…tes is crab louse found, which also goes by the Latin name Phthirus pubis. Crab louse has a mixed reputation as not only a pests but also a parasites that feed on human blood. Appearance The small louse is perfectly adapted to its peculiar way of life and therefore has no wings. Its head is designed for its blood-sucking purpose, which is why the mouthparts are built to stick and suck with, while the eyes are quite reduced. Also, the body bears th…
Search Results for: Crab louse
Louse flies
…Although louse flies is a type of fly, it is very similar in appearance to louse. A louse fly has a flattened body instead of a spherical or egg-shaped body that most flies have. Its skin is also leathery instead of the familiar, metallic-shiny surface of many flies. The louse fly has strong legs. Unfortunately, there are several species of louse flies, such as the lizard fly, also called Crataerina pallida, and the swallow bite, also called Crata…
The crab louse
…Crab louse Crab louse The crab louse is called Phthirus pubis or pubic lice. It’s easy to tell the difference between human lice and crab lice. The human louse has a large abdomen. The abdomen of the crab louse is wider than it is long and has small protuberances on each side. Crab louse nits are smaller than those of the head louse and the body louse, and the crab louse uses more glue to stick the nit to the hair….
Crab louse
Crab louse (Latin: Phthirius pubis) A crab louse is almost as broad as it is long. Its ‘claws’ are extraordinarily well developed and together with the shape of the body give it a crab-like appearance. Its preferred habitat is among the body hairs and particularly among the pubic hairs. The large claws are well adapted for gripping these very strong hairs. Crab lice can also occur in the armpits, in beards and sometimes on eyelids and eyebrows, a…
Ectoparasites
…r and the body louse, Phcorporis, which lives on the body and clothes. The crab louse, Phthirus pubis. P.3. The crab louse sucks blood and lives in the body hair of humans, especially on the abdomen. The crab louse is transmitted by intimate contact. The bed bug, Cimex lectularius. P.41. The bed bug feed on human blood, which they suck from us at night. They are found in heated homes and are transmitted when infested house hold effect are moved. T…
Crab louse bites
…outh inside the skin – also in the periods where it does not suck blood. Crab lice suck blood almost all the time. That is probably why they do not tolerate being away from their host for long periods of time. A single day without access to blood will cause them to die of hunger. Crab louse bites and their symptoms are similar to those from the head louse. However, crab louse bites are characterized by blue-colored spots, which may appear where th…
Sucking lice
…tory lice have been regarded as something that one lived with, and the job of delousing one another was an important part of family life. Two types of louse are adapted for living on man: the human louse and the crab louse. The human louse occurs in two forms, the body louse and the head louse, and these are very similar to one another. In fact they can only be distinguished with certainty by their habits….
The body louse
The body louse, Pediculus humanus corporis, is similar to the head louse. The differences that separate it from the head louse are small and uncertain. Even specialists may find it difficult to distinguish between the two subspecies. Body lice lay their nits in the clothes etc. we wear on the body. One can assume that lice on clothes are body lice. Body lice can be frequent in soldiers, refugees, who aren’t well-groomed etc. In Denmark today, bod…
Spreading of crab lice
…rson. However, there are cases of crab lice which cannot be explained by intercourse or sharing a bed. The lice rarely leave their host but they cause itching which can result in them being scratched off along with the hair they cling to. During the first few hours, those homeless crab lice might climb on to the other people who come into contact with the bedding, the clothing or the toilet seat on which the lice landed. Crab lice are no longer as…
Occurrence
…9. Twelve medium-sized and large crabs as silhouettes in natural size. The crab louse has adapted to sparse hair. The scalp hairs are too close (about 220 hairs / cm 2). The pubic hair (about 34 hairs / cm 2) is better suited for crab louse. The crab louse primarily live in pubic hair but is also seen in the hair on the chest and in armpits. On the head, crab louse live in the hair lines (neck and temples), in the scalp hair (thin-haired men), in…
Louse flies
…Fig. 43. The swift louse fly (left) and the Stenepteryx hirundinis (right). (Hutson). Louse flies The louse flies, of the family Hippoboscidae. They are obligate parasites of mammals and birds. They are flattened with leathery skin, and their legs have powerful claws that they use to hang onto their hosts. The species, which are most frequently found indoors, include the swift louse fly, Craetaerina pallida and the Stenepteryx hirundinis….
