Dibromido(4,4′-dimethyl-2,2′-bipyridine-κ2 N,N′)zinc(II)

The asymmetric unit of the title compound, [ZnBr2(C12H12N2)], contains two half-mol­ecules; both are completed by crystallographic twofold axes running through the ZnII atoms which are coordinated by an N,N′-bidentate 4,4′-dimethyl-2,2′-bipyridine ligand and two Br− ions, resulting in distorted ZnN2Br2 tetra­hedral coordination geometries. In the crystal, C—H⋯Br inter­actions link the mol­ecules

(4,4′-Dimethyl-2,2′-bipyridine-κ2 N,N′)(dimethyl sulfoxide-κO)diiodidozinc(II)

In the title compound, [ZnI2(C12H12N2)(C2H6OS)], the ZnII ion is coordinated by two N atoms from a 4,4′-dimethyl-2,2′-bipyridine ligand, one O atom from a dimethyl sulfoxide mol­ecule and two I atoms in a distorted trigonal-bipyramidal geometry. Intra­molecular C—H⋯O hydrogen bonds and inter­molecular π–π stacking inter­actions between the pyridine rings [centroid–centroid distances = 3.637 (4) and 3.818 (4) Å] are present in the crystal structure

Aqua­(4,4′-dimethyl-2,2′-bipyridine-κ2 N,N′)(nitrato-κO)(nitrato-κ2 O,O′)zinc

In the title compound, [Zn(NO3)2(C12H12N2)(H2O)], the ZnII atom is six-coordinated in a distorted octa­hedral geometry by two N atoms from a chelating 4,4′-dimethyl-2,2′-bipyridine ligand, one water O atom, one O atom from a monodentate nitrate anion and two O atoms from a chelating nitrate anion. In the crystal, there are aromatic π–π contacts between the pyridine rings [centroid–centroid distances = 3.9577 (13) Å] and inter­molecular O—H⋯O and C—H⋯O hydrogen bonds

Prospective cohort study reveals unexpected aetiologies of livestock abortion in northern Tanzania

Livestock abortion is an important cause of productivity losses worldwide and many infectious causes of abortion are zoonotic pathogens that impact on human health. Little is known about the relative importance of infectious causes of livestock abortion in Africa, including in subsistence farming communities that are critically dependent on livestock for food, income, and wellbeing. We conducted a prospective cohort study of livestock abortion, supported by cross-sectional serosurveillance, to determine aetiologies of livestock abortions in livestock in Tanzania. This approach generated several important findings including detection of a Rift Valley fever virus outbreak in cattle; high prevalence of C. burnetii infection in livestock; and the first report of Neospora caninum, Toxoplasma gondii, and pestiviruses associated with livestock abortion in Tanzania. Our approach provides a model for abortion surveillance in resource-limited settings. Our findings add substantially to current knowledge in sub-Saharan Africa, providing important evidence from which to prioritise disease interventions

Michele Wellman (image)

Fall Issuehttp://deepblue.lib.umich.edu/bitstream/2027.42/61095/3/2803.pd