Fipronil is a broad use insecticide that belongs to the phenylpyrazole chemical family. Fipronil is used to control ants, beetles, cockroaches, fleas, ticks, termites, mole crickets, thrips, rootworms, weevils, and other insects.Fipronil is a white powder with a moldy odor.ipronil is used to control ants, beetles, cockroaches, fleas, ticks, termites, mole crickets, thrips, rootworms, weevils, and other insects. Fipronil is a white powder with a moldy odor.
While the cause of rheumatoid arthritis is not clear, it is believed to involve a combination of genetic and environmental factors. The underlying mechanism involves the body's immune system attacking the joints. This results in inflammation and thickening of the joint capsule. It also affects the underlying bone and cartilage.
Causes of rheumatoid arthritis. Rheumatoid arthritis is an autoimmune condition, which means it is caused by the bodyâs immune system attacking itself. However, it is not yet known what triggers this.Normally, your immune system makes antibodies that attack bacteria and viruses, helping fight infection.auses of rheumatoid arthritis. Rheumatoid arthritis is an autoimmune condition, which means it is caused by the bodyâs immune system attacking itself. However, it is not yet known what triggers this.