""Dangers of the fly" was rendered from a 35 mm copy, very well preserved by the "Pablo Ducrós Hicken" Film Museum." "During the process, a likely correct speed for projection was estimated." "DANGERS OF THE FLY" "The aim of this film is to disseminate to the audience a knowledge that generally remains restricted to researchers." "The magnification diameters given in this film refer to the size of the image as projected on an 8 meters screen." "The fly, dipterous, grows in filth, lives among men and is the carrier of many diseases." "These insects have been and continue to be the object of countless scientific studies carried out by zoologists, entomologists and hygienists." "These dipterous are studied in medical zoology and parasitology research laboratories from a systematic point of view" "(placing these insects in the zoological system )." "For a systematic study, zoologists begin by differentiating species within the same class" "(In this case Brachycera )." "Their biology ( characteristics and habits), and their role as carrier and transmitter of pathogenic germs." "Fly legs are made of hair, claws, bristles, spines and flakes that work as an outstanding conveyor of germs, microorganisms and diseases." "By observing the wing veins, different types of Brachycera can be classified:" "MUSCIDAE, TABANIDAE, CESTRIADE, ASILIDAE, etc." "The proboscis, an organ for grasping and sucking the food that this insect finds in rubbish, gets loaded with germs that can immediately be placed on man's food, skin and wounds." "(Enlargement:" "3850 diametres)" "In order to be studied, and without losing hair, flakes, bristles and other features that allow them to be identified, they are kepts in special jars." "They are put to death using Xylol, Chloroform, Benzine and Ether gasses, etc." "Afterwards, they are fastened with silver, gold or other stainless metals pins and are kept in special packing jars." "Flies are classified by their Proboscis, either inermis or pointed, depending on whether they can lacerate human and animal skin." "CHRYSOMIA MACELLARIA" "Vulgar name:" "SCREWWORM FLY" "MUSCA DOMESTICA" "Vulgar name:" "HOUSE FLY" "There are countless different kinds and species of inermis flies." "Given their similar biology, they are profanely named flies.." "SARCOPHAGA CARNARIA" "Vulgar name:" "FLESH FLY" "Given that the fly legs are an excellent microorganism conveyor..." "If a solid growth media is melted in a sterile, germ free capsule  once it is cold, a fly is laid over it  and it walks along that sanitized surface   each step leaves a footprint..." "... because the feet were in touch with filth and loaded with it, they leave germs with every step." "If that capsule is placed in an oven at 37º centigrade temperature  each microorganism reproduces until forming a colony of millions of bacteria." "24 hours later, the capsules impregnated by the flies  show that a bacteria colony has grown around each footprint." "If these colonies are touched using a previously sterilized platinum applicator  and a sample is spread over a sterilized glass  observing it through a microscope so we can see ... a tiny drop of culture fluid" "contains millions of moving bacteria, the cause of several diseases." "(Enlargement: 35.000 diameters)" "Dissecting a fly  shows that some of the bacteria and protozoan ingested by the insect are destroyed, while others resist digestion and thus reproduce." "Located in the dipterous excrements, these germs can affect people and cause diseases." "The events observed in the laboratory are identical to those that take place in nature." "The fly rubs its head and feet while eating from the same food that human beings will eat later the wings  and other parts  getting rid of the germs that they are loaded with." "Through different procedures  the fly leaves germs in all sorts of substances, like milk, stock, meat, etc, all of which constitute an excellent growth medium where germs can reproduce into millions within a few hours." "Through these habits, flies transmit:" "TYPHOID FEVER, DYSENTERY," "CHOLERA, AND OTHER SEVERE INFECTIONS." "(The proboscis is covered with hair, which is an excellent microorganism transmitter)" "The fly, a germ carrier, can alter the properties of milk that will later be ingested by children, causing food poisoning, disease, and the death of thousands of infants." "The death rate caused by intestinal diseases among the infantile population (0 to 3 years) reached 8500." "This indicates how dangerous they are." "The following process has been described as the major cause of" "Poliomyelitis or  Infantile