Dissertações em Biologia de Agentes Infecciosos e Parasitários (Mestrado) - PPGBAIP/ICB
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/4738
O Mestrado em Biologia de Agentes Infecciosos e Parasitários teve início em 2004 e funciona no Programa de Pós-Graduação em Biologia de Agentes Infecciosos e Parasitários (PPGBAIP) do Instituto de Ciências Biológicas (ICB) da Universidade Federal do Pará (UFPA).
Navegar
Submissões Recentes
Dissertação Acesso aberto (Open Access) ICB/PPGBAIP Estudo da ocorrência e perfil de suscetibilidade aos antimicrobianos de Staphylococcus aureus isolados de pacientes e profissionais de saúde na Unidade de Terapia Intensiva de hospital público de Rio Branco-AC(Universidade Federal do Pará, 2011-02-07) LAVIOLA GARCÊZ, Poliana Torres; LOUREIRO, Edvaldo Carlos Brito; http://lattes.cnpq.br/2685418720563351The nosocomial infection is a serious public health problem worldwide, mainly in patients admitted to the Intensive Care Unit, which are subject to greater risk due to the severity of clinical symptoms, constant use of broad spectrum antibiotics and frequency of use of invasive procedures. Staphylococcus aureus is a major pathogen that colonizes healthy individuals and is also responsible for infections in hospitalized patients. This study aimed to identify the resistance profile, main sites affected by infection and possible risk factors associated with infection or colonization by S. aureus isolated from patients and healthcare professionals from the Intensive Care Unit of Hospital Emergency and Emergency, Rio Branco (HUERB) – Acre. We developed a cross-sectional study, conducted between January to August 2009. To search for carriers, biological samples were collected from microbiota of patients and professionals and professionals hand washing. For a survey of cases of patients with nosocomial infection were collected biological samples from sites suspected of being affected, 72 hours from the date of admission until discharge, transfer or death. Of the 62 patients enrolled in the study, 19.3% were carriers and 6.4% developed nosocomial infections by S. aureus, and 35 professionals, 28.6% were carriers of S. aureus. It was the second most bacterial species isolated from patients, and was the fifth most isolated from cases of nosocomial infection. There was no statistical evidence for the variable state of coma, use of invasive procedures and state of carrier patient are considered risk factors for acquiring nosocomial S. aureus in this study. The anatomical sites affected by IH by S. aureus were the respiratory tract ( n=2), followed by blood (n=1). The sample catheter tip was responsible for one insulated. One (1.6%) patient developed IH by MRSA, and 5 (8,1%) patients and 2 ( 5.7%) professionals were MRSA carriers, low occurrence as it relates to the results of the rest of Brazil and world. We also emphasize the incidence of MRSA over MSSA and low antomicrobial resistance of MRSA demonstrating that the UTI-HUERB, the IH S. aureus does not constitute a public health problem. There were no isolates of S. aureus resistant to vancomicina, wich can be considered a therapeutic option for cases of IH by MRSA. It is worth emphasizing the importance of this study in Acre State, for being the first of its kind in the UTI, involving S. aureus and MRSA.Dissertação Acesso aberto (Open Access) Avaliação dos fatores de risco associados à transmissão do HTLV-1 e do HTLV-2, em doadores de sangue, na cidade de Belém do Pará(Universidade Federal do Pará, 2006-04-10) LOPES, Bruna Pedroso Tamegão; LEMOS, José Alexandre Rodrigues de; http://lattes.cnpq.br/0820294977759092In order to define the epidemiological profile of the Human T-cell Lymphotropic Virus (HTLV-1 and HTLV-2) among inapt blood donors population, at the HEMOPA Foundation, in Belém, state of Pará, we analyzed 113 epidemiological forms, related with risk factors associated with these retrovirus transmission, among carriers and noncarriers of HTLV. We observed that 76% (n=50) of the inapt blood donors were infected by HTLV-1 and 24% (n=16) by HTLV-2; 62% (n=70) of the carriers were male and 38% (n=43) were female, with a tendency of infection in this gender (p=0,007). The