NationMaster - Encyclopedia: Crab lice

Crab lice (singular, louse), scientific name Phthirus pubis and commonly called "crabs" due to their resemblance to the crab, are one of three kinds of human lice in the large group of lice families, the others being head lice and body lice, which live in clothing. They are wingless, about 1 to 3 mm long. They attach themselves to hair strands, and hatch out of pods with lids, or "nits". Ones that are too tightly attached to be brushed off must be removed by pulling with the nails or a fine tooth-comb. Image File history File links http://phil. ... The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ... // A00-A79 - Bacterial infections, and other intestinal infectious diseases, and STDs (A00-A09) Intestinal infectious diseases (A00) Cholera (A01) Typhoid and paratyphoid fevers (A010) Typhoid fever (A02) Other Salmonella infections (A03) Shigellosis (A04) Other bacterial intestinal infections (A040) Enteropathogenic Escherichia coli infection (A045) Campylobacter enteritis (A046) Enteritis due to Yersinia... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... The Diseases Database is a free website that provides information about the relationships between medical conditions, symptoms, and medications. ... MedlinePlus (medlineplus. ... eMedicine is an online clinical medical knowledge base that was founded in 1996. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Supfamilies See text Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short tail (Greek: brachy = short, ura = tail), or where the abdomen is entirely hidden under the thorax. ... Suborders Anoplura (sucking lice) Rhyncophthirina Ischnocera (avian lice) Amblycera (chewing lice) Lice (singular: louse) (order Phthiraptera) are an order of over 3000 species of wingless parasitic insects. ... The head louse Head lice (Pediculus humanus capitis) are one of the many varieties of sucking lice (singular louse) specialized to live on different areas of various animals. ... ...

General information

The crab louse can live in almost any form of human hair, but is found most commonly in pubic hair, leading to its other common name of pubic louse. Its legs are adapted to climbing along relatively widely spaced hairs, and so can be found in eyelashes, pubic hair, beards, moustaches, and even armpit hairs. The individual louse can survive for about 24 hours apart from its necessary human host, so that crab lice can be passed on in sleeping bags and bedding. The female may lay up to 40 eggs at a time, resulting in a fluctuating but growing population. The louse feeds on blood and can leave irritating spots on the skin, sometimes mistaken for pimples, a condition called Pediculosis pubis. Trinomial name Homo sapiens sapiens Linnaeus, 1758 Humans, or human beings, are bipedal primates belonging to the mammalian species Homo sapiens (Latin for wise man or knowing man) under the family Hominidae (the great apes). ... A closed eye, displaying lashes The eye now open â€” lashes less visible An eyelash or simply lash is one of the hairs that grow at the edge of the eyelid. ... Pubic hair is hair in the frontal genital area, the crotch, and sometimes at the top of the inside of the legs; these areas form the pubic region. ... Abraham Lincoln was the first American President to wear a beard in office. ... Edgar Allan Poe had a simple moustache. ... Armpit Hair Media declaring female armpit hair as a scandal Armpit hair is the composition of hair in the underarm area. ... Human blood smear: a - erythrocytes; b - neutrophil; c - eosinophil; d - lymphocyte. ... Pediculosis is an infestation of lice -- which are parasitic insects -- on the bodies of humans. ...

Pubic lice have legs that are spaced further apart than head lice; this is an adaptation that enables them to move around more easily in their habitat. The eye is an adaptation. ...

The female louse glues her eggs, called nits - nits look like tiny white beads - to hair shafts. Lice bite through the skin to suck blood, and the bite causes itching. Bites can become secondarily infected; scratching may break the skin and help cause this kind of infection. The most common symptom of crab lice is itching of genital area. The Nits are a Dutch art rock group, founded in the mid 1970s. ... Human blood smear: a - erythrocytes; b - neutrophil; c - eosinophil; d - lymphocyte. ...

