if there is any chance of it being poisonous, DO NOT EAT IT! it may be that the deer was walking through flowers and got pollen onn it, but it is also possible that it is bacteria growing. i would especially not eat it if it was hit by a car.
Not if you wash your hands. If you leave the blood on your hands I don't think you will get infected.
maybe it has an injury or a sore or it could be infected
If a guinea pig has sustained an eye injury and a milky substance is coming from it, it may be infected. The guinea pig will need to be taken to the veterinarian for some eye drops.
Heparin
Medication
if they bite you enough and the injury gets really badly infected yes, but otherwise no.
Toxic refers to a substance that can cause harm, injury, or death when it comes into contact with living organisms.
Anticoagulant
The rat may have been injured from a fall or other rat. Or the rat may have an infection. It should be noted that rats saliva frequently appears red but it is not blood, it is a substance called 'porphyrin'. This substance can appear when the rat is stressed out or frightened.
An alarm substance is a chemical given off from the skin of a fish after it has suffered an injury, which warns nearby fish of impending danger.
The injury may cause tissues to be exposed through wounds, which subsequently become infected by bacteria and other organisms. For example, septic wounds and/or blood poisoning
No. To become infected with HIV there must be an exchange of body fluids. Even having a HIV-infected person bleed on you isn't dangerous unless it gets into a cut or other injury.