risk factors which exhibited significant results were: have received blood transfusion (p=0,0003), more specifically to HTLV-2 (p=0,02); have been breastfeeding from non-mother (p=0,006), more specifically to HTLV-1 (p=0,04); have been submitted to surgery (p=0,01), discriminately to HTLV-1 (p=0,03) and HTLV-2 (p=0,04); share blades/shavers (p=0,02), more specifically to HTLV-1 (p=0,02); do not use condoms during sexual intercourse (p=0,0003), discriminately to HTLV-1 (p=0,001) and HTLV-2 (p=0,002). Despite of the diverse stages existing in the process of selection of blood donors, which the main objective is to eliminate potentials candidates carrying transmissible blood diseases, in special of chronic and asymptomatic course, exist bias that disable an exempt process of fails.Dissertação Acesso aberto (Open Access) Investigação do polimorfismo do exon - 1 do gene MBL (Mannose-Binding Lectin) em pacientes portadores de tuberculose(Universidade Federal do Pará, 2009-03-31) ARAÚJO, Mauro Sérgio Moura de; VALLINOTO, Antonio Carlos Rosário; http://lattes.cnpq.br/3099765198910740Mannose-binding lectin (MBL) is considered an acute phase protein with important role in the first line of defense of the innate immune system, whose serum levels are genetically determined. The MBL activates the lectin pathway of complement, and mediate the phagocytosis of microorganisms and opsonization. Several studies have associated serum levels of MBL to susceptibility or resistance to infectious agents including the Mycobacterium tuberculosis, causative agent of human tuberculosis. Aiming to evaluate the occurrence of a possible association between MBL gene polymorphisms and tuberculosis, it was evaluated the frequencies of mutations in exon 1 of MBL gene in a group of 167 TB patients, divided into 3 groups: patients with pulmonary tuberculosis, with extrapulmonary tuberculosis, patients with multiresistant tuberculosis to drugs and the control group with 159 health professionals. The identification of alleles MBL*A, *B, *C and *D was performed by polymerase chain reaction, using specific sequences of primers and subsequent enzymatic digestion. The analysis of allelic and genotypic frequencies of exon 1 did not show any significant difference between patients with tuberculosis and control group (p> 0.05). There were no significant associations between groups of pulmonary tuberculosis, extrapulmonary tuberculosis and multidrug drug among themselves and when connected to the control group. Data from our study showed no evidence of any influence of variations in the exon 1 of MBL gene in active tuberculosis, suggesting that the gene polymorphism has no influence on susceptibility to tuberculosis.Dissertação Acesso aberto (Open Access) Soroprevalência e caracterização molecular do Vírus da imunodeficiência humana (HIV) e do Vírus linfotrópico de células T humanas (HTLV) em mulheres profissionais do sexo do Estado do Pará, Brasil(Universidade Federal do Pará, 2007-08-03) SOUSA, Ronaldo Lopes de; MACHADO, Luiz Fernando Almeida; http://lattes.cnpq.br/8099461017092882The Women’s Professional of the Sex (WPS) constitute a vulnerable population to the acquisition of sexually transmissible illnesses (STI) in virtue of the type of activity that they play. The present work had as objective to describe the serumprevalency of the infection and the molecular characterization of the HIV and the HTLV of WPS of the State of Pará, Brazil. Blood sample’s of 339 WPS were collected, being 105 proceeding from the city of Barcarena, 31 of the city of Augusto Correa, 98 of the city of Bragança and 105 of the city of Belém, in the period of April of 2005 the August of 2006. All the plasma samples had been tested for the presence of antibodies anti-HTLV-1/2 and anti-HIV-1/2, by means of the use of a immune enzimatic assay. The prevalence of the HIV-1 and the HTLV-1 in the studied population was of 2,36% and 1,77%, respectively. The amplification of the gene pro of the HIV-1 disclosed subtypes B and F, whereas the samples of HTLV, had been classified as HTLV-1 of the Cosmopolita subtype of the Transcontinental sub-group. It had a significant association of the infection for the HIV-1 with the