidal testing of natural products; part i. methodology. | 1986 | 2876447 | |
| the detection of enteropathogens in acute diarrhea in a family cohort population in rural egypt. | in 8 villages of rural northeastern egypt, a 2-year study of the etiologic agents associated with episodes of diarrhea was carried out. stool specimens (3,243) from 3,513 episodes of diarrhea were processed for enteropathogens. the most commonly identified agents in the group with diarrhea were giardia lamblia (44%), heat stable enterotoxin (st)-producing enterotoxigenic escherichia coli (etec) (15%), heat labile toxin (lt)-producing etec (12%), enteropathogenic e. coli (epec) (4%), rotavirus (3 ... | 1986 | 2876656 |
| [measurement of oxidation-reduction potentials in the cultivation of entamoeba histolytica]. | 1986 | 2876762 | |
| in vitro antimicrobial effects of furazolidone & metronidazole. | 1986 | 2876955 | |
| prevalence of enteric parasites in homosexual patients attending an outpatient clinic. | a total of 372 pooled stool specimens from 274 homosexual men with diarrhea were submitted for parasitologic examination over a 2.5-year period. each two-vial pooled specimen set contained portions of stool from 3 consecutive days in formalin and polyvinyl alcohol. of the 274 patients, 133 (48.5%) harbored one or more intestinal protozoa, with 161 (43.3%) of the 372 specimens submitted being positive for one or more organisms. the parasites identified included entamoeba histolytica (71 patients) ... | 1986 | 2877006 |
| on three stages of amoebic research. | 1986 | 2877277 | |
| interaction of serum components with the cytotoxic action of entamoeba histolytica. | native normal human serum is capable of inhibiting the cytotoxic action of entamoeba histolytica against k562 tissue culture target cells assessed by a 51cr-release test. it is suggested that a part of the inhibitory activity on amoebae's cytotoxic action is represented by the complement system which is known to lyze trophozoites by activation of the alternative pathway. for the rest of the serum's inhibitory activity on amoebic cytotoxic action molecule(s) is (are) responsible which act(s) inde ... | 1986 | 2877551 |
| factors contributing to the pathogenic behavior of entamoeba histolytica. | 1986 | 2877612 | |
| impaired production of alpha and gamma interferon in asymptomatic homosexual males. | in vitro production of alpha interferon and gamma interferon was examined in cell cultures from 90 asymptomatic homosexual males and 19 healthy heterosexual male controls. the production of alpha and gamma interferon was significantly suppressed in homosexuals as compared to that in heterosexual controls (p less than 0.005 and p less than 0.001, respectively). forty-one of the homosexuals produced less gamma interferon than any of the heterosexual controls. antibodies against the human immune sy ... | 1986 | 2877877 |
| changes in isoenzyme patterns of a cloned culture of nonpathogenic entamoeba histolytica during axenization. | the axenization of an entamoeba histolytica isolate with a nonpathogenic isoenzyme electrophoretic pattern (zymodeme) was recently achieved for the first time (15). forty days after the cells were transferred to the medium used for axenic cultivation, the amebae developed virulence properties, and the zymodeme converted to a pathogenic pattern. to exclude the possibility that the original isolate consisted of two zymodeme populations and that conditions of growth selected for a particular popula ... | 1986 | 2877951 |
| amoeba research and history. | 1986 | 2878270 | |
| macrophage spreading inhibition test as an alternate method for in vitro assessment of cell-mediated immunity against entamoeba histolytica. | during cellular immune responses sensitized lymphocytes release a number of mediators collectively known as 'lymphokines'. the assaying of macrophage spreading inhibition (msi) factor released by sensitized lymphocytes was employed as an alternative procedure for in vitro detection of cell-mediated immunity (cmi) in animals immunized with amoeba antigen preparation. the msi test was compared with macrophage migration inhibition test. a well defined cmi was detectable in animals immunized by amoe ... | 1986 | 2878487 |
