Vector competence of Culex quinquefasciatus Say, 1823 exposed to different densities of microfilariae of Dirofilaria immitis (Leidy, 1856)

The metropolitan region of Recife, Brazil is endemic for Dirofilaria immitis and has an environment favorable to the development of Culex quinquefasciatus. The goal of this study was to evaluate the vector competence of the Cx. quinquefasciatus RECIFE population for D. immitis transmission. A total of 2,104 females of Cx. quinquefasciatus RECIFE population were exposed to different densities of D. immitis microfilariae blood meals, ranging from 1,820 to 2,900 mf/ml of blood, in a natural membrane apparatus. The results showed a variation between 92.3% and 98.8% of females fed. The exposure of the Cx. quinquefasciatus RECIFE population to different densities of microfilariae did not influence the mortality of the mosquitoes. Infective larvae from D. immitis were observed in the Malpighian tubules beginning on the 12th day, whereas larvae were observed in the head and proboscis beginning on the 13th day following infection. The vector efficiency index (VEI) presented by the mosquitoes ranged from 7.8 to 56.5. The data demonstrates that the Cx. quinquefasciatus RECIFE population has great potential for the transmission of D. immitis, as it allowed the development of the filarid until the infectious stage at the different densities of microfilariae to which it was exposed.

Capital formation in machinery in Latin America, 1890-1930

Investment in machinery is a key aspect in the analysis of long-term economic growth during the era of the spread of industrialisation. But, historiography has only revealed what the pace of capital accumulation was in a few Latin American economies. This article offers continuous (annual) and consistent series on the magnitude of this investment in all of the Latin American countries for the period at the height of the first globalisation, 1890-1930. The paper gives special attention to comparative analysis, showing the differences that exist at the heart of the Latin American community, in the levels of capital formation in machinery as well as in the national development of this over time. The differences in the levels appear very indicative of the unequal degree of development reached by these economies. This article puts to test the hypothesis of intraregional divergence, obtaining the tentative result that there was divergence until 1913, but that there was convergence from 1914-1930.

Representações de Cabo Verde e dos Cabo-verdianos: 1890-1910

O nosso objectivo consiste em analisar como, no período que vai do Ultimatum britânico de 1890 à implantação de I República em Portugal (1910), se representavam o arquipélago de Cabo Verde e a sua sociedade, partindo do princípio que quem representava eram sobretudo os colonos portugueses e, por outro lado, de como os próprios cabo-verdianos se auto-representavam. Para a representação tanto do espaço como da sociedade em si, tivemos em linha de conta um conjunto de questões sociais, geográficas e territoriais, que nos permitiu, de uma forma clara, caracterizar e descrever quer o espaço, quer a sociedade cabo-verdiana no período estudado. Neste sentido e atendendo à nossa finalidade, dividimos o trabalho em três capítulos; No primeiro, analisámos a sociedade cabo-verdiana da época e de maneira a perceber de que sociedade se está a falar, caracterizando-a do ponto de vista social, cultural e religiosa; No segundo, abordamos a questão da identidade cultural, o que nos permitiu descrever a sua representação e o sentimento de pertença da sociedade caboverdiana; Finalmente, no terceiro e último capítulo, caracterizámos o espaço, falando da identidade geográfica propriamente dita, concluindo como se representava Cabo Verde – província/colónia ou África.