paralysis..." "disease that kills 8900 of sick children in period of days  those who survive are crippled or paralyzed for life." "This disease, like brain and spinal cord meningitis, tuberculous meningitis and meningeal edema caused by intestinal intoxication are a statistical group called meningitis." "Our hospital treats thousands of children affected by this disease." "After visiting places where excrements are disposed, the fly becomes a carrier of intestinal Vermes eggs (worms) through the same procedure described earlier." "Minuscule Cestoda larvae pierce the skin, reach the intestine and cause severe anemia." "Enlargement: 100 diameters" "Different protozoan like Balantidiun coli and Entamoeba dysenteriae cause acute dysentery." "Enlargement: 7000 diameters" "The hematophagous fly uses its proboscis to pierce the skin and suck blood." "STOMOXYS CALCITRANS" "Vulgar name:" "STABLE FLY" "TABANUS MEXICANUS" "Vulgar name:" "HORSE FLY" "PANGONIA SP.?" "Some of these species transmit trypanosomiasis, also known as sleeping disease or "mal de caderas"." "When men or animals are stung by this type of fly, they develop a deadly disease in a period of 9 to 10 days." "Through the observation of a blood sample taken from a sick animal, naturally or artificially infected red corpuscles numerous moving protozoans live and thus reproduce in the animal's blood, causing anemia, paralysis." "Trypanosoma equinum..." "This is the parasite that causes mal de caderas disease..." "Tripanosoma equinum:" "a genus of parasitic flagellate protozoa of the family Trypanosomatidae." "Enlargement: 350.000 diameters" "MUSCA DOMESTICA, STOMOXIS CALCITRANS and other species develop in excrement." "They lay eggs in excrement, rotten meat and other organic decomposed substances, where larvae can feed on." "Laying eggs takes them approximately 30 minutes." "This egg laying insect uses its touch sensibility  to find a hidden, appropriate place to lay its eggs..." "Enlargement: 2000 diameters" "... a group of 280 to 300 eggs are laid at the same time." "If these eggs were placed one next to the other, they would cover a 712 square millimeters surface." "Using a microscope, one can see that the eggs show a longitudinal line, where they hatch." "Enlargement: 5000 diameters" "Depending on the temperature conditions, hatching occurs 12 to 24 hours after the eggs are laid." "Enlargement: 3150 diameters" "This process occurs in less than a minute." "... the new born larvae" "leave the egg shells." "The larvae are viscous and transparent." "They develop in a period of 8 to 14 days, depending on the temperature conditions and food availability." "The larvae turn into 8 to 10 millimeter long, opaque white worms." "Once the larvae are completely developed they stop eating and moving" "The metamorphosis begins..." "The larva turns into a pupa in 1 to 2 hours." "When the pupa is totally still, its outer shell gets thick and hard." "Its color turns from white to brown." "This process takes approximately 6 hours." "The fly can hibernate in excrement until the following season." "When the new season begins," "the pupa breaks and a perfect insect is born." "The size of a fly does not vary along its life." "When it is born, its color is clear." "Its wings are stuck to its sides." "One hour after birth, the fly is dry, it starts moving and eating." "And it starts pursuing its filthy mission..." "If a fly lays approximately 300 eggs, and only half of them complet the process as described earlier, the following summer there will be:" "1stOctober: 1 fly 1st November: 150 flies." "1st December: 22.500 flies." "1st March: 75.937.500.000 flies." "if this amount lays eggs during this period 22.934.144.295.301 flies." "are born in only one summer." "If you kill a fly, you are killing 22 TRILLION dangerous insects." "There are countless procedures to exterminate flies." "The most successful and the one with best results in practice, is to create a hostile environment for this dipterous." "Demonstration:" "A capsule containing excrements (Nº1) and another capsule containing excrements and lime at 1000 (Nº2 ) are exposed to flies." "8 to 10 days later, there is a large amount of larvae in the first capsule (Nº1)  while no larvae has grown in the second capsule ( nº2 )." "Every means at our disposal to exterminate flies are useful." "Insecticide is as deadly to flies as machine guns are to men." "A mix of:" "Milk 100 grams, Sugar 1 tablespoon, Formol 1 tablespoon" "This is an effective fly-killing candy." "Fly paper  and different traps." "All of these devices are highly effective." "THE END"