Leech
Leeches are annelids comprising the subclass Hirudinea. There are freshwater, terrestrial, and marine leeches. Like the Oligochaeta, they share the presence of a clitellum. Like earthworms, leeches are hermaphrodites. Some, but not all, leeches are hematophagous.
The European medical leech, Hirudo medicinalis, and some congeners, as well as some other species, have been used for clinical bloodletting for thousands of years, although most leeches do not feed on human blood, but instead prey on small invertebrates, which they eat whole.
Haemophagic leeches attach to their hosts and remain there until they become full, at which point they fall off to digest. A leech's body is composed of 34 segments. They all have an anterior (oral) sucker formed from the first six segments of their body, which is used to connect to a host for feeding, and also release an anesthetic to prevent the host from feeling the leech. They use a combination of mucus and suction (caused by concentric muscles in those six segments) to stay attached and secrete an anti-clotting enzyme, hirudin, into the host's blood stream.
Some species of leech will nurture their young, while providing food, transport, and protection, which is unusual behavior amongst annelids. Why These Most Hated Animals ? : The Animal Look So Disgusting And Scary
Chinch-Bedbugs
A number of health effects may occur due to bed bugs including skin rashes, psychological effects and allergic symptoms. Diagnosis involves both finding bed bugs and the occurrence of compatible symptoms. Treatment is otherwise symptomatic.
In the developed world, bedbugs were largely eradicated as pests in the early 1940s, however have increased in prevalence since about 1995. Because infestation of human habitats has been on the increase, bedbug bites and related conditions have been on the rise as well. The exact causes of this resurgence remain unclear; it is variously ascribed to greater foreign travel, more frequent exchange of second-hand furnishings among homes, a greater focus on control of other pests resulting in neglect of bedbug countermeasures, and increasing resistance to pesticides. Bedbugs have been known human parasites for thousands of years.
The name "bedbug" is derived from the insect's preferred habitat of houses and especially beds or other areas where people sleep. Bedbugs, though not strictly nocturnal, are mainly active at night and are capable of feeding unnoticed on their hosts. They have however been known by a variety of names including wall louse, mahogany flat, crimson rambler, heavy dragoon, chinche and redcoat.Why These Most Hated Animals ? : Some Has Very Rotten Smell, And Caused Disease.
Fly/Flies
The presence of a single pair of wings distinguishes true flies from other insects with "fly" in their name, such as mayflies, dragonflies, damselflies, stoneflies, whiteflies, fireflies, alderflies, dobsonflies, snakeflies, sawflies, caddisflies, butterflies or scorpionflies. Some true flies have become secondarily wingless, especially in the superfamily Hippoboscoidea, or among those that are inquilines in social insect colonies.
The common names of true flies are written as two words, e.g., crane fly, robber fly, bee fly, moth fly, fruit fly. The common names of non-dipteran insects that have "fly" in their name are written as one word, e.g., butterfly, stonefly, dragonfly, scorpionfly, sawfly, caddisfly, whitefly.
Diptera is a large order, containing an estimated 240,000 species of mosquitoes, gnats, midges and others, although under half of these (about 120,000 species) have been described. It is one of the major insect orders both in terms of ecological and human (medical and economic) importance. The Diptera, in particular the mosquitoes (Culicidae), are of great importance as disease transmitters, acting as vectors for malaria, dengue, West Nile virus, yellow fever, encephalitis and other infectious diseases. Why These Most Hated Animals ? : The animals Live in Dirty Places And Caused Disease.
Cockroaches
Among the best-known pest species are the American cockroach, Periplaneta americana, which is about 30 millimetres (1.2 in) long, the German cockroach, Blattella germanica, about 15 millimetres (0.59 in) long, the Asian cockroach, Blattella asahinai, also about 15 millimetres (0.59 in) in length, and the Oriental cockroach, Blatta orientalis, about 25 millimetres (0.98 in). Tropical cockroaches are often much bigger, and extinct cockroach relatives and 'roachoids' such as the Carboniferous Archimylacris and the Permian Apthoroblattina were not as large as the biggest modern species. They usually live alone only coming together to mate.
Why These Most Hated Animals ? : From dirty places up to in his wardrobe often found cockroaches. Most people have a phobia of animals on this one. Many people are amused to see a cockroach, so most people do not expect to see cockroaches. And you know that cockroaches can survive for 9 days, although his head had been cut.
Head lice
Lice infestation in general is known as pediculosis, and occurs in many mammalian and bird species.The term pediculosis capitis, or simply "pediculosis", is sometimes used to refer to the specific human pediculosis due to P. humanus capitis . Humans are hosts for two other lice as well—the body lice and the crab lice.
Head-lice infestation is widely endemic, especially in children. It is a cause of some concern in public health, although, unlike human body lice, head lice are not carriers of other infectious diseases. Why These Most Hated Animals ? Because These Animals Make People Angry.
Mosquitoes
Mosquitoes go through four stages in their life-cycle: egg, larva, pupa, and adult or imago. Adult females lay their eggs in standing water, which can be a salt-marsh, a lake, a puddle, a natural reservoir on a plant, or an artificial water container such as a plastic bucket. The first three stages are aquatic and last 5–14 days, depending on the species and the ambient temperature; eggs hatch to become larvae, then pupae. The adult mosquito emerges from the pupa as it floats at the water surface. Adults live for 4–8 weeks.
Mosquitoes have mouthparts that are adapted for piercing the skin of plants and animals. While males typically feed on nectar and plant juices, the female needs to obtain nutrients from a "blood meal" before she can produce eggs.
There are about 3,500 species of mosquitoes found throughout the world. In some species of mosquito, the females feed on humans, and are therefore vectors for a number of infectious diseases affecting millions of people per year.Some scientists believe that eradicating mosquitos would not have serious consequences for any ecosystems.Why These Most Hated Animals ? Can Caused Disease And Disturbing Us.
Rats
Rats are typically distinguished from mice by their size; rats are generally large muroid rodents, while mice are generally small muroid rodents. The muroid family is very large and complex, and the common terms rat and mouse are not taxonomically specific. Generally, when someone discovers a large muroid, its common name includes the term rat, while if it is small, the name includes the term mouse. Scientifically, the terms are not confined to members of the Rattus and Mus genera, for example, the pack rat and cotton mouse.
Rats As Food
Rat meat is a food that while taboo or even forbidden in some cultures, is a dietary staple in others. Taboos include fears of disease or religious prohibition, but in many places rats are so plentiful compared to other sources of protein that it's logical why people would incorporate them into their diet.
In some cultures, rats are or have been limited as an acceptable form of food to a particular social or economic class. In the Mishmi culture of India, rats are essential to the traditional diet, as Mishmi women may eat no meat except fish, pork, wild birds and rats.Conversely, the Musahar community in north India has commercialised rat farming as an exotic delicacy.In the traditional cultures of the Hawaiians and the Polynesians, rat was an everyday food for commoners. When feasting, the Polynesian people of Rapa Nui could eat rat meat, but the king was not allowed to, due to the islanders' belief in his "state of sacredness" called tapu.In studying pre-contact archaeological sites in Hawaii, archaeologists have found that the concentration of the remains of rats associated with commoner households counted for three times the animal remains associated with elite households. The rat bones found in all sites are fragmented, burned and covered in carbonized material, indicating that rats were eaten as food. The greater occurrence of rat remains associated with commoner households may indicate that the elites of pre-contact Hawaii did not consume them as a matter of status or taste.
Bandicoot rats are an important food source among some peoples in Southeast Asia, and the United Nations Food and Agriculture Organization estimates that rat meat makes up half the locally produced meat consumed in Ghana, where cane rats are farmed and hunted for their meat. African slaves in the American South were known to hunt wood rats (among other animals) to supplement their food rations,and Aborigines along the coast in Southern Queensland, Australia regularly included rats in their diet.
Ricefield rats (Rattus argentiventer) have traditionally been used as food in rice-producing regions like Valencia, as immortalized by Vicente Blasco Ibáñez in his novel Cañas y barro. Along with eel and local beans known as "garrafons", rata de marjal is one of the main ingredients in traditional paella (later replaced by rabbit, chicken and seafood).Ricefield rats are also consumed in the Philippines, the Isaan region of Thailand, as well as Cambodia. In late 2008, Reuters reported that the price of rat meat had quadrupled in Cambodia creating a hardship for the poor who could no longer afford it. Cambodia exports about a metric ton of rats daily to Vietnam as food.
Elsewhere in the world, rat meat is considered diseased and unclean, socially unacceptable, or there are strong religious proscriptions against it. The British SAS's rule book lists rat as the only meat which its members in action are not allowed to eat in order to prevent them from contracting Weil's disease. Islam and Kashrut traditions prohibit it, while both the Shipibo people of Peru and Sirionó people of Bolivia have cultural taboos against the eating of rats.
Rats are a common food item for snakes, both in the wild, and as pets. Captive-bred ball pythons in particular, are fed a diet of mostly rats. Rats, as food items, are available from many suppliers who supply to individual snake owners as well as to large reptile zoos. In Britain the government in 2007 ruled out the feeding of any live mammal to another animal. The rule says the animal must be dead (frozen) then given to the animal to eat. The rule was put in to place mainly because of the pressure of the RSPCA and people who found it cruel.
Rats In medicine
Rats can serve as zoonotic vectors for certain pathogens and thus cause disease, such as Lassa fever and Hantavirus. Rattus rattus, and the rat flea Xenopsylla cheopis, are notorious for their role in epidemics of bubonic plague.
In odor detection
Rats have a very good sense of smell and are easy to train, this has led to their use in Landmine and Tuberculosis detection
Rat in terminology
Rats are frequently blamed for damaging food supplies and other goods, or spreading disease. Their reputation has carried into common parlance: in the English language, rat is often an insult. Rat is generally used to signify an unscrupulous character. Writer/Director Preston Sturges created the humorous alias "Ratskywatsky" for a soldier who seduced, impregnated, and abandoned the heroine of his 1944 film, The Miracle of Morgan's Creek. It is a term (noun and verb) in criminal slang for an informant - "to rat on someone" is to betray them by informing the authorities of a crime or misdeed they committed. Describing a person as "rat-like" usually implies he or she is unattractive and suspicious.
Among unions, "rat" is a term for non-union employers or breakers of union contracts, and this is why unions use inflatable rats. Why These Most Hated Animals ? Look So Scary, And frequently blamed for damaging food supplies and other goods, or spreading disease.
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