Pubic lice are most commonly spread by sexual contact and are considered a sexually transmitted disease, but can also be spread by sharing clothes or bedding. Pubic lice can not be spread by sitting on a toilet seat, contrary to popular myth - lice do not have the proper body structure to maneuver over smooth surfaces.^[1] Also, lice must be near a human body to be able to sustain life, as they die within 1-2 days after no contact with humans. Sexually transmitted diseases (STDs)â€” also known as sexually transmissible diseases, sexually transmitted infections (STIs) or (infrequently) venereal diseases (VD) â€” are diseases or infections that have a significant probability of transmission between humans by means of sexual contact: vaginal intercourse, oral sex, and/or anal sex. ... (See also List of types of clothing) Introduction Humans often wear articles of clothing (also known as dress, garments or attire) on the body (for the alternative, see nudity). ... A bed sheet is a large rectangular piece of cotton or linen cloth bed cover. ... Toilet found in a Boeing 747 aircraft A toilet is a plumbing fixture and a disposal system primarily intended for the disposal of the bodily wastes; urine, fecal matter, vomit and menses. ...

Life cycle

There are three stages in the life of a pubic louse: the nit, the nymph, and the adult.

Treatment

Pubic lice are easily killed with a 1% permethrin or pyrethrin lice shampoo, but the pubic hair must be shaved or combed with a fine-toothed comb to remove the nits. Lice can survive in bedding and clothing, so these items must be treated, sterilized, or contact with them must be avoided for two weeks, after which time any lice will have died. Permethrin is a common chemical, widely used as an insecticide and acaricide and as an insect repellent. ... Pyrethrum (Chrysanthemum cinerariaefolium, Family Asteraceae) is a perennial African plant with a daisy-like appearance and white, pink or red flowers. ... Several shampoos on a shower window Shampoo (Hindi: à¤¶à¤®à¥à¤ªà¥‚) is a hair care product used for the removal of oils, dirt, skin particles, environmental pollution and/or other contaminant particles that gradually build up in hair. ... A comb A comb for people with hair loss. ...

Lindane (1%), another pediculocide, is not recommended for pregnant or nursing women or for children less than 2 years old. Lindane is an insecticide, also known as gamma-Hexachlorocyclohexane (HCH) and benzene hexachloride (BHC). ... A pregnant woman Pregnancy is the process by which a mammalian female carries a live offspring from conception until it develops to the point where the offspring is capable of living outside the womb. ...

References

The Centers for Disease Control and Prevention (CDC) in Atlanta is recognized as the lead United States agency for protecting the public health and safety of people by providing credible information to enhance health decisions, and promoting health through strong partnerships with state health departments and other organizations. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 21 is the 233rd day of the year (234th in leap years) in the Gregorian Calendar. ...

