PROBLEMÁTICA DEL GUSANO BARRENADOR DEL GANADO, Cochliomyia hominivorax (Coquerel, ) EN COLOMBIA THE PROBLEM OF SCREWWORM. The new world screwworm fly, Cochliomyia hominivorax, in larval stage is an obligate parasite of mammals and humans, causing traumatic myiasis. The female. “Comision Mexico-Americana Para la Erradicacion del Gusano Barrenador del Ganado.” Special Collections, USDA National Agricultural Library. Accessed.

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Like other insects, screwworm fly has four phases or stages in its life cycle which are: University Archives Borrow it. Additional terms may apply to data associated with third party namespaces. Occasionally cases were found in human beings. Over North and South America the NWS is known by various local names, the most common being screwworm, queresa, gusanera, bichera and bicheira. The country was divided into three large regions to facilitate inspection and the dispersal of sterile insects.

The Mission, Texas plant was closed to avoid the escape of fertile insects in the screwworm-free zone.

Gusano Barrenador del Ganado

These zones were protected by a biological barrier of sterile NWS flies see Figure 4 along almost the entire km frontier. Typically these animals are separated from the rest and seek for isolated areas or with shadows to get laid.

The screwworm has seriously affected the livestock in the American Continent, and specially the cattle. However, South America is still infested. Hyattsville, Maryland, Entomological Society of America. The initiation of screwworm eradication in Colombia could encounter geographical, political, and mainly economical problems. Resource Description Namespaces http: In addition, the C and DC-3 aircraft originally used to disperse the flies were later replaced by a fleet of smaller aircraft, such as the Cessna and PA see Figure 7.


The success of this international cooperation, which culminated in Mexico being declared NWS-free inis one of the greatest achievements in animal health in this century. Tannahill 1 Estimated H-index: Access the full text: Screwworm eradication in North and Central America.

Arthropods of domestic and production animals. Carousel Grid List Card.

In wildlife the effects of NWS can accelerate to such an extent that a species can become extinct, with catastrophic consequences. However in eradication of NWS was fully achieved. The results, however, were not satisfactory. Adults have an exceptional ability to travel up to kms, in less than two weeks.


Once all the countries of Central America were freed of screwworm, a sterile insect production plant and biological barrier see Figure 4 were established in the Isthmus of Panama, thereby taking advantage of geographical and ecological factors and the convenient position of the isthmus for ground communications with the countries of South America.

Along this critical line a sterile insect barrier would be set up as a protection from reinfestation. The Resource Gusano barrenador del ganado: Screwworm eradication has been successful in North and Central America, including some Caribbean islands. While females mate only once in their lifetime and an oviposit tanado put between 10 and 1, eggs 3, in some cases into three or four groups of gahado to each.


In addition, the cost of labor necessary for the inspection and treatment of the cattle and the ganwdo of the proper treatment can be very expensive. This proportion was determined by the number of animals that would finally benefit in both countries. Thomas Jefferson Library Borrow it. The problems of producing sufficient barrejador quality sterile flies economically were solved by the construction of an extra insect colony and the improvement of methods for rearing insects.

NWS can also damage skins and pelts and can generally reduce the production of protein of animal origin for human consumption.

El programa de erradicacion de C.

The new world screwworm in Mexico and Central America

The infestation begins when the screwworm eggs incubated in the wound of an animal or host and the larva proceeds to feed of the live flesh.

The wild NWS population fluctuates during the year, being most abundant in the most hot and humid season. It is difficult to see on first sigh in a wound, the presence of screwworm larvae in its first stages of life; only can be observed by very slight movements. Populations increased more from April to October than during the coolest and driest months.