Body louse
…do not thrive among people who maintain a good standard of hygiene with frequent changing and washing of clothes. Body lice are important as vectors of typhus fever, trench fever and louse-borne relapsing fever. In populations where these diseases do not occur, the only effect of louse bites is the resultant annoying itch….
Lice in dogs
…tail. This canine louse is not very common in Denmark. If the dog has this louse, it often also has the biting louse at the same time. The other species of canine lice, the biting lice, Trichodectes canis, are more common than the sucking lice. It is not a bloodsucker; however, it still drinks blood. It bites a hole on the skin and drinks blood from the wound. The dog’s biting lice are up to 1.7 mm long and have a large, rounded head. They live on…
Lice
…discreet life. They are part of our special parasite fauna and for humans – as a species – it is natural to have lice. When most of us are free of lice from time to time, it is because we have chosen to fight them. Without active control we would all have lice. The crab louse is another species of louse specifically related to humans. The pediculus humanus and the crab louse are easy to control. Treatments are available over the counter at pharmac…
Index
…Thaumetopoea pinivora The American house dust mite The blue jellyfish The crab louse The Eastern Pine Processionary The European adder The European house dust mite The European viper The Greater weever The lesser weever The pigeon mite The red jellyfish The velvet mite The water scorpion Thrips Thunderblights Thunderbugs Thunderflies Thysanoptera Tick-para1ysis Ticks To feel lousy Tovinger Trachinus draco Trachinus vipera Trichodectes canis Trich…
Head louse
Head louse (Latin: Pediculus humanus var. capitis) The head louse attaches its eggs firmly to hairs close to the scalp. The eggs are extremely tenacious and can only be removed from the hair by using a fine comb and much effort. Even frequent washing of the hair may not be sufficient to remove them. The empty eggshells remain on the hair and move outwards as it grows. Under a lens they can be distinguished from unhatched eggs, because they are m…
Life cycle
…erwintering pupae, while the birds have migrated south during the winter. From the nests, the lice flies can sometimes stray into homes. This probably only happens if the birds, for some reason, leave the nest during the breeding season, or if the bird do not return to a nest in which louse flies are overwintering. Louse fly innovations happen in the months from April to August, mostly in June. Furthermore, you can get in contact with louse flies,…
The head louse
Fig 4. Head lice, male and female. (Grundy) Head louse The head louse, Pediculus humanus capitis, is a small, flat and elongated insect. The adult females measure 2.4 to 3.3 mm in length. Lice in other stages of their life and the males are smaller. In the front, there is a small head with a mouth and two antennae and two simple eyes. The chest has six legs. Each leg ends in a claw that can grasp a hair. The hind parts are multiarticulate and rel…
Dog louse
Dog Louse ( Latin: Linognathus setosus ) Although very similar to the human louse, there is very little chance of a human becoming infested with dog lice. Like their relatives these parasites are very much tied to their own specific host. They mostly live on the back, flanks and at the root of the tail of dogs. In addition to the irritation that they cause these lice are also intermediate hosts for one of the dog’s intestinal worms. The infection…
Where do the biting and irritating organisms come from?
