Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 5 de 5
Filter
1.
Rev. epidemiol. controle infecç ; 12(3): 91-98, jul.-set. 2022. ilus
Article in English, Portuguese | LILACS | ID: biblio-1425543

ABSTRACT

Background and objectives: we investigated the existence of a historical geographic overlap between the location of spotted fever group rickettsiosis human cases, a disease caused by the gram-negative bacterium Rickettsia sp., and that of mammalian reservoirs, specifically domestic horses and capybaras, in the urban perimeter of the city of Juiz de Fora, Minas Gerais, Brazil. Methods: cases of human rickettsiosis that occurred during a period of 17 years (2003-2020) were geolocated and the distribution of cases in time and geographic space was assessed using 1st and 2nd order geospatial association indicators. We also analyzed the overlap between the locations of human rickettsiosis cases and the area of occurrence of domestic horses and capybaras. Results: men were diagnosed more often than women, but a large proportion of affected women died. The results indicate an aggregation of human rickettsiosis cases in time (cases tend to occur close to each other at each epidemic event) and in geographic space (cases are concentrated in a specific geographic region of the urban perimeter). Human cases seem to be more associated with city regions with: i) higher local frequency of domestic horses and not capybaras; ii) lower rates of family development. Conclusion: it is suggested that, in the local epidemiological scenario, domestic horses appear to be the main sources of the rickettsia infecting humans, not capybaras.(AU)


Justificativa e objetivos: foi investigada a existência de uma sobreposição geográfica histórica entre a localização dos casos de riquetsiose humana do grupo da febre maculosa, um grupo de doenças causadas pela bactéria Gram-negativa Rickettsia sp., e dos reservatórios mamíferos, especificamente cavalos domésticos e capivaras, no perímetro urbano do município de Juiz de Fora, Minas Gerais, Brasil. Métodos: foram geolocalizados os casos de riquetsiose humana ocorridos durante um período de 17 anos (2003-2020), sendo avaliada a distribuição dos casos no tempo e espaço geográfico através de indicadores de associação geoespacial de 1a e 2a ordem. Também analisamos a superposição dos locais dos casos de riquetsiose humana com a área de ocorrência de cavalos domésticos e capivaras. Resultados: homens foram diagnosticados mais frequentemente que as mulheres, mas grande proporção das mulheres acometidas faleceu. Os resultados indicam uma agregação dos casos de riquetsiose humana no tempo (os casos tendem a ocorrer próximos entre si a cada evento epidêmico) e no espaço geográfico (os casos se concentram em uma região geográfica específica do perímetro urbano). Os casos humanos aparentam ser mais associados às regiões da cidade com: i) maior frequência local de cavalos domésticos e não das capivaras; ii) menores índices de desenvolvimento familiar. Conclusão: sugere-se que, no cenário epidemiológico local, são os cavalos domésticos que aparentam ser as principais fontes da riquétsia infectando os humanos, não as capivaras.(AU)


Justificación y objetivos: investigamos la existencia de una superposición geográfica histórica entre la localización de casos de rickettsiosis exantemáticas humana, enfermedad causada por la bacteria gramnegativa Rickettsia sp., y la de mamíferos reservorios, específicamente caballos domésticos y capibaras, en el perímetro urbano de la ciudad de Juiz de Fora, Minas Gerais, Brasil. Métodos: se geolocalizaron los casos de rickettsiosis humana ocurridos durante un período de 17 años (2003-2020), y se evaluó la distribución de casos en el tiempo y espacio geográfico utilizando indicadores de asociación geoespacial de 1er y 2do orden. También analizamos la superposición entre las ubicaciones de los casos de rickettsiosis humana y el área de ocurrencia de los caballos domésticos y capibaras. Resultados: los hombres fueron diagnosticados con más frecuencia que las mujeres, pero una gran proporción de mujeres afectadas fallecieron. Los resultados indican una agregación de casos de rickettsiosis humana en el tiempo (los casos tienden a ocurrir cerca uno del otro en cada evento epidémico) y en el espacio geográfico (los casos se concentran en una región geográfica específica del perímetro urbano). Los casos humanos parecen estar más asociados con regiones urbanas con: i) mayor frecuencia local de caballos domésticos y no de capibaras; ii) menores tasas de desarrollo familiar. Conclusión: se sugiere que, en el escenario epidemiológico local, los caballos domésticos parecen ser las principales fuentes de la rickettsia que infecta a los humanos, no los capibaras.(AU)