| immunodiagnosis of entamoeba histolytica and ascaris lumbricoides infections in caucasian and aboriginal australians. | the immunodiagnostic efficiency of an indirect immunofluorescence test (ifat) and in vitro lymphocyte proliferative responsiveness (cell mediated immunity test, cmit) used to measure the immunological responses of individuals with known natural entamoeba histolytica and ascaris lumbricoides infections, was studied under survey conditions. e. histolytica was common among aborigines from cherbourg, kowanyama and central australia, but it was not found in brisbane caucasians. the protozoan was sele ... | 1986 | 2878514 |
| isoenzyme patterns of entamoeba histolytica isolates from asymptomatic carriers: use of gradient acrylamide gels. | a vertical polyacrylamide gradient gel (3% to 7%) was designed to facilitate the electrophoretic resolution and classification of isoenzyme patterns of entamoeba histolytica isolates. the following enzyme systems were used: phosphoglucomutase (pgm), hexokinase (hx), glucosephosphate isomerase (gpi), and malate dehydrogenase (me). the modifications in the electrophoretic procedure and sample preparation allowed the reproducible comparison of enzyme patterns of axenic, monoxenic, and mixed culture ... | 1986 | 2878625 |
| longitudinal study of diarrhoeal disease in a peri-urban community in manaus (amazon-brazil). | a 20-month longitudinal study of diarrhoeal disease was carried out in a poor peri-urban community of manaus (amazon-brazil), and the attack rate of this disease ranged from 0.2 to 4.8 episodes of diarrhoea per person per year. the age group most affected was 0 to 35 months old. a probable aetiological agent was identified in 68 of the 110 faecal samples collected. the most frequent enteropathogens isolated were enterotoxigenic escherichia coli and giardia lamblia. enterotoxigenic escherichia co ... | 1986 | 2878647 |
| partial characterization of dna-dependent rna polymerases from entamoeba histolytica. | 1986 | 2884943 | |
| [analysis of the organization of the dna of various strains and clones of entamoeba histolytica]. | 1986 | 2884944 | |
| [development of a basic material for an axenic culture medium for entamoeba histolytica. ii. peptones]. | 1986 | 2884945 | |
| isolation and initial characterization of dna from entamoeba histolytica hm1:imss. | 1986 | 2884946 | |
| high salt sds-dep isolation of rna from entamoeba histolytica: the recovery of intact 25s rrna from amebae of different culture ages and the co-isolation of dna. | 1986 | 2884947 | |
| [castela texana: screening for its anti-amoebic activity]. | 1986 | 2884948 | |
| [localization and identification of adhemiba i, a protein which participates in the adhesion of entamoeba histolytica to human erythrocytes and epithelial cells]. | 1986 | 2884949 | |
| adhesion of entamoeba histolytica trophozoites to human erythrocytes. 1. maintenance of the integrity, viability and adhesion of trophozoites in different media. | 1986 | 2884950 | |
| adhesion of entamoeba histolytica trophozoites to human erythrocytes. 3. the inhibition patterns by carbohydrates are strain-specific. | 1986 | 2884951 | |
| [characterization of 3 mutants of entamoeba histolytica deficient in virulence with different phenotypes for adhesion and toxin activity]. | 1986 | 2884952 | |
| [mitogenic and lectin activity of mutants of entamoeba histolytica deficient in virulence]. | 1986 | 2884953 | |
| [multifactorial mechanism for the cytolytic activity of entamoeba histolytica]. | 1986 | 2884954 | |
| cytopathogenicity of entamoeba histolytica; a cytoplasmic heat stable factor stimulates dna synthesis in mammalian cells. | 1986 | 2884955 | |
| alteration of isoenzyme patterns of a cloned culture of non pathogenic entamoeba histolytica upon changes in growth conditions. | 1986 | 2884956 | |
| anti-surface antibodies to entamoeba histolytica and their role in complement lysis. | 1986 | 2884957 | |
| [acid phosphatase activity of 2 strains of entamoeba histolytica of different virulence]. | 1986 | 2884958 | |
| [diapedesis in experimental amebiasis]. | 1986 | 2884959 | |
| [experimental amebiasis in the guinea pig: a model for resistance]. | 1986 | 2884960 | |
| [immunogenicity of a delipidated antigen of entamoeba histolytica]. | 1986 | 2884961 | |