age band, the number of partners per week and with the capricious use of condoms. However, the infection for the HTLV-1 alone showed significant association in relation to the capricious use of condom. The sexual relation was the most likely way of acquisition of the infection for the two viral agents, considering that the report of use of injective drugs was rare. Being thus, the WPS need bigger attention of the public agencies of health, specially in relation to the prevention and monitoring of transmissible agents by sexual pathways, as these can be important in the acquisition and dissemination of these agents.Dissertação Acesso aberto (Open Access) Epidemiologia molecular do Vírus linfotrópico de células T humanas - HTLV 1/2 no Estado do Amapá-Brasil(Universidade Federal do Pará, 2006) SILVA, Ivanete do Socorro Pinheiro da; ISHAK, Marluísa de Oliveira Guimarães; http://lattes.cnpq.br/2847150361567807The geographical distribution of the infection by human T-cell lymphotropic virus 1/2 – HTLV 1 / 2 is extensive, nevertheless, there are areas that are more endemic and have more particularities depending on the HTLV type. The HTLV 1 shows a bigger occurrence in south west of Japan, Caribbean, Central America, in different regions of South America and in parts of Central, as well as in western Africa, while HTLV-2, seems to assault distinct groups of people, such as Indians native people from North, Central and South America, Pigmies from Central Africa, Mongols in Asia as well as in infecting drug users. The present work had as objective describing HTLV molecular epidemiology, in three different populations the State of Amapá, they are: HIV/IDS positive patients, Afro-descenig population and individuals assisted of Public Health Center Laboratory of Amapá – LACEN-AP, directed for diagnosis of HTLV. The samples were tested for the presence of virus using serological (ELISA and Western blot) and molecular assays (gene amplification and restriction fragment length polymorphism from pX and env for the analysis of polimorfismo o restriction fragments for endonuclease action. The obtained results in different populations are In the population of HIV infected people, all the samples were negative; in the Afro-desceding population, only one sample was positive confirmed by serological test (ELISA), but negative according to western blot test and submitted to the molecular analysis, there wast not amplification. However, among samples of individuals directed for diagnosis of HTLV, 06 (six) were positive, 5(five) out of 6/them were confirmed by western blot test. The molecular result demonstrated the presence of HTLV-1.Dissertação Acesso aberto (Open Access) Situação imunológica dos profissionais de saúde de um laboratório de pesquisa em relação ao vírus da hepatite B(Universidade Federal do Pará, 2009-08-27) OLIVEIRA, Candida Maria Abrahão de; NUNES, Márcio Roberto Teixeira; http://lattes.cnpq.br/0299116892743368Hepatitis B is a serious problem of public health, in particular for health-workers, who have an increased risk of acquiring this disease, through contact with patients or infected materials, following accidents and, frequently, in the lack of preventive measures. The object of this study was to determine the prevalence by serologic markers of infection with hepatitis B virus, among workers of a research institute, by way of a descriptive and epidemiological study. 528 samples of blood were collected, during January - April, 2008, in order to analyse serologic markers of hepatitis B by immunnoenzimatic techniques, which detected a total prevalence of 39,7% for some marker of HBV, with 0,4% by HBsAg+; 8% by anti-HBc+/HBs+; 2,5% isolated anti-HBc+ and 28,8% by isolated anti-HBs+. Among the individuals interviewed 31,6%, they were vaccinated against hepatitis B, having among than 38,9% individuals with no response to the vaccine and 80,8% susceptible, made up of non-vaccinated individuals, those not responding to vaccination. These results indicate showed the necessity to carry out Regulation 32, of the Ministry of Work and Employment, protects the health-worker.Dissertação Acesso aberto (Open Access) Avaliação do nível de concordância do teste