High occurrence of Entamoeba histolytica in the municipalities of Ariquemes and Monte Negro, State of Rondônia, Western Amazonia, Brazil

Introduction: Entamoeba histolytica infections were investigated in residents of the Ariquemes and Monte Negro municipalities in Rondônia State, Brazil. Methods: Stool samples of 216 individuals were processed by the spontaneous sedimentation method and analyzed by microscopy for detection of the E. histolytica/E. dispar complex, followed by the immunoassay method using an enzyme-linked immunosorbent assay-based kit for the E. histolytica stool antigen. Results: E. histolytica/E. dispar cysts were present in 61% (50/82) and 44% (59/134) of the samples from Ariquemes and Monte Negro respectively, with a significant difference in the occurrence of infection between the two populations [p < 0.05; χ2 = 5.2; odds ratio = 2.0 (1.1 - 3.6)]. The E. histolytica antigen detection rate was 36.6% (30/82) for stool samples from Ariquemes, and 19.4% (26/134) for stool taken from the residents of Monte Negro. The rate of the occurrence of amoebiasis was significantly higher in the population from Ariquemes [p < 0.05; χ2 = 7.8; odds ratio = 2.4 (1.2 - 4.7)]. Discussion: Due to the high occurrence of E. histolytica infected residents diagnosed in the region and the unavailability in local clinics of a test to distinguish between the two Entamoeba species, physicians should consider treating E. histolytica/E.dispar infections. Conclusion: The results indicate that E. histolytica infection is highly endemic in the studied areas.

STUDY OF THE PREVALENCE OF Capillaria hepatica IN HUMANS AND RODENTS IN AN URBAN AREA OF THE CITY OF PORTO VELHO, RONDÔNIA, BRAZIL

Introduction: Hepatic capillariosis, caused by Capillaria hepatica (Calodium hepaticum) (Bancroft, 1893), Travassos, 1915 (Nematoda, Trichinelloidea, Capillariidae), is a common zoonosis in rodents but is rare in humans. Seventy-two cases in humans have been reported worldwide since the first case was described by MACARTHUR in 192417,27. This study aimed to determine the prevalence of Capillaria hepatica in humans and rodents in an urban area of Porto Velho, the capital of Rondônia, in Brazil. Methods: After conducting a census of the area, 490 residents were randomly selected, and, after signing a term of consent, provided blood samples that were screened for anti-Capillaria hepatica antibodies. Simultaneously, rats were captured to assess the prevalence of this parasite in rodents by histopathological examination in liver sections. Results: A prevalence of 1.8% was found among residents who had specific antibodies at a dilution of 1:150, indicating exposure to parasite eggs; 0.8% of the subjects also had positive titers at a dilution of 1:400, indicating true infection. The prevalence in rats was 2%. Conclusions: The prevalence of infection with this parasite among humans and rats was low. While the prevalence encountered among humans was within the limits reported in the literature, the prevalence among rodents was much lower.

Ocorrência de Beauveria bassiana (Bals.) Vuill. em broca-do-café (Hypothenemus hampei, ferrari) no estado de Rondônia, Brasil1

Em trabalho efetuado visando o levantamento de inimigos naturais da broca-do-café (Hypothenemus hampei, Ferrari) no estado de Rondônia, verificou-se a ocorrência do fungo Beauveria bassiana (Bals.) Vuill. conforme identificação da Embrapa Rondônia. Os frutos de café foram coletados em cafezais da cultivar Conilon (Coffea canephora), nos municípios de Rolim de Moura, Ouro Preto do Oeste e Machadinho do Oeste, Rondônia, nos meses de fevereiro a março de 2000. A percentagem média de infecção de B. bassiana em frutos broqueados variou de 0,23% a 0,47%, sendo menor que em outras regiões do Brasil.

The seasonal diet of Aequidens tetramerus (Cichlidae) in a small forest stream in the Machado River basin, Rondônia, Brazil

Trophic relationships in fish communities are affected by the availability of resources, which in turn is affected by spatial and temporal variations throughout the year. The aims of this study were to characterize the diet of A. tetramerus in a streamlet in the north of Brazil and compare its composition in different hydrological seasons (wet and dry seasons). Collections were performed every two months from October 2011 to September 2012 with the aid of seine nets, hand net and fishing traps in the streamlet located in the Machado River drainage basin in the Rondônia state. Most of the specimens collected were quite small (< 40 mm) and had empty stomachs. Our results showed that A. tetramerus feeds on a wide variety of items of plant origin, such as algae, seeds and leaves, as well as items of animal origin, including bryozoans, crustaceans, fish scales, terrestrial insects and detritus. The data also indicated higher consumption of aquatic insects than other food items, suggesting a primarily insect-based diet. Items of plant and allochthonous origin were consumed more in the wet season than in the dry season, but there were no seasonal differences in the consumption of animal and autochthonous items.

[Pyramide de canons pris à l'ennemi au rond-point des Champs-Elysées, le 13 juillet 1919] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54892

[Pyramide de canons pris à l'ennemi au rond-point des Champs-Elysées, le 13 juillet 1919] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54891

[Pyramide de canons pris à l'ennemi au rond-point des Champs-Elysées, le 13 juillet 1919] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54890

[Pyramide de canons pris à l'ennemi au rond-point des Champs-Elysées, autour du 13 juillet 1919] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54858

[Monument commémoratif de la victoire de 1915 à Arras, érigé au rond-point des Champs-Élysées] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55021

[Monument commémoratif de la victoire de 1915 à Arras, érigé au rond-point des Champs-Élysées] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55017

[Monument commémoratif de la victoire de 1917 à Reims, érigé au rond-point des Champs-Élysées] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55016

[Foule importante au rond-point des Champs-Elysées observant la pyramide de canons pris à l'ennemi, autour du 13 juillet 1919] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54845

9/7/19, Rond-point des Champs-Élysées, canons allemands entassés pour les préparatifs de la Victoire : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54794

[Monument commémoratif de la victoire des Éparges, érigé au rond-point des Champs-Élysées] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55012

[Monument commémoratif de la victoire de 1918 à Soissons, érigé au rond-point des Champs-Élysées] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55022