Hobo Spiders

angela martinez asked:

Seeing spiders in your home is an unsettling thing. It’s not something you dwell on until you pick up a shirt off the floor to put in the laundry and a big ugly spider jumps down to the floor and runs away. The natural response is to scream and jump away. Every hair on your body stands on its ends. Suddenly you see every teeny tiny creature that you might not have noticed before and you feel like they are crawling all over your body. It can take days to get over an incident like that. You find yourself shaking out your pants before you put them on and looking in every box before you stick your hand in it. When really, these should probably be regular practices.

Many spider are harmless, but on of the most dangerous is the brown recluse spider. They are called the brown recluse, because they like to hide out during the day. Hence the name recluse.

They generally occupy dark and undisturbed areas. They can be found indoors or outdoors. Indoors they are commonly found in attics, basements, crawl spaces, cellars, closets, and heater vents. They will find a storage box, shoe, clothing, folded linens, or even your sheets to hide. Outdoors they like to live under logs, loose stones and stacks of lumber. They are not aggressive spiders by nature. Some common ways people have been bitten is by rolling over one in your bed while sleeping, touching one accidentally while cleaning out your storage area or putting on an old pair of shoes that a brown recluse spider has made a home in.

Preventing Spider Bites

There are steps to avoid getting a bite from a brown recluse spider.

Shake out clothing and shoes before getting dressed. Inspect bedding and towels before use. Wear gloves when picking up firewood, lumber, and rocks, but be sure to check the gloves for spiders first. Bed skirts are nice looking, but they are great for spiders to crawl up. Move the bed away from the wall slightly. Storage under the bed are handy, but they make a great dark place for brown recluse spiders to live. Be careful when picking up cardboard boxes. Recluse spiders like to hide under the folded cardboard flaps.

Keep Spiders Out

The best way to avoid brown recluse spider bites is to keep them outside and away from your house.

Windows and doors must be tight-fitting. Door sweeps are a must. Use seal or caulk cracks that the spider can use to get into your house. Your lights outside can attract bugs and spiders like to eat bugs. So the best kind of light bulbs are yellow or sodium vapor light bulbs. They attract less bugs. Seal off the edges of your cardboard boxes to keep the spider out or use plastic bags that can seal to store things in your garage, basement and attic. Get rid of trash, old boxes, old clothing, wood piles, rock piles, and other things you don’t want. Clean your closets out. Throw away and organize them. Move your wood away from the side of the house. Stack it as far away as you can. Brown recluse prefer to eat dead insects, so clean them up as soon as you notice them.

This is the best defense with the brown recluse spider. You have the knowledge and know how, now you just have to put these practices into place. Whether you have brown recluse or not, this will help with all spiders and you might just have an organized house as a bonus. So put you gloves on and get to work!

The American College of Forensic Examiners asked:

Toxic, harmful, environmental influences threaten human existence. Backyards, parks, and wilderness areas, so inviting and natural, also pose dangers to humans in the form of toxic spider bites or illnesses spread from animals to humans.

In forensic medicine, when causes of morbidity and mortality have to be uncovered, circumstantial

evidence may point to a toxic or infective arthropod bite, and knowledge of the victim’s signs and symptoms and of the suspected culprit determines the course of the investigation.

Patients and doctors alike are known to quickly blame severe ulcers and other consequences of alleged bites on the brown recluse spider; however, incorrect diagnosis and litigation can result from such a presumption (Kunkel, 1985; Vetter, Cushing, Crawford, & Royce, 2003). Yet, warnings against over-diagnosing have led some to under-recognize the spider’s potentially lethal bite, should it actually occur.

Clinically, the causes of skin ulcers are often

unknown and as a consequence, appropriate therapies are delayed (Isbister & Whyte, 2004;

Weenig, Davis, Dahl, & Su, 2002). In assumed

arthropod bites or stings, the dermal and systemic

effects from arachnids and insects of the order hymenoptera (bees, wasps, ants) have to be differentiated. Only a few spider genera inflict

necrotizing lesions (Vetter & Visscher, 1998).

