S. pyogenes (GAS) is the causative agent in a wide range of group A streptococcal infections. These infections may be noninvasive or invasive. The noninvasive infections tend to be more common and less severe. The most common of these infections include streptococcal pharyngitis (strep throat) and impetigo.
Arizona Horned Toad. The horned toad is not a toad. It's really a lizard that is known by many names such as horn toads, horned lizards and horny toads. They look rather frightening and evil with pointy thorn-like projections all over their body. But these creatures are docile and completely harmless.
For example, all toads have large poison glandsâthe parotoid glandsâlocated behind the eyes, on the top of the head. Some frogs, such as some poison dart frogs, are especially toxic. The chemical makeup of toxins in frogs varies from irritants to hallucinogens, convulsants, nerve poisons, and vasoconstrictors.Many predators of frogs have adapted to tolerate high levels of these poisons.or example, all toads have large poison glandsâthe parotoid glandsâlocated behind the eyes, on the top of the head. Some frogs, such as some poison dart frogs, are especially toxic. The chemical makeup of toxins in frogs varies from irritants to hallucinogens, convulsants, nerve poisons, and vasoconstrictors.