Skin lesions were found in two 3–4-year-old Holstein cows in a dairy farm in Shiraz. Lesions were distributed mostly around the neck, forelimbs, hindlimbs, and bilateral of midline portion and varied from nodule-like structure to patch with extensive accumulation of crust. Skin scraping samples were taken from each animal and direct smears were prepared, stained with Giemsa and observed under a...

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Skalka, B.: Bacteriocin Typing of Staphylococci. Acta vet. Bmo, 61,1992: 179-187. The report describes bacteriocin typing of staphylococcal strains using the deferred method. The collection of active strains comprised 11 strains, Q of which were isolated by the author, namely 3 S. intermedius strains, 2 S. hominis strains and 1 strain each of S. epidermidis, S. simulans, S. sciuri and S. haemol...

Anomalous Diffraction of Gram-positive Bacteria. By P. J. ORIEL . Electron Microscopic Anatomy of Motile-phase and Germinating Cells of Dermatophilus congolensis. By J. L. RICHARD, A. E. RITCHIE and A. C. PIER. . Isolation and Some Characteristics of Haemin Dependent Mutants of Bacillus subtilis. By T. J. ANDERSON and G. IVANOVICS . Loss of Type Antigen in a Type I11 Streptococcus and Identific...

A new tick species belonging to the genus Rhipicephalus Koch, 1844 (Acari: Ixodidae), namely, Rhipicephalus congolensis n. sp., is described. Males and females of this species are similar to those of Rhipicephalus complanatus Neumann, 1911 and Rhipicephalus planus Neumann, 1907, but it can be distinguished from them by a pattern of dense medium-sized punctations on the conscutum and scutum. Mal...

A comparison has been made between the chaetotaxy of the gyrodactylid monogeneans Macrogyrodactylus clarii Gussev, 1961 and M. congolensis (Prudhoe, 1957) Yamaguti, 1963 from the gills and skin, respectively, of the catfish Clarias gariepinus (Burchell) from the river Nile in Egypt. Bilaterally arranged argentophilic structures on the surface of these parasites are presumed to be sensilla and a...