inflict suffering and death upon mankind not such a restless explore everything in sight it would not be such a dangerous path but it is a quickly at home as it visits back and forth between surrounding the finery and places of sale before arriving in the spotlessly clean kitchen flies may visit along the way such places as an on sanitary pretty the king animal carcass on an open top where to see germs thrive in trash and garbage tests have proven that flies from a dump such as this are capable of flying as far as twenty miles away to alight perhaps on babies birthday cake and while baby may find swatting at flies an amusing part of the celebration these germ laden flies may bring or the unwanted get a bad timing  but two main factors which make the house fly sucked menace to human health are its structural characteristics and its rapid rate of reproduction first let's consider some of the important structural features of the house line it is a flies body these hairs are one of the means by which the fly picks up and transports millions of disease germs as it visits sources of contamination being a true insect  compound eyes is divided into approximately four thousand facets are individual lenses the eyes of the male housefly are spaced closer together than those of the female the interesting feeding organ or process can be retracted almost completely into the head when not extended for feeding the end of the process is a spongy heart shaped structure composed of tool that's all about which the fly presses against any substance upon which it desires to feed disease germs then parasites made here to them about on the fly feed they may then be carried to the next place the fly visits and deposited as the wings and legs of the fly located on the far acts provide excellent locomotion for the fly in its incessant explorations both wings and legs in contacting cells become important factors in the disease spreading activity  each of the flies seed is equipped with a pair of claws which are used for clinging to rough surfaces some segments of the legs and feet are sensitive to taste on each rod we see from the need a light colored structure helpful to the fly makes the fly a more dangerous transmitter of disease since it sticky feet pick up germs and parasites and distribute them everywhere the fly wa here we are letting a fly walk across a specially prepared gelatin plate this flies feed on scattering the spores of a fungus picked up from some surface on which it has walked under the microscope a few days later we can see the rapidly developing fungus as a mass of thread like branches disease germs are spread and multiply in the same manner boss flies respiratory and it just of systems extend through the thorax and the abdomen the abdomen also and closes the reproductive system breathing is accomplished through holes are porous called spirals in the body wall the feeding and adjust of systems on the fly and still another manner in which the fly spreads disease here we have an animated diagram to give us an idea harder the justice system function when necessary the fly the saliva from a cell a very glands onto its food to help soften it oftentimes it also regurgitates partially digested food from its crop to help to liquify food it wishes to eat the proboscis then sucks up the food in the fly would be regurgitated the flies feet would add more contamination a single housefly has been known to carry over six and a half million bacteria at one time it becomes obvious why flies are such a health menace after being prayed adjusted in the crop dance fly passes its food a little at a time from the crop and the program cricket us now opens the passageway to the stomach many of them may be deposited close together on surfaces frequently visited by flies house flies lay their eggs anywhere they find the kind of media or food on which the fly larvae can feed when they have an uncovered dirty garbage can is an open invitation to breeding fly fly larvae or maggots  a common sight in unkempt garbage can accumulations of animal refuse also ideal breeding places for flies thousands of fly eggs may be laid in illinois piles within a few through which the eggs are laid a single housefly lays an average of one hundred to one hundred fifty eggs at a time and may lay up to seven batches of eggs in an average lifetime of two or three weeks but probably why the eggs are so a tiny one hundred  fifty of them can rest on a pencil point food matter in which they find themselves within an average of five to fourteen days in temperate zones they will be full grown lively while they are growing they go through three distinct larval stage is called in stars at the end of each of the first two stages are in stars the maggots molds its skin when ready to mold the old skin breaks open at the head or pointed and and slips off as the maggot crawls away when fully grown the maggots reach a length of one third to one half and it soon thereafter they moved to a nearby dry area to pubic hair the last skin of the maggots tribbles up and becomes the brown seed like protective coat of the pupa we will now see by time lapse photography the color of the pupil changes in summer temperatures the pupils stage lasts an average of five days live a which few bait in late fall may remain in the pupil stage until the following spring when the transformation from larva to fly has been completed the fly pushes off the end of the pupil case here we see flies breaking out of their pupil cases aided by  out of its pupil case sometimes the emerging flies find it necessary to work their way out through debris so i just leaves manure or say and that is covered them during the few patient period the flies expanders act then guns in very handy by alternate expansion and contraction of the sac the fly is able to open a passageway ahead of itself and with the aid of its legs it can escape to the surface after the fly emerges from its pupil case its exoskeleton hardens body juices flowing to the wings to expand them the transparent wings death and as they dry the flies various body parts take on their characteristic coloration the flies expander disappears being withdrawn into the head never to be seen or used again now a new generation of flies is ready to carry on the spread of filth and disease not too many flies heed that age old invitation come into my parlor said the spider to the fly since there are not sufficient natural controls to effectively reduce the fly population man must assume the responsibility for stopping this notorious public health enemy from wandering at will in our communities but swatting flies one by one while millions of new ones are hatching we'll never begin to solve the fly problem insecticide sprays though they are a great help in killing flies are only a part of an adequate control program research laboratories are constantly seeking for new methods and insecticides to control  entomologist is using nuclear equipment to test the food preferences of flies but sanitation is the only sure cure for the housefly menace and sanitation begins at home each citizen's home and with each citizens personal habits of cleanliness while this house why it properly maintains a high standard of cleverness she may still be plagued by the flies which are bred in the filth of a distant neighborhood or a farm or sanitation is not practiced these flies represent not only a potential danger to human health for miles around but to the lives on this and surrounding farms as well flies transmitted number of diseases and parasites from infected animals to healthy ones it is obvious that a serious and far reaching community responsibility rests upon each citizen to practice good sanitation habits for example to keep the flyby opulent down poisoned bait is regularly distributed around this dairy b and of course there is no excuse for anyone helping to create such an unsightly and on sanitary mess this roadside always products should be completely burned or buried in the city disposal of waste products such as garbage trash and sewage becomes a costly operation most cities and towns have sanitation departments and modern facilities for proper ways disposal after being collected in sanitary trucks crash and garbage is transported to municipal dumps in some cases it is used as fill for lost from the land areas by being buried it is not only out of the reach of flies but it sometimes helps to reduce the cost of garbage collection through the increased value of the filled land municipalities consume garbage in huge incinerators in most areas treatment plants process and sterilize raw sewage before dumping it into our waters this means cleaner lakes and stream and in turn cleaner recreational areas with fewer flies less chance of disease and better fishing since raw sewage is as destructive division as it is attractive to flies while civic sanitation agencies have made good progress in establishing climate control procedures only the cooperative action of each individual can ensure final elimination of the health menace represented by this prolific pet