Subject(s)
Rickettsia Infections , Rocky Mountain Spotted Fever , Spotted Fever Group Rickettsiosis , Geographical Localization of Risk
2.
Rev. Soc. Bras. Med. Trop ; 49(1): 29-33, Jan.-Feb. 2016. tab, graf
Article in English | LILACS | ID: lil-776527

ABSTRACT

Abstract: INTRODUCTION: Due to the importance that Howler monkeys have on the yellow fever (YF) epidemiological sylvatic cycle in Brazil, more accurate morphological diagnostic criteria needs to be established, especially considering the differences that may exist between the genera of Brazilian non-human primates (NHPs) involved in yellow fever virus (YFV) epizootics. METHODS: Records of YF epizootics in NHPs in Brazil between 2007 and 2009 were obtained from the Brazilian Ministry of Health database to select YF positive (n=98) Howler monkeys (Alouatta sp.) for this study. The changes described in the histopathological reports were categorized by organ and their frequencies calculated. RESULTS: The most frequent lesions observed in the animals with YF were hepatocyte apoptosis (Councilman body formation), midzonal hepatocyte necrosis, steatosis, liver hemorrhage, inflammatory mononuclear cell infiltration of the liver, renal acute tubular necrosis and interstitial nephritis. Midzonal hepatocyte necrosis, steatosis and hemorrhage presented positive correlations with apoptosis of hepatocytes, suggesting strong YFV pathogenic effect association; they were also the main histopathological changes in the Alouatta sp. A pronounced negative correlation between apoptosis of hepatocytes and hepatic mononuclear cell infiltration pointed to significant histopathological differences between YFV infection in Howler monkeys and humans. CONCLUSIONS: The results warn that NHPs may exhibit different response patterns following YFV infection and require a more careful diagnosis. Presumptive diagnosis based on primate histopathological lesions may contribute to public health service control.


Subject(s)
Animals , Yellow Fever/veterinary , Disease Outbreaks/veterinary , Alouatta/virology , Monkey Diseases/pathology , Yellow Fever/pathology , Yellow Fever/epidemiology , Brazil/epidemiology , Monkey Diseases/epidemiology
3.
Mem. Inst. Oswaldo Cruz ; 110(3): 394-402, 05/2015. tab, graf
Article in English | LILACS | ID: lil-745970

ABSTRACT

Here, we present a review of the dataset resulting from the 11-years follow-up of Trypanosoma cruzi infection in free-ranging populations of Leontopithecus rosalia (golden lion tamarin) and Leontopithecus chrysomelas (golden-headed lion tamarin) from distinct forest fragments in Atlantic Coastal Rainforest. Additionally, we present new data regarding T. cruzi infection of small mammals (rodents and marsupials) that live in the same areas as golden lion tamarins and characterisation at discrete typing unit (DTU) level of 77 of these isolates. DTU TcII was found to exclusively infect primates, while TcI infected Didelphis aurita and lion tamarins. The majority of T. cruzi isolates derived from L. rosalia were shown to be TcII (33 out 42) Nine T. cruzi isolates displayed a TcI profile. Golden-headed lion tamarins demonstrated to be excellent reservoirs of TcII, as 24 of 26 T. cruzi isolates exhibited the TcII profile. We concluded the following: (i) the transmission cycle of T. cruzi in a same host species and forest fragment is modified over time, (ii) the infectivity competence of the golden lion tamarin population fluctuates in waves that peak every other year and (iii) both golden and golden-headed lion tamarins are able to maintain long-lasting infections by TcII and TcI.