Ticks, also grouped with the arachnids, not only transmit infections, but can secrete toxins of danger to humans. A bite by an Ornithodoros coriaceus (“pajahuello”) of California, a venomous

soft tick, is associated with necrotic lesions resembling those produced by brown spiders, including the brown recluse, genus Loxosceles

(Dooley, 1967; Lewis, 1967; Russell & Waldron,

1967; Vetter & Visscher). Infectious tick bites

can be confused with other arthropod bites before

serological testing is completed. Such confusion

has occurred in cases where Lyme disease is masquerading as a brown recluse (Osterhoudt, Zaoutis, & Zorc, 2002; Rosenstein & Kramer,

1987) or hobo spider bite (Vest, 1993a). Further,

suspected Cheiracanthium spider bites have mimicked African tick-bite fever (Newlands &

Atkinson, 1990).

The skin-tissue damage, which resembles that of a brown recluse spider bite, as well as the systemic effects of being bitten by the hobo spider in the United States, are described below. Note that the spider’s toxicity to humans is not proven (Binford, 2001; Isbister & White, 2004).

The diversity of bite symptoms attributed to this spider (Akre & Myhre, 1991) and the particularly severe systemic reactions (Fisher, Kelly, Krober, Weir, & Jones, 1994; U.S. Department of Health and Human Services, 1996; Vest, 1989, 1993b) known worldwide to stem from agelenids, suggest other possible causes, such as tick exposure.

The Myth of Necrotic Arachnidism

The brown recluse spider bite is often erroneously

linked to cases of dying skin tissue, even in geographical areas of the United States where

the spider is not found, which has hindered or

confused diagnostic accuracy (Russell, 1986;Swanson & Vetter, 2005; Vetter, 2000, 2005;

Vetter & Barger, 2002; Vetter & Bush, 2002a,b; Vetter, Cushing, et al., 2003; Vetter, Edwards,

& James, 2004). The hobo spider also falls victim

to false accusations (Bennett & Vetter, 2004;

Vetter, 2000; Vetter & Isbister, 2004; Vetter, Roe, et al., 2003).

Local infections, skin cancers, plant poisoning

(i.e., poison ivy), Lyme disease, tularemia, pyoderma gangrenosum, and other conditions have

been known to masquerade as necrotizing spider

bites (Bennett & Vetter, 2004; Swanson & Vetter, 2005) or as the tick-borne illness Rocky Mountain spotted fever (Erickson, Hryhorezuk, Lipscomb, Burda, & Greenberg, 1990; Vetter, Cushing, et al., 2003).

Necrotic arachnidism, when diagnosed without

substantiated proof of a spider bite and when obscuring other reasonable causes, has been viewed as a modern myth (Isbister, 2004; Kunkel, 1985; Vetter, 2004; Vetter & Bush, 2002a; White, 1999). The alleged skin-tissue death caused by the Brazilian wolf spider (a Lycosa species), the Australian white-tail spider (a Lampona species), and the hobo spider of northwestern Pacific regions provides examples of the myth (Isbister, 2004; Vetter, 2004; Vetter & Bush, 2002a). Verified envenomation case studies have shown that the Brazilian wolf spider (Ribeiro, Jorge, Piesco, & De Andrade Nishioka, 1990) and the white-tail spider (Isbister & Gray, 2003) do not cause necrosis. In alternative medicine, prevailing historical myths about wolf spiders regarding their alleged neurotoxic (Richardson-Boedler, 2001) and severe necrotic effects (Richardson-Boedler, 2002) have been discredited.

For the purposes of clinical descriptions and

the establishment of diagnostic guidelines, only

verified cases of spider bites, when the culprit

species are identified, are acceptable (Anderson,

1991; Bennett & Vetter, 2004; Binford, 2001;

Isbister, 2002; Isbister & White, 2004; Vetter

& Bush, 2002a, b; Vetter & Isbister, 2004).

Documentation, study, and comparison of case

data of probable envenomation enhance understanding of whether and what other etiologies

may be involved.

