95%(42)40 out of 42 people found this document helpful
This preview shows page 1 - 3 out of 13 pages.
PBHE 413 Exam 2 (Graded)Question 1 of 520.0/ 20.0 PointsDiscuss the differences in clinical presentation between a person who is a victim of a chemical vs. a biological event.During triage at a hospital or a disaster scene, it is very important recognize the differences between chemical and biological events. A chemical attack paralyzes certain nerve transmissions throughout the body and ca Exam 2Question 1 of 520.0/ 20.0 PointsDiscuss the differences in clinical presentation between a person who is a victim of a chemical vs. a biological event.During triage at a hospital or a disaster scene, it is very important recognize the differences between chemical and biological events. A chemical attack paralyzes certain nerve transmissions throughout the body and causes other toxic effects such as seizures. Depending on weather conditions, nerve agents which sometimes begin as volatile liquids, in which they can evaporate quickly and be absorbed through the skin. During exposure to liquids, A small droplet on the skin, for example, may cause local sweating and muscle twitching, followed by nausea, vomiting, diarrhea, and generalized weakness. Even with decontamination, signs and symptoms may last for hours. In contrast, people with severe liquid exposures may show no symptoms for as long as 20 minutes and then may rapidly suffer abrupt loss of consciousness, convulsions, generalized muscular twitching, paralysis, secretions (from the nose, mouth, lungs), difficulty breathing, and death.Nerve agents may also cause problems to the upper respiratory tract and produce runny noses, drooling,and weakness of the tongue and throat muscles. High-pitched, distressed breathing can occur. Nerve agents produce a variety of signs and symptoms throughout the central nervous system. People may loseconsciousness (sometimes within seconds of exposure) and have seizures. Symptoms such as headache, dizziness, numbness or tingling, anxiety, insomnia, depression, and emotional instability also have been reported. Nerve agents also paralyze muscles, with even minimal exposure, victims may complain of vague weakness or difficulty walking. Whenever chemical nerve agent liquid or vapor penetrates the eye tissues, this may cause the pupils to contract, causing blurred and dim vision, headaches, redness, tears, pain, nausea, and vomiting.
In regards to biological agents, they are divided into two categories: pathogens and toxins. Pathogens areliving microorganisms that cause disease in man, animals, or plants. In addition, they produce disease or infection by entering the body through the lungs, digestive tract, and through breaks in the skin and mucous membranes of body openings. The human body is unable overcome the pathogens because they reproduce overcoming the body's natural defenses, causing the disease to replicate.