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Nonhuman primates are potentially good sentinels of environmental toxicants because they share a similar physiology and life history with humans. In this report we present the results of an analysis of lead concentrations in hair from long-tailed macaques in Singapore. We hypothesized that because Singapore is highly urbanized, its macaque population may be(More)
BACKGROUND Recent findings of Plasmodium in African apes have changed our perspectives on the evolution of malarial parasites in hominids. However, phylogenetic analyses of primate malarias are still missing information from Southeast Asian apes. In this study, we report molecular data for a malaria parasite lineage found in orangutans. (More)
Rats and guinea pigs developed pronounced erythrocytosis at one to four months after unilateral intrarenal (ir) injection of nickel subsulfide (Ni3S2). For example, at two months after ir administration of Ni3S2 (5 mg) to rats, blood hematocrit values averaged 70 +/- 3 percent (p less than 0.001 vs. 48 4/- 2 in controls); at two months after ir(More)
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