Agelenidae Family

Tegenaria agrestis, or the Hobo spider, of the

Agelenidae family, came to the United States

from Europe in the early 1900s and was first collected in 1930 in Seattle, Washington (Exline,

1936). The species has become established in the

Pacific Northwest and bordering regions: Oregon,

Washington, Idaho, northern Utah, western

Montana, western Wyoming, Colorado (isolated

populations), and southern British Columbia(Vetter, Roe, et al., 2003). These regions do not overlap with the geographical regions endemic for spiders in the Loxosceles genus, though recently, as reported by Vetter (2005), a specimen of Loxosceles rufescens was submitted from Colorado.

Of the genus Cheiracanthium in the Agelenidae

family, rarely associated with dermal necrosis,

C. mildei and C. inclusum occur in the Pacific

Northwest, as well (Akre and Myhre, 1991). Yet,

Vest (1987b) has noted that Cheiracanthium spiders

were only rarely found in areas infested with T. agrestis spiders, and where necrotic a rachnidism had occurred, victims did not report painful bites, as are caused by Cheiracanthium spiders.

Symptoms of Probable T. agrestis (Hobo Spider)

Envenomation

Despite decades of cohabitation with T. agrestis,

only a few suspected bites between the 1980s

and 1990s have been documented, casting doubt

on the spider’s implication (Vetter & Isbister,

2004), though the bites generally occurred in or

around dwellings where T. agrestis spiders were

found (Fisher et al., 1994; Sadler, Force, Solbrig, & Sommer, 2001; U.S. Department of Health

and Human Services, 1996; Vest, 1987b). Local

and systemic reactions typically include absence

of strong pain; formation of a skin inflammation,

with small central area of induration (a hardened mass or formation); and blistering at the bite site (15–35 hours post-bite). A day later, symptoms include sloughing of blistering skin

and serumal oozing, followed by eschar formation

(observed in dried lesions) and development of sub-scab necrosis (Fisher et al.; Vest, 1987b).

Local edema may occur (Akre & Myrhe, 1991; Vest, 1987b), and lesions may be oblong or elliptical

due to gravitational drift (Vest, 1987b).

The necrosis has been observed to be severe in

fatty areas, and healing has taken up to 2 or 3

years (Vest, 1993b).

Local reactions that diverge from the typical

course have been attributed to the T. agrestis

bite. These reactions include both local edema

spreading to the affected limb or part (Akre &

Myhre, 1991; U.S. Department of Health and Human Services, 1996) and delayed onset of edema (within weeks or months post-bite) (Akre & Myhre).

Systemic symptoms, such as headache, nausea,

influenza-like aches and pains (including

arthralgia), weakness, and dizziness/mental confusion, may occur on the day of the bite or on

the first or second day post-bite, possibly persisting for several days (Akre & Myhre, 1991;

Vest, 1987b). Fever has occurred during the days

following the bite (Akre & Myhre) and up to 7

days post-bite (U.S. Department of Health and

Human Services, 1996).

Muna wa Wanjiru asked:

Living in both Europe and North America, hobo spiders are a species that prefers moderate climates, making their nests both in houses and outside, in gardens, hedges, fields and pastures. In the United States, hobo spiders are considered a real danger since their bite can cause severe necrosis; nevertheless, the reported cases are pretty rare, as the most likely symptoms to appear include local pain, itching and swelling of the bitten area. Aloe vera, ice chips and antibiotics applied on the bite are thought to reduce the discomfort and speed up healing; yet, none of them is considered a 100% reliable remedy for hobo spider bites.

The consequences of the exposure to the venom of hobo spiders are less serious than the bites of the brown recluse spider for instance. However, people who have been bitten may expect to experience headaches and a general feeling of malaise. Sometimes, even vision problems have been reported, but under such circumstances you should contact the doctor right away and receive professional help. Nevertheless, it is a good idea to stay calm since anxiety adds up to the severity of the symptoms and that is surely the last thing you’d like to do. One further mention here is that many of the “dangers” related to hobo spiders are in fact rumors and anecdotes found on the Internet.

Hobo spiders definitely do not deserve the label of aggressiveness, and presently, there are trends of opinion among scientists related to the real danger of this species for humans: there are some who actually claim that hobo spiders are no threat to humans. The only time when hobo spiders are really dangerous is when they are laying their eggs, particularly if they see you as a threat to their future siblings. It is also good to know that these creatures seldom inject any venom when they bite, which is why there is little health risk and discomfort.