imunocromatográfico OptiMAL-IT® e a gota espessa no diagnóstico da malária, no município de Mazagão-AP, Brasil(Universidade Federal do Pará, 2007) FADUL, Danielle Scerne; COUTO, Álvaro Augusto Ribeiro D'Almeida; http://lattes.cnpq.br/3800209721205388The precocious diagnosis and the opportune treatment of the cases of malaria is one of the main strategies for the control of the disease. Several alternatives for the traditional microscopic diagnosis were proposed in the last years, the Immunochromatographic tests that capture white antigens of the parasites of the malaria they are being proposed, as the test OptiMAL-IT® that captures the lactic desidrogenase of the Plasmodium sp.. The study had as objective the evaluation of the level of agreement between the Immunochromatographic test (OptiMAL-IT®) and the thick drop for the diagnosis of the malaria in the City of Mazagão – Amapá, Brazil. 413 individuals were analyzed with malaria sintomatology that had looked for the service of the unit of health service of the city, with age among 01-68 years. The results of the OptiMAL-IT® test were compared with the obtained results, of the same samples, through the thick drop red-faced by the Giemsa. Of the 413 patients suspicious to present malaria, 317(76.8%) were positive through GE and 311 (75.3%) were positive for TDR OptiMAL-IT®. Of the positive blades of GE, had been found 27.4% of P. falciparum and 72.6% of P. vivax . The OptiMAL-IT® test detected 27.7% of P. falciparum and 72.3% of P. vivax. The sensibility obtained with TDR for P. falciparum was of 97.7% and for P. vivax was of 98.2%, the global sensibility of TDR was of 98.1% and the global specificity for both the species was of 100%. They were found preditivos values positive and negative of 100% and 94.1%, respectively. The OptiMAL-IT® test had a high agreement with thick drop, it is specific and efficient. It can be used in the diagnosis of malaria in the situations where microscopy is not available.Dissertação Acesso aberto (Open Access) Estudo da susceptibilidade à infecção pelo HIV-1 e da progressão da AIDS em associação ao polimorfismo no gene Mbl (Lectina Ligadora de Manose)(Universidade Federal do Pará, 2004-09-12) COSTA, Marcos Rogério Menezes da; VALLINOTO, Antonio Carlos Rosário; http://lattes.cnpq.br/3099765198910740The low serum concentration of Mannose-Binding Lectin (MBL) is associated to the presence of variant alleles Mbl-*B, Mbl-*C and Mbl-*D, and it results in an increased susceptibility to recurrent infections. The present study investigated the association between the Mbl gene polymorphism and the susceptibility to HIV-1 infection. A fragment of 349 bp from the exon 1 of the Mbl gene was amplified by PCR and then submitted to RFLP analysis using the endonucleases BanI and MboII, aiming the identification of the variant alleles. The study of 145 seropositive patients and 99 healthy controls showed the presence of alleles Mbl-*A, Mbl-*B and Mbl-*D, with frequencies of 69%, 22% and 9% among patients and 70.2%, 13.6% and 16.2% among healthy controls, respectively. The analysis of the genotype frequencies showed a high prevalence of the genotypes carriers of variant Mbl-*B among patients seropositive as compared to the healthy controls. Furthermore, the genotype B/B was six times more frequent among patients than the observed to the healthy controls (χ2=4.042; p=0.044). The mean viral load was lower in HIV-1 seropositive patient carrying the Mbl-*A allele than those carrying the variant Mbl-*B allele (5,821 copies/mL vs. 52,253 copies/mL; p= 0.05). Furthermore, patients carrying the allele Mbl-*A showed a significant reduction of the viral load (p<0.001), that was not observed among those carrying the variant Mbl-*B (p=0.999). The results suggest the importance of the Mbl gene polymorphism on the clinical evolution of the patients infected by HIV-1 and that the identification of the Mbl genetic profile, among HIV-1 infected patients, may be an important tool to monitor the evolution and the prognosis of diseases.Dissertação Acesso aberto (Open Access) Doadores de sangue positivos em triagem sorológica para doença de Chagas no Acre: necessidade de adequação e orientação