Mosquitoes are a menace for millions of people around the world, they vectors destructive microorganisms which cause diseases like Malaria, Dengue fever and Lymphatic filariasis, affecting in developing countries areas with tropical climates. Anopheles, predominant genus transmits malaria, World Health Organization have shown that 350,000 lives especially children pregnant women lost annually b...

A female, just hatched, having wings serrated or notched at the end, was found in the purple stock bottle, October 7, 1918. In order to test whether this character was due to a new mutation the female was mated to males from an unrelated stock. The majority of her few F, daughters had typically “notch” wings quite like the females in the old stocks called notch (see MORGAN and BRIDGES 1916). La...

BACKGROUND Haematoxylin and eosin staining has remained the standard diagnostic method for Burkitt's lymphoma. Ancillary tests including immunohistochemistry, not widely available in developing countries, are important tools in verifying the diagnosis of lymphomas with equivocal morphological findings. OBJECTIVE To evaluate the reliability of haematoxylin and eosin staining in the diagnosis o...

BACKGROUND Detection of vascular invasion by hematoxylin and eosin staining is the current pathological assessment practice to diagnose breast carcinoma. However, conventional hematoxylin and eosin staining failed to distinguish between blood vessel invasion and lymphatic vessel invasion. Both are important prognostic criteria however with different outcomes. The aim of this study is to disting...

This study was designed to assess whether nucleic acid stains such as propidium iodide and Hoechst 33258 and the cytosolic stain eosin identified equivalent proportions of non-viable cells. Sub-samples of boar spermatozoa stored for up to 72 h, and frozen bull spermatozoa stored in straws and thawed before staining, were exposed to either propidium iodide or Hoechst 33258 alone or in combinatio...

The various theories of the nature of the act of staining of animal cells, tissues and products, which have been put forward by different writers fall into three groups: (i) that the process of staining is a chemical reaction between the dye on the one hand, and the cell or tissue elements on the other; (2) that in staining the dye is adsorbed by the tissue elements stained; and (3) that the dy...