Even if hobo spiders live both on the American and the European continents, there is no difference in terms of physical specificity or venom composition. The treatment of the hobo spider bite is common with any other procedure applied to puncture wounds; let the bite bleed so as to eliminate as much venom as possible and then clean it with some topical antiseptic. Even if the bite may be itchy, try not to scratch since you may cause an infection of the deep tissues; do not apply cold or hot packs on the hobo bite since such measures are likely to increase tissue damage.

Muna wa Wanjiru asked:

Like other insect injuries, brown recluse spider bites are likely to cause lots of discomfort as they are behind the majority of necrotic wounds reported in the United States on a yearly basis. Though the spider species in question is pretty common and not aggressive, sometimes, their venom has a great impact on the system triggering a very violent response not only at the skin level but in the deep body structures as well. How can one treat brown recluse spider bites?

In order to control inflammation, you should apply some ice on the bite; aloe vera ointment or fresh aloe juice could also help you soothe the pain or the itching. Nevertheless, besides this self-treatment you should also seek professional medical health since brown recluse spider bites are not to be taken lightly. Other measures meant to improve the victim’s condition include the elevation or the immobilization of the body part if the bite has been made on one of the limbs.

Though many patients fail to turn to medical intervention for the matter, the use of antihistamines, anti-venom and antibiotics can prove of great help. Yet, we should nevertheless mention the fact that research on none of these treatments has been conclusive enough to be established as a general remedy for the brown recluse spider bites. In the majority of cases the wound is likely to heal without any medical intervention whatsoever, however, the exception appears in the cases when the venom spreads in a blood vessel.

It is not unusual to misdiagnose various skin infections as brown recluse spider bites, since the symptoms are very often miscellaneous. Statistics show that 80% of the brown recluse spider bites are misdiagnosed. A test has been created to identify the wound and the venom type, but the practice is not part of the medical routine yet. Lots of doctors recommend a minor surgical intervention in the tissue area affected by the venom, yet the excision could impair the recovery as such and may increase the risk of scarring.

The curious fact is that lots of brown recluse spider bites have been reported in parts of America where this species does not live. There are other spider varieties to blame for the matter, but none of them causes necrosis, not even the Hobo spider, that is often held responsible. The brown recluse spider bites are the only ones to cause necrosis but in very rare situations and when the immunity of the victim is very low.

angela martinez asked:

As small as these little creatures are, it’s amazing what a rucus they can cause. Many spiders are harmless, but there are some common spiders that should truely be feared. It is important to be able to identify spiders that are poisonous and the symptoms spider bites can cause. It would be an excellent idea to place some glue traps around your house, to help you identify what types of spiders you have living with you. As it is hard to get a close look at them when they are running across your floor or when they are squished in a tissue or under your shoe.

The Hobo Spider

The hobo spider has a brown body and can grow from 1/4 to 5/8 inch in length. It is commonly found in Idaho and Utah. It is a European immigrant that has recently been implicated as a potentially poisonous spider in the United States. They live in funnel web. Most hobo spider bites occur in bed or clothing where the spider is trapped next to the skin.

The initial bite from a hobo spider is usually painless but hardens within 30 minutes. The area of the bite may have numbness and it is common to feel dizzy. After 15 to 35 hours the area forms blisters and can start to slough, which stops after about 24 hours. It causes a slow healing wound. It can take months to heal. The hobo spider bites is not considered to be fatal but fatalities have occurred.

The Brown Recluse

The Brown Recluse spider is one of the few dangerous spiders in the United States. It is also called the fiddle back spider or violin spider because of the violin shape mark on it. It’s native to south central United States but can be commonly found in the central mid western states. It is best to use glue traps for brown recluse, because they are not affected by pesticides.

The initial bite from a Brown Recluse spider is usually painless and the victim can be unaware for 3 to 8 hours later. Then the site of the bite might turn red and swollen. The bite can take a long time to heal. It will often leave scaring. It is extremely rare for a fatality to occur from a brown recluse spider bite but they still must be treated as a dangers spider

Black Widow

Adult female black widow spiders are about 1/2-inch long, not including the legs. They are jet black with a red hourglass marking underneath their circular abdomen. The adult males are around half the size of the females. Females can be identified by their red dots and white lines along the abdomen. The male black widow spider is harmless. It’s the females you have to watch for. In spring or summer the black widow start to mate.