diagnóstica(Universidade Federal do Pará, 2011-01-24) SILVA, Pablo Rodrigo de Andrade e; PÓVOA, Marinete Marins; http://lattes.cnpq.br/2256328599939923This study, which involved 77,893 blood donors who attended for the first time the Blood Center of Acre, from January 1997 to December 2008, aimed to: 1) to identify individuals with positive serology for Chagas disease, 2) characterize clinically, individuals with positive serology for Chagas' disease and 3) properly orient individuals serologically positive for therapy advocated. The sample consisted of 91.6% of male patients, with an average age around 47, all residents of the state of Acre. Serological screening was performed with the application of the ELISA positive results with 102 of these, 12 were included and subjected to confirmatory testing, of whom 11 had confirmed the positive result. According to the evaluation of complementary exams (ECG, echocardiography and endoscopy), a donor had installed the cardiac and the other an indeterminate form of the disease. You must provide the confirmatory test for Chagas disease in the routine of blood banks in order to ensure timely referral to a qualified medical assistance to that blood donor who became Chagas’ patients.Dissertação Acesso aberto (Open Access) Estudo morfológico de microparasitas em Aequidens plagiozonatus Kullander 1984 (Osteiththyes: Cichlidae)(Universidade Federal do Pará, 2010-12-22) VIDEIRA, Marcela Nunes; MATOS, Edilson Rodrigues; http://lattes.cnpq.br/7895814591867510The ornamental fish market has been growing gradually in recent years and the increasing pressure on the banks of natural fishery resources, seeks to find alternatives to the continued production of fish through aquaculture or is the search for new features or even slightly, such as fish Aequidens plagiozonatus, common name cará pixuna. Based on this knowledge is important to perform studies characterizing the parasitological profile of these species of fish in order to verify and control the spread of parasites that cause imbalance in aquatic ecosystems. The objective this study was to provide a better understanding the bioecology, through a survey of actions caused by parasitic microparasites (microsporídios, myxosporídios e coccidios) emphasizing the morphology of these organisms. For this, five collections were made, totaling 100 specimens, which were autopsied and having their organs. Parasitized organs were removed fragments, fixed and processed for light microscopy. Hepatosomatic index were calculated and the prevalence of the parasite specimens for each group of parasites analyzed, giving the enfaze microparasites. From the observations made were 3 phyla were found: Myxozoa, Microsporidia and Apicomplexa. We observed the first occurrence of mixosporidiose urinary bladder of this species. We also observed the occurrence of multiparasitism and the multifocal localization of some parasites. The prevalence of microsporidia in the studied was 100%, 18% myxosporeans, Apicomplexa 45%. These data represent an important contribution to the study sanitary fish A. plagiozonatus in the region, since any activity that involves the extraction of natural resources should be managed through planning and management measures to allow the equilibrium of ecosystems, promoting sustainable use of its resources and guaranteeing the preservation of the system, so that it can prevent the spread and transfer of disease by means of aquatic animals. Keywords: Fish, Ictioparasitology, Aequidens plagiozonatus, microparasites.Dissertação Acesso aberto (Open Access) Prevalência da infecção pelo Papilomavírus humano (HPV) em mulheres investigadas para o câncer cervical, na cidade de Belém, Para(Universidade Federal do Pará, 2009-04-29) MONTEIRO, Jacqueline Cortinhas; MACHADO, Luiz Fernando Almeida; http://lattes.cnpq.br/8099461017092882The human Papillomavirus infects basal cells of stratified epithelium, inducing the development of benign proliferative lesions in the skin or mucous membranes. The infections have universal distribution. Many studies have demonstrated the strong association of infection by species of high-risk cervical cancer. Therefore, this study sought to determine the