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.
In some cases, specific stains can be used to visualize certain structures (flagella, capsules, endospores, etc). of bacterial cells. There are several staining methods that are used routinely with bacteria. These methods may be classified as 1) simple (nonspecific) and 2) differential (specific).