This form of circlip often used in assemblies subjected to strong centrifugal forces, is also secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.his form of circlip often used in assemblies subjected to strong centrifugal forces, is also secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.
Frequently Asked Questions about Black Fly Dangers. Q: Can Black Flies carry diseases? A: Yes, they have been known to transmit diseases to humans and animals. In Africa, Central America and South America, Black Flies can transmit two diseases to humans: onchocerciasis, known as âriver blindness,â and mansonellosis.
Sleeping sickness is most commonly spread through the bite of an infected tsetse fly. Even in areas where the disease occurs, only a small percentage of flies are generally infected. Tsetse flies are the size of a honey bee and are grey-brown. They usually bite during the daytime and their bites are usually quite painful. A human becomes infected with Trypanosoma brucei parasites when an infected tsetse fly feeds on his or her blood. The parasites that cause sleeping sickness, especially T. b. rhodesiense, can also infect cattle and wild animals. In rare cases, sleeping sickness can also be spread: