name of animals living within animals as parasites?
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Pathogen is the term for a foreign organism living within the body.
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viruses, bacteria, fungi, or protozoan parasites
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Note correct spelling.\n\nAscaris is a genus of parasitic nematodes. One species, A. suum, typically infects pigs, taking up residence in the lower intestine, while another, A. lumbricoides, affects human populations, typically in tropical areas with poor sanitation. This infection is known as ascariasis. It is spread by the accidental ingestion of Ascaris eggs, which are produced in the lower intestine and distributed through feces.\n\nSimple answer:roundworm\n\nFollow the link for more information.\n\nhttp://en.wikipedia.org/wiki/Ascariasis
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Types of Tapeworms \nTypes list: The list of types of Tapewormsn mentioned in various sources includes: \n\nTaenia saginata - beef tapeworm that infects the digestive tract. \nTaenia solium - pork tapeworm \nEchinococcus granulosus - dog tapeworm causing hydatid disease \nDiphyllobothriasis - fish tapeworm \nAlveolar Hydatid Disease
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From an ecological-evolutionary viewpoint, a parasite is a "perfected predator", a predator that has evolved to extract resources from its host without killing it (and for some ecologists, grazing herbivores such as cows and gazelles are also parasites). \nParasites are usually much smaller than their hosts, and their particular characteristics depend on the type of parasite they are. For instance, endoparasites are much more modified and many have lost sensory or even digestive systems in favor of developing larger reproductive organs and producing lots of descendants. Ectoparasites are usually less modified with respect to their free-living relatives, but have structures and behaviors related to finding the host and remaining attached to it. \nObligate parasites are also more specialized than facultative (optional) parasites, and some species are specific parasites of a single host, while others are capable of parasitizing several species. All these different strategies involve diverse modifications, acquisitions and adaptations.\nEventually, parasites may become symbionts, by becoming gradually less damaging to their hosts and more specifically related with them.\nSee the first link for evolution of parasitism:
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ticks, but they are bugs. I do not know of any animals. But yes what was said above, and bed bugs. Lice, scabies, parasites, etc...
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Below is the taxonomy used by zoologists to classify animals.  Hope that helps.
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Millions of people are infected by the parasites worms worldwide. Parasites can enter our bodies through food, water, mosquito bites, or through the nose and skin. More than 100 types of parasites worms can be living happily in human bodies. Some are big in size that can be seen by eyes, while the others are microscopic in size. Only about 5 percent of these varieties can be tested positively with only 20 percent accuracy. \n\nParasites worms find a perfectly living environment when the bowel becomes ineffective in the elimination of the waste products due to constipation. \n\nParasites may be categorized into four types: Protozoa, Trematoda, Cestoda, and Nematoda. Nematodes include common roundworm, hookworm, whipworm, pinworm, heart worm, etc.
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I would have to say a cockroach. They sure as hell breed like them. Oh yeah I forgot it is that pathetic excuse of being Catholic. What a joke LMAO!!! Makes sense to be a cockroach, they are hard to get rid of too, don't insult the chihuahua.
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Here is a great website for that sort of research. It has a taxonomic chart with hyperlinks to information, pictures, sounds, and specimens. There are more than a dozen phylums of 'worms' represented with many photos to help with identification. \n\nhttp://animaldiversity.ummz.umich.edu/site/accounts/classification/Animalia.html
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Deer tick.  It has an interesting lifecycle requiring three alternating hosts.
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These are single-celled (unicellular) organisms, and\nhave a well-defined membrane-bound nucleus.\nTheir modes of nutrition may be quite varied.\n• Active feeders: Some protists like Amoeba and\nParamecium (Fig. 23.5) ingest food like most\nanimals. Very often these are also referred to as\nProtozoa (protos: primitive, zoon: animal).\n• Photosynthesizers: Some protists like Euglena\n(Fig. 23.3) have chlorophyll and manufacture\ntheir own food like the plants.\n• Reproduction: Mostly asexual reproduction by\nfission and some reproduce sexually.\n• Occurrence: Many protists live freely in water\nor in soil and many are harmful parasites which\ncause diseases. Some of the protists are\npathogenic, such as Entamoeba histolytica that\ncauses dysentery and Plasmodium vivax that\ncauses malaria.
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This is a long story so hold on and bear with me OK?\nThe lancet fluke (Dicrocoelium lanceolatum) belongs to the order Trematoda. Like other flukes, scientifically called trematodes, it as well shows a generation cycle with a change of reproduction as well as a change of hosts. The terminal host are mammals, usually sheep or goats. The distribute the fluke's eggs by their excrements on plants, on which snails feed. Those snails again are the intermediate host. . \nThose snails, mostly hygromiid snails of the species Helicella or enid snails (Zebrina), take in the flukes eggs together with their food. In the snail's digestive gland the fluke' first larval generation hatches. That generation is called miracidium. A miracidium is a simply built larva with few resemblance to the adult fluke. It is able to swim or at least to float by a ciliar crest. The miracidium makes a metamorphosis inside the snail, resulting in the next larval stage, that more resembles the adult fluke. The so called cercary has got a tail that propels it in the water. The cercaries change themselves in endurance stages called cystes, that the snails surrounds with a mucus layer and excretes them.\nRed ant (Formica rufa). Source: Manfred Eidelloth.   \nAnts eat those mucus balls (obviously the mucus contains also certain pheromones that makes it highly attractive to ants) and then are afflicted by the cercaries. The cercaries grow in the ants' abdomen (terminal body part) and then one of them moves into the head. There they afflict the ant's nervous system and cause a change of behaviour, that makes Bernard Werber *) call them "zombie ants". The ants now, very untypically, climb up plant stems and attach themselves with their mandibles to exposed positions such as leaves. Grazing mammals, such as sheep or goats, eat the plants together with the ants and then infect themselves with the lesser liver fluke. Inside this terminal host the cercaries change into the fluke's adult stage which reproduces sexually and then lays eggs that are excreted by the mammal -  the generation cycle is closed when the next snail eats the eggs.
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Louse, common name for several species of small, wingless insects. Three types of true, or sucking, lice infest humans: the crab louse, a broad, grayish-white insect, about 0.3 cm (about 0.13 in) long, usually found in the hairs of the pubic region; and two slender, gray lice, also about 0.3 cm long: the body louse, usually found in clothing, and the head louse, found in the hairs of the head (See also Parasite). The eggs, or nits, are attached to the hair or deposited in the seams of clothing. These species subsist on the blood of humans; the body louse is a vector in the transmission of several diseases (see Relapsing Fever; Typhus). True lice infecting domestic animals include the hog louse, the horse louse, two species of cattle lice, and the dog louse.\n\nThe biting lice, or bird lice, are insects differing from the true lice in that they possess biting (rather than sucking) mouthparts. They feed on the feathers and skin of birds and occasionally on the skin of other animals. The chicken louse is a species about 0.3 cm (about 0.13 in) long, common on domestic fowl. There are also several species that are parasitic on turkeys and pigeons.\n\nThe name louse is also applied to several other small insects, such as the plant lice (see Aphid), bark lice, and book lice. The wood louse (also known as sow bug), a crustacean, is so called because of its superficial resemblance to lice.\n\nScientific classification: True lice belong to the order Phthiraptera. The crab louse is classified as Phthirus pubis, the body louse as Pediculus humanus humanus, the head louse as Pediculus humanus captitis, and the hog louse as Haematopinus suis. The horse louse is classified as Haematopinus asini and the cattle lice as Haematopinus eurysternus and Linognathus vituli. The dog louse is classified as Linognathus setosus. The biting, or bird, lice make up the suborder Mallophaga. The chicken louse is classified as Menopon gallinae. Plant, bark, and book lice belong to the order Psocoptera.\n\nMicrosoft ® Encarta ® Encyclopedia 2005 © 1993-2004 Microsoft Corporation. All rights reserved.
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What about them?\n\nThere are literally millions of different species of invertebrate, ranging from barely mobile blobs of slime like the Placoderms to mysterious and predatory deep-sea giant squid to parasitic wasps that lay their eggs in caterpillars to caterpillars that eat leaves and get parasitized.\n\nThere is no way to generalize about their behaviour as an entire group.  A giant Australian freshwater lobster has a completely different life than a leaf-cutter ant living high in the forest canopy of the Amazon rain forest or an individual coral polyp forming part of a reef in the Caribbean.
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An animal is defined as a multicellular, eukaryotic organism that has to eat food to obtain energy and does not have chitinous cell walls. These characteristics set animals apart from all the other kingdoms of life: plants (which have cell walls, but make their own food), fungi (which have cell walls), protists (unicellular), monera (prokaryotic, unicellular).
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sounds like the dogs have sarcoptic mange (mites) and when the mites live on people they call it scabies. Take the dogs to the vet and have a skin scraping done, that'll tell you what it is for sure.