prevalence of HPV infection in a group of women screened for cervical cancer. From january 2008 to december 2009 were collected cervical samples from 180 women seen at the Laboratory of Cytopathology of Universidade Federal do Pará (UFPA), with 162 eligible for the study. Each participant was collected two samples, one for the manufacture of cytological smears for subsequent analysis by the Papanicolaou method and the other for analysis of molecular biology, in order to investigate the presence of HPV, using the primers MY09 and MY11. The species of HPV have been identified by PCR sequencing of nucleotide bases of the L1 ORF of HPV. The analysis of the epidemiological profile of the study group showed that the average age accounted for 37.5 years. The majority (49.38%) were married, 37.65% had initiated sexual activity between 13 and 17 years old and 58.64% did not use condoms during sex. The overall prevalence of HPV was found to be 18.52%. Thirteen different types were identified, with the majority (66.67%) was a low-risk group, in which HPV-11 was more frequent. Among the high risk group (30%) HPV-31 was found in four cases. The species distribution of HPV according to the cytology showed that the prevalence of infection was higher in the group of women whose smear was free of abnormal cytology (43.33%). In the group of women with premalignant changes only observed infections by species of low risk (10%). HPV infection was significantly associated with sexual activity and the frequency in the completion of screening. The prevalence in this study corroborates other findings in the medical literature. The prevalence of infection in women with normal cytology reinforces the idea that the infection is mostly asymptomatic and the Papanicolaou method is less efficient in detecting the infection than the techniques of molecular biology. However, when dealing with disease detection premalignant or malignant, molecular biology is not applicable and therefore should not replace the PCCU.Dissertação Acesso aberto (Open Access) Avaliação da diversidade de insetos hematófagos da subordem Nematocera e de vertebrados silvestres: transmissão de arbovírus na área de influência do Projeto Salobo, Carajás, Pará(Universidade Federal do Pará, 2009) MONTEIRO, Hamilton Antonio de Oliveira; VASCONCELOS, Pedro Fernando da Costa; http://lattes.cnpq.br/0973550817356564Aiming to evaluate the diversity of hematophagous insects and sylvan vertebrates, as well as the arbovirus fauna present in the area, a longitudinal study was performed in the Salobo Project area, Mineral Province of Carajas, Pará state, Brazil, between December 2005 and June 2007 (seven scientific expeditions), before the action of mineral extraction be launched. Insects belonging to the families Ceratopogonidae, Culicidae, Psychodidae, and Simulidae were collected using the miniature CDC and Shannon light traps, and human bait; sylvan vertebrates (birds, small mammals and reptilians) were also captured in the are using Shermann and Tommahwak traps. Biological specimens from insects and vertebrates were used to attempt of virus isolation in suckling mice, while the vertebrate serum samples to determine the antibody prevalence to 19 arboviruses by hemagglutination inhibition (HI) tests. A total of 44,795 (1,220 lots) hematophagous insects were collected, mostly of Psychodidae. The most abundant species of Culicidae were Haemagogus leucocelaenus and Haemgogus janthinomys; a total of 1,288 vertebrates were also captured; the rodents Proechimys guyannensis and Oryzomys capito, and the birds Turdus albicolis and Phlegopsis nigromaculata were the most prevalent species in the area. Three Tucunduba virus strains were isolated from lots of Anopheles (Nys.) sp., Culex coronator and Wyeomyia sp. HI antibodies were found to Bussuquara virus, Cacipacore virus, Icoaraci virus, Ilheus virus, Mucambo virus Rocio virus, Saint Louis encephalitis virus (SLEV), and western equine encephalitis virus. The most prevalent arbovirus by HI was the SLEV.Dissertação Acesso aberto (Open Access) Aspectos microbiológicos e epidemiológicos da doença diarréica aguda no município de Juruti, Pará(Universidade Federal do Pará, 2010-12-20) SOUSA, Eveline