A black widow spider bite can go unnoticed. The intensity of the pain depends on amount of venom injected and the area of the bite. The bloodstream carries the venom around the body and it acts on the nervous system, causing different levels of pain. There may be slight local swelling and two red puncture points from the fangs. Pain usually starts from the bite site and works it way to the abdomen and back causing severe cramping in the abdominal muscles in some cases. Less than 5 percent of black widow spider bites results in death.

Wolf Spiders

Wolf Spiders are a common household pests that look for a warm place to stay for wintertime. They do not spin webs but they hunt for food at night. The Wolf Spider can be commonly mistaken for brown recluse spider, but they lack the violin-shaped marking behind their head. They are not aggressive and will run away from disturbances.

With wolf spider bites you will feel some local pain. Itchiness, dizziness, nausea, and swelling are uncommon, but they can be symptoms.

If a spider bite does occur, always contact a your physician. If it’s possible, try to catch the spider or at least get a good description of the spider. This will aide the doctors to know how to handle the bite more quickly.

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Jacob Saxbury asked:

As small as these little creatures are, it’s amazing what a rucus the can basis. Many spiders are safe, but there are some general spiders that should truely be feared. It is important to be able to discover spiders that are vicious and the symptoms spider bites can grounds. It would be an excellent idea to place some glue traps around your house, to help you identify what types of spiders you have lived with you. As it is hard to get a close look at them when they are operations across your stump or, when they are squished in a tissue or under your shoe.

The traveler spider has a bronzed body and can grow from 1/4 to 5/8 edge in extent. It is generally found in Idaho and Utah. It is a European migrant that has lately been implicated as a potentially lethal spider in the United States. They live in focus web. The hobo spider bites arise in bed or clothing where the spider is attentive next to the skin.

The primary piece from a hobo spider is commonly painless but hardens within 30 summary. The topic of the prick may have deadness and it joint to feel dizzy. After 15 to 35 hours the field forms blisters and can outset to marsh, which stops after about 24 hours. It causes a lengthy remedial wound. It can take months to settle. The hobo spider bites is not considered to be lethal but fatalities have occurred.

The Brown Recluse spider is one of the few hazardous spiders in the United States. It is also called the fiddle back spider or violin spider because of the violin influence smear on it. It’s native to south pivotal United States but can be commonly found in the inner mid western states. It is best to use glue traps for russet loner, because they are not unnatural by pesticides.

The first spiciness from a Brown Recluse spider is commonly painless and the victim can be ignorant for 3 to 8 hours later. Then the location of the gnaw might stroll red and inflamed. The taster could take a long time to heal. It would often allow scaring. It is very atypical for an overthrow to appear from a bronzed loner spider sting but they still must be treated as the dangers spider

Adult female black widow spiders are about 1/2-crawl long, not counting the legs. They jet black with a red hourglass marking underneath their circular abdomen. The adult males are around half the volume of the females. Females can be identified by their red dots and pasty ranks along the abdomen. The gentleman blacked widow spider is innocent. It’s the females you have to inspect for. In jump or summer the black widow shrink to mate.

A black widow spider chewed can go ignored. The intensity of the bind depends on amount of spite injected and the matter of the prick. The bloodstream carries the poison around the body and it acts on the anxious procedure, causing different levels of grief. There may be slim confined puffiness and two red penetrate points from the fangs. Pain usually starts from the maul location and mechanism it way to the abdomen and back causing plain cramping in the abdominal muscles in some gear. Less than 5 percent of black widow spider bites results in death.

Wolf Spiders are a mutual household vermin that look for a convivial place to continue for wintertime. They do not spin webs but they search for food at night. The Wolf Spider could be commonly mistaken for brunette hermit spider, but they require the violin-shaped marking behind their chief. They are not aggressive and will run away from disturbances.

With consume spider bites you will feel some home drag. Itchiness, giddiness, sickness, and swelling are uncommon, but they can be symptoms.