Subject(s)
Animals , Chagas Disease/veterinary , Leontopithecus/parasitology , Monkey Diseases/parasitology , Trypanosoma cruzi , Chagas Disease/parasitology , Leontopithecus/classification , Trypanosoma cruzi/genetics , Trypanosoma cruzi/isolation & purification
4.
Rio de Janeiro; s.n; 1 nov. 2006. ix,94 p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: lil-445485

ABSTRACT

Pesquisas anteriores caracterizaram uma prevalência variável da infecção por Trypanosoma cruzi em diferentes populações de micos leões dourados(Leontopithecus rosalia-MLDs)de vida livre.Além da variação na prevalência,foram encontrados também distintos percentuais de isolamento do hematozoário através do cultivo do sangue,caracterizando a presença de diferentes perfis de infecção.O objetivo foi avaliar os efeitos da infecção por T.cruzi sobre a saúde destes calitriquídeos,bem como da possível modificação do perfil da infecção por T.cruzi pela infecção concomitante com helmintos entéricos.Foram examinados clínica e laboratorialmente 331 indivíduos de 2 espécies de primatas da Mata Atlântica,os MLD(261) e micos leões de cara dourada(70,Leontopithecus chrysomelas–MLCDs).Os MLD foram provenientes de 3 unidades de conservação(REBIO de Poço das Antas,Fazendas de Re-introdução e REBIO União,todas no estado do RJ);os MLCD foram provenientes da REBIO Una–BA.A avaliação fisiológica dos indivíduos incluiu eletrocardiogramas, hemograma e leucograma completos,bioquímica sérica(13 parâmetros diferentes).Os exames parasitológicos incluíram testes sorológicos e hemocultivo para o diagnóstico e isolamento do T.cruzi,além da pesquisa qualitativa e quantitativa(ovos por grama de fezes)de helmintos entéricos em amostras de fezes.A soroprevalência da infecção pelo T.cruzi foi de 44por cento nos MLD da REBIO de Poço das Antas,12por cento na REBIO União,13por cento nas Fazendas de Re-introdução e 78por cento nos MLCD da REBIO de Una.O isolamento do T. cruzi por hemocultivo foi de 71por cento em MLDs e de 69por cento em MLCDs.Sete novos casos de infecção por T. cruzi foram caracterizados em Poço das Antas(4por cento da amostra)e 14 novos casos foram caracterizados em MLCD (20por cento da amostra).O genótipo do T.cruzi...Os micos leões...e incluiu 6 diferentes espécies:Oncicola sp., Spiruridae sp.,Trichostrongilidae sp.,Tripanoxyurus minutus(Oxiuridae),Ascarididae sp. e Ancilostomat


Subject(s)
Animals , Callitrichinae , Helminths , Trypanosoma cruzi , Brazil/epidemiology
5.
Braz. j. vet. res. anim. sci ; 39(2): 93-96, 2002. tab, graf
Article in English | LILACS | ID: lil-337872

ABSTRACT

Serial clinical, colpo-cytological and endocrinological examinations of two five-year-old females of the crab-eating dog (Cerdocyon thous), from the RIOZOO Foundation in the State of Rio de Janeiro - Brazil, were carried out over a 10-month period. Clinically healthy animals were kept in sand substratum enclosures, located 500m apart from each other. They were each housed with two males. The colpo-cytological technique employed for Cerdocyon thous used methods similar to those developed for domestic bitches. Unlike domestic dogs, blood cells were absent in all phases of the estrus cycle, including the pro-estrus phase. Differentiation of each type of vaginal cells during the estrus cycle phases in this species follows the same patterns shown by domestic bitches. The estradiol and progesterone levels were similar to those occurring in domestic bitches. The progesterone levels reach their maximum (46 ng/ml) around the 10th day of pregnancy. The estradiol analysis demonstrated that, although levels of this hormone could be high at various times throughout the year, mating actually occurs in late winter and in spring. It was impossible to evaluate whether males and females kept in close proximity throughout the entire year would stimulate the production of estradiol, resulting in what would be considered a captivity artifice


Subject(s)
Animals , Female , Carnivora , Cell Biology , Endocrinology , Reproduction
SELECTION OF CITATIONS
SEARCH DETAIL