Edible anurans have to rely on more than just poison glands which tend to work too late (i.e. after the predator has it in his mouth!) Related articles: How to Rid Your Garden of Toads-tips for dog owners (aside from training the dog of course!)
Manevalâs staining method is a negative staining method. To stain a capsule of a cell by Manevalâs staining method. 1  1 % Congo red solution.  Manevalâs stain.
Special Stains. Special stains (histochemical methods) are used to help visualize and/or identify structures and substances in sections. CPL can provide most standard special stains. Listed below are a few examples. Acid fast stains (various methods) for mycobacteria [Mycobacterium avium, lung, mouse]