Bezerra; LOUREIRO, Edvaldo Carlos Brito; http://lattes.cnpq.br/2685418720563351The presente study described the epidemiological and etiological aspects of acute diarrhea in Juruti, Pará, Brazil. A total of 261 fecal samples were investigated (diarrheagenic, n = 170 and control, n = 91), from patients attended in Public Health Units in the period from February to July 2009. Samples were investigated for bacterial, Rotavírus and parasitic enteropathogens using microscopic examination, immunological tests (ELISA) and bacterial culture techniques. Two multiplex PCR were designed for the detection of all categories of diarrheagenic Escherichia coli. A total of 154 samples were positive (diarrheagenic, n = 118 and control, n = 36), in which 75,4% were represented for mono infections and 24,6% for mixed infections. Most of cases included children less than 10 years of age (55,9%), which no significant difference were found between female and male. The most common enteropathogens in diarrhoeal samples were E. histolytica/E. dispar (26%), Shigella spp (15,7%), Giardia lamblia (13,3%) and diarrheagenic E. coli (12,8%), from which Shigella spp (p = 0,0028) were shown to be associated to the cases of acute diarrhea. The most frequent categories of E. coli in diarrhoeal cases were ETEC (7,2%) and EAEC (5,9%). The less frequent enteropathogens, in diarrhoeal samples were Campylobacter jejuni/coli (4,7%), Rotavírus (2,8%), Salmonella Panama, A. hydrophila and A. sóbria (0,5%). These results are useful for environmental and epidemiological surveillance of acute diarrhea disease in Juruti.Dissertação Acesso aberto (Open Access) Análise taxonômica e molecular de Cestoda nematotaeniidae parasito de intestino delgado de Rhinella marina (Linnaeus, 1758) (Amphibia: Bufonidae) de Belém-Pa(Universidade Federal do Pará, 2010-07-02) MELO, Francisco Tiago de Vasconcelos; SANTOS, Jeannie Nascimento dos; http://lattes.cnpq.br/4543897195525368The amphibians of the species Rhinella marina known also as Giant Toad and have cosmopolitan distribution. Posses nocturnes habits, due of variety of feeding they can live in different habitats. Then, they can have many kinds of helminthes parasites. Among the helminthes, the cestodas are the target of study of this work. The members of Nematotaeniidae Family are commonly found in small intestine of repitilian and amphibians. The frequent auto-infestation would justify the high taxes of parasitism in one host. The present study has the objective to identify and to characterize the Cestoda of Rhinella marina from Belém-PA. Twenty hosts were captured in homes of the metropolitan area of Belém-PA and, after necropsy the Cestoda were isolated of intestine, and some specimens were fixed in A.F.A (Glacial Acid Acetic 2%, Formaldehyde 3% and 95 % of Etanol 70º GL), and some worms fixed in 2% Glutaraldehyde in Cacodilate buffer 0,1m P.h 7,4, to process in different techniques. One part of the samples was dehydrated in Etanol Series, and stained with Carmim®, and clarified with Metil Salicilate®. Some specimens were dehydrated and included in Paraffin for acomplishement of longitudinal and tranverse cuts. The worms fixed in Glutaraldehyde were dehydrated and included in Historesin®. Some Cestoda were processed for Scanning Electron Microscopy (SEM). An indentification was accomplished throught drawings in Olympus BX 41 microscope equipped with camera lucida, pictures were taken in a MEDILUX microscope, with image captures system and in MEV JEOL 5310. Histological sections were photographed and 3D reconstruction was made in RECONSTRUCTTM software. The cestoid possess a cylindrical body, filiform and with difficult segmentation, except in the final portion of the strobila. Escolex with four suckers without hooks or apical organ, the pregnant proglotis presents two piriform capsules, funded in the basis and containing one or more eggs. The observations in SEM and light microscopy of the cestoda founded in small intestine of R.marina from Belém-PA, we observed that these Cestoda belong to Nematotaeniidae Family, meanwhile the other morphologic characters observed did not permit us to classify this helminth in any Gender of this Family.