…stomach or back, under a trouser belt, or under any restriction, are usually flea bites. Bites and itching around the genitals (or in the armpits) are normally due to crab lice. Characteristic blue spots may appear due to discoloration of the skin caused by the crab louse’s salivary secretions. Bites, at night, on thighs or shoulders will often be flea bites. Fleas like to crawl in beneath the body, and bite where it is in contact with the bedclo…
Index
…ra cerebella Copeognatha Corvus monedula Corynetes coeruleus Cossus cossus Crab louse Cranefly larvae Crataerina pallida Criocephalus rusticus Cryptolestesferrugineus Ctenocephalidesfelis Ctenocephalides canis Cu/ex pipiens Culicidae Culiseta annulata Davies’s Colletes Death-watch beetle Debris bug Delichon urbina Dendrobium pertinax Dendrocopus major Dermanyssus gallinae Dermatophagoides Dermestes frischi! Dermestes haemorrhoidalis Dermestes lard…
Lice bites
…nd sharp chitin teeth in the front of the tube. They act as barbs when the louse head is anchored to the skin. Then three long, elastic rods are shot through the tube and into the skin. The rods form a triangular channel leading saliva to the location, the rods hit. The louse sucks the blood using a muscle pump in the throat. Lice suck blood at least twice a day and preferably five times. At room temperature, the lice can only survive for two days…
Detection
…anding symptom of crab lice. Itching in the groin area can have many other causes (among the animals, the flagellate Trichomonas vaginalis or pin worm Oxyuris vermicularis, may cause itching. These two kinds of animals are not affected by crab louse treatment). The easiest way of detecting lice in beards, armpit hairs, chest hairs and pubic hair is to comb the hair with a fine-tooth comb. The comb will pull out the hairs which put up resistance an…
Frequency
… 0 0 1 0 Honey bee 0 1 0 Bumblebee 0 1 0 Horse-flies 1 0 Hornets 0 1 0 0 0 Cat fleas 0 1 0 0 Thrips 0 1 0 0 0 The crab louse 0 0 0 0 0 1 Bird mites 0 0 0 1 0 Hedgehog fleas 0 0 0 1 0 0 Head louse (Lat. Pediculus humanus capitis) 0 1 0 0 Bedbugs 0 0 0 1 0 0 Itch mites…
Lice in cats
…e species of feline lice: Felicola subrostrata, also called feline chewing louse. This louse will get up to 1.3 mm long and is characterized by its triangular head. As a biting lice, it is quite peaceful as it eats skin flakes, etc. This does not usually bother the cat. However, biting lice are active, and if there are many of them it bothers the cat. The feline chewing lice are uncommon in domestic, well-nourished cats and more common in wild cat…
Prevention and control
…Fig. 44. Louse flies are present from May to August, however they are mostly common in June. One should not refrain from having birds on the house out of fear for louse flies. The risk of them getting inside the house is, after all, very little. If they show up, they are easily eradicated with one of the usual pesticide sprays with pyrethrin. Treating nest environments with an insect powder will usually stop a louse fly infection….
Control
The treatments used against crab lice are the same as the once you use to eradicate head lice and body lice. Shampoos are most suitable because they do not sting the thin-skinned places. Apply on the body and on the scalp hair and eyebrows if these are also infected, however, do not apply on the eyelashes. For eradication of lice on the eyelashes, apply the eye ointment Ophtha twice a day for 8 days. The ointment as well as the other treatments f…
Where?
…nests, the following animals may bite: lyctocoris campestris, Martin bug, louse flies, bird fleas, mites on birds and pigeon mites. Cat fleas, itch mites and fur mites can attack a dog or cat. By bathing in stagnant water you may experience close encounters with the common backswimmer, the saucer bug and leeches. In sea water the biggest troublemaker is probably the stinging jellyfish. Greater weever stings may be experienced on the sandy bottom…
Forest flies
…boscidae) The insects in this family have an unattractive, flat body and a crab-like gait and they cling to their victims with powerful claws. At first sight they do not look very much like flies. They are specialised for living on mammals or birds, where they crawl around in the fur or among the feathers and suck blood. The proboscis is somewhat like that of a stable fly.. The larvae develop within the female’s body and pupate immediately they ar…
Bed bugs
…as no wings, which makes the abdomen clearly visible. The bed bug is not a louse, but a kind of tick. Most ticks feed on plant sap, but the bed bug uses its sharp proboscis to suck blood. About 75 different species of bed bugs are known, and it has been proven that they are all, in addition to the human, live on some birds and bats. That may seem a strange choice, but there is an explanation. Bed bugs do not live like the real louse on the body of…