New risk limits for 18 pesticides in surface water Evidence suggests that existing standards for some of these substances do not sufficiently protect the ecosystem. For others, no standards exist yet or the existing standards are outdated. If these
Regional differences in testing rates underestimate incidence of LGV epidemic Until 2003, Lymphogranuloma venereum (LGV), an aggressive form of chlamydia, was considered to be a rare tropical disease, endemic to Africa, Asia and the Caribbean.