External links

Categories: Lice | Parasites | Sexually-transmitted diseases Sexually transmitted diseases (STDs)â€” also known as sexually transmissible diseases, sexually transmitted infections (STIs) or (infrequently) venereal diseases (VD) â€” are diseases or infections that have a significant probability of transmission between humans by means of sexual contact: vaginal intercourse, oral sex, and/or anal sex. ... Subgroups Actinobacteria Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Bacteria (singular: bacterium) are a major group of living organisms. ... Binomial name Haemophilus ducreyi (Neveu-Lemaire 1921) Bergey et al. ... Binomial name Haemophilus ducreyi A chancroid is an STD characterized by painful sores on the genitalia. ... Chlamydia is a common term for infection with any bacteria belonging to the phylum Chlamydiae. ... Binomial name Chlamydia trachomatis Busacca, 1935 Chlamydia trachomatis is a species of the chlamydiae, a group of obligately intracellular bacteria. ... Granuloma inguinale or Donovanosis is a bacterial disease caused by the organism Calymmatobacterium granulomatis. ... Lymphogranuloma venereum (LGV), also known as lymphopathia venerea, tropical bubo, climatic bubo, strumous bubo, poradenitis inguinales, Durand-Nicolas-Favre disease and lymphogranuloma inguinale, is a sexually transmitted disease caused by the invasive serovars L1, L2, or L3 of Chlamydia trachomatis. ... Binomial name Chlamydia trachomatis Busacca, 1935 Chlamydia trachomatis is a species of the chlamydiae, a group of obligately intracellular bacteria. ... Gonorrhoea (gonorrhea in American English), slang term the clap, is among the most common curable sexually transmitted diseases in the world and is caused by the Gram-negative bacterium called Neisseria gonorrhoeae. ... Binomial name Neisseria gonorrhoeae Zopf, 1885 Neisseria gonorrhoeae is a species of Gram-negative (see also Gram Stain) bacteria responsible for the disease gonorrhoea. ... Syphilis is a sexually transmitted infection (STI) caused by a spirochaete bacterium, Treponema pallidum. ... Binomial name Treponema pallidum Schaudinn & Hoffmann, 1905 Treponema pallidum is a spirochaete bacterium. ... Binomial name Ureaplasma urealyticum Shepard et al. ... Divisions Chytridiomycota Zygomycota Ascomycota Basidiomycota The Fungi (singular: fungus) are a large group of organisms ranked as a kingdom within the Domain Eukaryota. ... Candidiasis, commonly called yeast infection or thrush, is a fungal infection of any of the Candida species, of which Candida albicans is probably the most common. ... Wikisource has an original article from the 1911 EncyclopÃ¦dia Britannica about: Protozoa Protozoa (in Greek proto = first and zoa = animal) are single-celled eukaryotes (organisms whose cells have nuclei) that commonly show characteristics usually associated with animals, most notably mobility and heterotrophy. ... Trichomoniasis, sometimes referred to as trich or the ping pong disease, is a common sexually transmitted disease that affects 2 to 3 million Americans yearly. ... Binomial name Trichomonas vaginalis (DonnÃ© 1836) Trichomonas vaginalis, an anaerobic, parasitic flagellated protozoan, is the causative agent of trichomoniasis, and is the most common pathogenic protozoan infection of humans in industrialized countries. ... Parasitism is an interaction between two organisms, in which one organism (the parasite) benefits and the other (the host) is harmed, though usually without killing the host. ... Groups I: dsDNA viruses II: ssDNA viruses III: dsRNA viruses IV: (+)ssRNA viruses V: (-)ssRNA viruses VI: ssRNA-RT viruses VII: dsDNA-RT viruses A virus (Latin, poison) is a microscopic particle that can infect the cells of a biological organism. ... Acquired Immunodeficiency Syndrome or Acquired Immune Deficiency Syndrome (AIDS or Aids) is a collection of symptoms and infections in humans resulting from the specific damage to the immune system caused by the human immunodeficiency virus (HIV). ... Human immunodeficiency virus (commonly known as HIV, and formerly known as HTLV-III and lymphadenopathy-associated virus[1][2]) is a retrovirus that is the cause of the disease known as AIDS (Acquired Immunodeficiency Syndrome), a syndrome where the immune system begins to fail, leading to many life-threatening opportunistic... Cervical cancer is a malignancy of the cervix. ... Genital warts (or condyloma, or condylomata acuminata) is a highly contagious sexually transmitted infection. ... The naked protein coat (capsid) of a papillomavirus HPV redirects here. ... Originally known as serum hepatitis, hepatitis B has only been recognized as such since World War II, and has caused current epidemics in parts of Asia and Africa. ... The Herpes simplex virus infection (common names: herpes, cold sores) is a common, contagious, incurable, and in some cases sexually transmitted disease caused by a double-stranded DNA virus. ... Molluscum contagiosum are wart-like tumors of the skin caused by the molluscum contagiosum virus (MCV-1 to -4), a DNA poxvirus. ... Inflammation of the tissues of the cervix is known as cervicitis. ... Epididymitis is a medical condition where the epididymis becomes inflamed. ... Infertility is the inability to naturally conceive a child or the inability to carry a pregnancy to term. ... Non-gonococcal urethritis (NGU) is an inflammation of the urethra which is not caused by gonorrheal infection. ... Pelvic inflammatory disease (or disorder) (PID) is a generic term for infection of the female uterus, fallopian tubes, and/or ovaries. ... Premature birth (also known as preterm birth, or premie) is defined medically as childbirth occurring earlier than 37 completed weeks of gestation. ... Proctitis (Noun) Inflammation of the rectum. ... Prostatitis is any form of inflammation of the prostate gland. ... Reactive arthritis is a condition with symptoms similar to arthritis or rheumatism. ... Urethritis is an inflammation of the urethra. ...

Contents

General information GA_googleFillSlot("encyclopedia_square");

Life cycle

Treatment

References

External links

General information