| [inhibition by antibodies of the adhesion of trophozoites of entamoeba histolytica]. | 1986 | 2884962 | |
| in vitro studies on the interaction of human monocytes and the monocyte locomotion inhibitory factor produced by e. histolytica. | 1986 | 2884963 | |
| [ultrastructural changes associated with the inhibition of human monocyte chemotaxis caused by products of e. histolytica cultured in axenic medium]. | 1986 | 2884964 | |
| [effect of supernatants obtained from lymphocytes stimulated with concanavalin a on trophozoites of entamoeba histolytica]. | 1986 | 2884965 | |
| [effect of cellular immunity on the interaction between the peritoneal cell and the ameba in vitro]. | 1986 | 2884966 | |
| [induction of a local humoral immune response against antigens of entamoeba histolytica]. | 1986 | 2884967 | |
| [detection of class iga antibodies directed against a lipopeptidophosphoglycan of e. histolytica in samples of human colostrum]. | 1986 | 2884968 | |
| [interaction in vitro of trophozoites of entamoeba histolytica with macrophages from human colostrum]. | 1986 | 2884969 | |
| [genetic transformation in entamoeba histolytica]. | 1986 | 2884970 | |
| [evaluation of cellular immunity in patients with amebic liver abscess using the leukocyte migration inhibition test]. | 1986 | 2884971 | |
| [clinical correlation of the zymodeme of entamoeba histolytica in patients in a psychiatric hospital]. | 1986 | 2884972 | |
| epidemiology of amebiasis in a rural community of mexico: serologic and coproparasitoscopic survey. | 1986 | 2884973 | |
| [cell-cycle phases of entamoeba histolytica]. | 1986 | 2884974 | |
| [epidemiology and control of amebiasis in mexico]. | 1986 | 2884975 | |
| amebiasis in the world. | 1986 | 2884976 | |
| [comparative study of zymodemes of entamoeba histolytica and the genus entamoeba in polyacrylamide gels]. | 1986 | 2884977 | |
| [production of e. histolytica hm-1 in agitated axenic culture and by fermenter]. | 1986 | 2884978 | |
| [purification of the polysaccharide portion of the lipopeptidophosphoglycan extracted from trophozoites of entamoeba histolytica]. | 1986 | 2884979 | |
| [characterization of the ribosomal proteins of entamoeba histolytica]. | 1986 | 2884980 | |
| [motility mutants of entamoeba histolytica resistant to cytochalasin d]. | 1986 | 2884981 | |
| [phases of nuclear division in entamoeba histolytica]. | 1986 | 2884982 | |
| antibody-induced caps in entamoeba histolytica: isolation and electrophoretic analysis. | polyspecific antibodies bound to the cell surface of entamoeba histolytica are polarized toward the uroid region and spontaneously released by the amoeba as supramolecular aggregate or cap. we purified these exfoliated structures and analyzed them by electron microscopy and sodium dodecyl sulfate electrophoresis. isolated caps were mainly composed of membranes and contained five major [35s]methionine-labeled bands; many more bands appeared (together with immunoglobulins) after silver staining. s ... | 1986 | 2871113 |
| amebiasis: introduction, current status, and research questions. | this series of five papers on the worldwide problem of amebiasis, its current status, research needs, and opportunities for progress has grown out of a renewal of investigative interest in amebiasis. the recent development of in vitro culture methods and of means to distinguish strain differences and the application of modern tools of cellular biology and biochemistry have raised new questions regarding strain definitions, virulence traits, host defenses, and the mechanism of invasive disease so ... | 1986 | 2871618 |
| problems in recognition and diagnosis of amebiasis: estimation of the global magnitude of morbidity and mortality. | major problems with a wide array of imperfect tests for diagnosis of amebiasis severely limit the understanding of its magnitude and epidemiology. a greater hindrance is the varied, inconsistent application of existing methods in different areas of the world. the best estimates suggest that probably 480 million people were infected with entamoeba histolytica and 36 million developed disabling colitis or extraintestinal abscesses in 1981. at least 40 thousand deaths are attributable to amebiasis, ... | 1986 | 2871619 |