Nematode assemblages associated with the parthenogenetic lizard Ameivula nativo in six restinga areas along the eastern coast of Brazil.

We surveyed the nematode assemblages associated with populations of the parthenogenetic whiptail lizard Ameivula nativo from six coastal restinga areas in eastern Brazil: Setiba, Comboios and Guriri (State of Espirito Santo) and Guaratiba, Prado and Maraú (State of Bahia). A total of five nematode species (Physaloptera retusa, Physalopteroides venancioi, Skrjabinelazia intermedia, Subulura lacertilia and Parapharyngodon sp.) were recorded from the six different populations of A. nativo. There was considerable variation in overall prevalence of infection (1-42%) among study sites, but geographical distance among areas did not influence similarity in the composition of nematode assemblages. Overall intensity of infection was not affected by lizard body size and did not seem to affect host body condition, based on pooled data of all populations. The studied populations of the unisexual A. nativo had relatively low prevalences and intensities of infection compared to some bisexual congeners and to sympatric lizards from other families for which such data are available. We believe that the low richness of the nematode fauna associated with A. nativo, both locally and regionally, may reflect its narrow geographic distribution and the low diversity of habitats it occupies.

[Regional distribution of violence: mortality from external causes in Salvador (Bahia), Brazil]. / Distribuição espacial da violência: mortalidade por causas externas em Salvador (Bahia), Brasil.

The aim of this paper was to describe the geographic distribution of mortality resulting from external causes during 1991 within the city of Salvador, Bahia, Brazil. Mortality indicators were calculated in terms of deaths from external causes and in terms of specific types of violence. Of the deaths in that year, 15% were due to external causes, corresponding to a mortality rate of 78/100,000 inhabitants. The homicide death rate was 32.2/100,000 inhabitants, and the traffic-related death rate was 21.8/100,000 inhabitants. The elderly, young adults, and teenagers were at higher risk of death from violent causes. Among the elderly, 38% of the deaths were from car accidents and 28% from falls. Among teenagers, homicides were the main cause of death, especially in males between 15 and 29 years of age. Our results show that the geographic distribution of violent deaths in Salvador is uneven. Such deaths occur mainly in poorer neighborhoods, which have higher violent death rates than average for the city of Salvador. There is a need for prevention and control measures, including public policies and public health activities, focusing on the areas that have the greatest risk of death from external causes.