''Carios erraticus'', formerly called ''Ornithodoros erraticus'', is a species of

tick Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Ticks are external parasites, living by ...

in the family

Argasidae The Argasidae are the family of soft ticks, one of the three families of ticks. The family contains 193 species, although the composition of the genera is less certain, and more study is needed before the genera can become stable. The currently a ...

. The tick was described by

Hippolyte Lucas Pierre-Hippolyte Lucas (17 January 1814 – 5 July 1899) was a French entomologist. Lucas was an assistant-natural history, naturalist at the Muséum national d'Histoire naturelle. From 1839 to 1842 he studied fauna as part of the scientific com ...

in 1849.

Description

The tick is native to the

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabian Peninsula, Arabia (including the Arabian Peninsula and Bahrain), Anatolia, Asia Minor (Asian part of Turkey except Hatay Pro ...

and

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...

. It is one of the more common soft ticks to bite humans. Their main food sources in

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

are

pig The pig (''Sus domesticus''), often called swine, hog, or domestic pig when distinguishing from other members of the genus '' Sus'', is an omnivorous, domesticated, even-toed, hoofed mammal. It is variously considered a subspecies of ''Sus ...

s; the tick has been found in pig pens in the provinces of

Salamanca Salamanca () is a city in western Spain and is the capital of the Province of Salamanca in the autonomous community of Castile and León. The city lies on several rolling hills by the Tormes River. Its Old City was declared a UNESCO World Heritag ...

Badajoz Badajoz (; formerly written ''Badajos'' in English) is the capital of the Province of Badajoz in the autonomous community of Extremadura, Spain. It is situated close to the Portuguese border, on the left bank of the river Guadiana. The population ...

, and

Huelva Huelva (, ) is a city in southwestern Spain, the capital of the province of Huelva in the autonomous community of Andalusia. It is between two short rias though has an outlying spur including nature reserve on the Gulf of Cádiz coast. The rias ...

. The only human habitats the tick can enter are places in poor condition.

Pathology

This species carries the pathogenic

Qalyub Qalyub ( arz, قليوب ; cop, ⲕⲁⲗⲓⲱⲡⲉ p.71) is a city containing a rural markaz, and an urban one. It is located in the Qalyubia Governorate of Egypt, in the northern part of the Cairo metropolitan area, at the start of th ...

and

African swine fever virus ''African swine fever virus'' (ASFV) is a large, double-stranded DNA virus in the '' Asfarviridae'' family. It is the causative agent of African swine fever (ASF). The virus causes a hemorrhagic fever with high mortality rates in domestic pigs; ...

es and the spirochetes ''

Borrelia crocidurae ''Borrelia'' is a genus of bacteria of the spirochete phylum. Several species cause Lyme disease, also called Lyme borreliosis, a zoonotic, vector-borne disease transmitted by ticks. Other species of ''Borrelia'' cause relapsing fever, and are ...

'' and ''

Borrelia hispanica ''Borrelia'' is a genus of bacteria of the spirochete phylum. Several species cause Lyme disease, also called Lyme borreliosis, a zoonotic, vector-borne disease transmitted by ticks. Other species of ''Borrelia'' cause relapsing fever, and are tr ...

''. When the tick is infected by ''B. crocidurae'', the disease affects its genetic organ, the

testes A testicle or testis (plural testes) is the male reproductive gland or gonad in all bilaterians, including humans. It is homologous to the female ovary. The functions of the testes are to produce both sperm and androgens, primarily testoster ...

in males and the

ovaries The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the body. T ...

in females. The tick transmits the African swine fever virus only in Spain and

Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...

. The tick feeds at night, ingesting

blood Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away from those same cells. Blood in the c ...

to repletion in about 15 minutes. Small mammals are the most common hosts; this species rarely bites humans, preferring other vertebrates. The tick has substances in its

saliva Saliva (commonly referred to as spit) is an extracellular fluid produced and secreted by salivary glands in the mouth. In humans, saliva is around 99% water, plus electrolytes, mucus, white blood cells, epithelial cells (from which DNA can be ...

, such as antihemostatic,

anti-inflammatory Anti-inflammatory is the property of a substance or treatment that reduces inflammation or swelling. Anti-inflammatory drugs, also called anti-inflammatories, make up about half of analgesics. These drugs remedy pain by reducing inflammation as o ...

, and

immunomodulator Immunotherapy or biological therapy is the treatment of disease by activating or suppressing the immune system. Immunotherapies designed to elicit or amplify an immune response are classified as ''activation immunotherapies,'' while immunotherap ...

y molecules, which help the tick get blood from the

host A host is a person responsible for guests at an event or for providing hospitality during it. Host may also refer to: Places * Host, Pennsylvania, a village in Berks County People *Jim Host (born 1937), American businessman * Michel Host ...

and transfer

pathogen In biology, a pathogen ( el, πάθος, "suffering", "passion" and , "producer of") in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ ...

s easily. Major factors in their feeding relationship are mating, recent feeding, and size. Some strains of

entomopathogenic fungi An entomopathogenic fungus is a fungus that can kill or seriously disable insects. Typical life cycle These fungi usually attach to the external body surface of insects in the form of microscopic spores (usually asexual, mitosporic spores also ...

have been found to be effective against this tick and others in the related genus ''Ornithodoros'' in a study which concluded the fungi could be used as

biocontrol Biological control or biocontrol is a method of controlling pests, such as insects, mites, weeds, and plant diseases, using other organisms. It relies on predation, parasitism, herbivory, or other natural mechanisms, but typically also invo ...

agents for argasid ticks; the name of this is called

hyperparasitism A hyperparasite, also known as a metaparasite, is a parasite whose host, often an insect, is also a parasite, often specifically a parasitoid. Hyperparasites are found mainly among the wasp-waisted Apocrita within the Hymenoptera, and in two oth ...

References

External links

** {{Taxonbar , from1=Q10442937 , from2=Q7103637 Ticks Argasidae Fauna of the Middle East Animals described in 1849 Taxa named by Hippolyte Lucas