Part 2

It is the purpose of this booklet to discuss accurately the various poisonous dwellers of the desert, as well as to debunk some of the superstitions and misunderstandings which have developed.

A majority of the poisonous creatures in the desert are by no means restricted to that environment. Rattlesnakes, for example, so often associated with the arid regions of the West, occur in nearly every section of the United States.

“A poison,” states Encyclopedia Brittanica, “is a substance which, by its direct action on the mucous membrane, tissues, or skin, or after absorption into the circulatory system can, in the way which it is administered, injuriously affect health or destroy life.” A poisonous creature may be defined as one which produces a poison for the administering of which it has developed a special mechanism.

Since, due to personal differences, the bite or sting of a poisonous creature may injuriously affect the health of one person and not that of another, and since the poison of one individual creature may be insufficient to cause an unpleasant reaction, while that from several hundred might produce severe illness or even death, it is difficult to determine which creature should be included in a publication of this nature. The writer, therefore, has exercised his judgment in discussing in the following pages such creatures as he feels may offer a menace to the welfare of a visitor to the desert. In addition, a few paragraphs are included for the defense of several harmless desert dwellers which are mistakenly believed poisonous and which, as a result, have been mercilessly persecuted.

It should be understood that the author has not himself conducted scientific research among the desert animals regarding which he writes. The material in this book is a digest of the findings of various competent scientific and medical authorities, and has been carefully checked for accuracy and authenticity.

Don’t be frightened as a result of reading this booklet. The desert is just as safe—perhaps safer—for homemaking as many other parts of our country.

Giant desert centipede (Scolopendra heros)

Many species of centipedes of various sizes and colors are found throughout the world. The majority are small, harmless, and not sufficiently numerous to be considered seriously, even as pests.

Usually they are found under boards, in cracks and crevices, in basements and closets, and in other moist locations where they hide during the day and venture forth at night in search of small insects for food.

The large, poisonous desert centipede attains a length of 6 or even 8 inches and has jaws of sufficient strength to inflict a painful bite. Glands at the base of the jaw produce poison which causes the area about the bite to swell and become feverish and painful. Persons who have been bitten report that the swelling and tenderness may persist for several weeks, that the bite sometimes suppurates and is difficult and slow to heal.

Because the bite of even a large centipede is usually a painful inconvenience rather than a serious injury, no specific treatment has been developed. Application of an antiseptic such as iodine immediately following receipt of the bite, working it well into the fang punctures, is advised. Bathing the site of the bite with strong ammonia will bring relief if done immediately, while soaking the area in a solution of hot Epsom salts may shorten the period of discomfort. Prompt treatment by a physician will reduce duration and intensity of pain.

Although the bite of a large centipede is no joke, it is not cause for fear or worry. Exaggerated stories of the deadly effects of the bite, and reports that the tip of each leg carries a poisonous spur, have caused many persons to be overly afraid of centipedes. Hysteria and shock resulting from this unfounded fear probably have been the cause of more suffering than the bites themselves.

The tip of each of the 42 legs of the giant desert centipede is equipped with a sharp claw. It is possible when the centipede scurries across a person’s arm or leg for these claws to make pin-point punctures. Infection introduced through these tiny openings readily leads to the belief that poison has been injected. Prompt application of an antiseptic will greatly reduce the possibility of infection.

Scorpions

More deaths have occurred in Arizona from scorpion sting than from the bites and stings of all other creatures combined. It is apparent that scorpions are dangerous, that all persons should be informed regarding them, and that details of first-aid treatment should be common knowledge.

In some parts of the South, scorpions are called “stinging lizards.” This is unfortunate because it has caused many people to think of lizards as poisonous and capable of stinging.

Not all scorpions are deadly. Danger from the two deadly species (one shown above) which look so much alike that only an expert can tell them apart, is greatest to children under 4 years of age. Unless prompt action is taken small children might succumb to the poison from a single sting from an individual of either of the deadly species. Older children may die from the effect of several stings, and adults, especially those in poor health, may suffer serious injuries.

Of the more than 20 species of scorpions recorded in Arizona where detailed studies have been made, the two deadly forms have been found only across the southern portion of the State and in the bottom of Grand Canyon. As far as is now known, no other deadly species occur in the Southwest, except in Mexico where there are several.

It is important, then, that all persons should recognize the deadly species. Study the photograph. Note that the deadly species (left) is about 2 inches in length, is straw colored, and that its entire body, especially the joints of the legs, pincers, and “tail,” are long and slender. It has a streamlined appearance. This is in contrast with the stubby or chunky appearance of the many non-deadly species.

Scorpions sting, they do not bite. The pincers at the head end of the body are for the purpose of holding the prey, which consists primarily of soft-bodied insects, while the scorpion tears it to pieces with its jaws.

The sting is located at the extremity of the “tail” and consists of a very sharp, curved tip attached to a bulbous organ containing the poison-secreting glands and poison reservoir. The sting is driven into the flesh of the victim by means of a quick, spring-like flick of the “tail.” Muscular pressure forces the poison into the wound through two tiny openings very near the sting tip. Thus the poison is injected beneath the skin, making treatment difficult, as the impervious skin renders surface application ineffective.

Whereas the poison of non-deadly species of scorpions is local in effect, causing swelling and discoloration of the tissues in immediate proximity to the point of puncture, that of the deadly species is general over the entire body of the victim. There is intense pain at the site of the sting but very little inflammation or swelling.

According to Kent and Stahnke, “the victim soon becomes restless. This increases to a degree that, in cases of small children, the patient is entirely unable to cooperate with attendants. It turns, frets, and does not remain quiet for an instant. The abdominal muscles may become rigid, and there may be contractions of the arms and legs. Drooling of saliva begins, and the heart rate increases. The temperature may reach 103 or 104 degrees. Cyanosis (skin turning blue) gradually appears, and respiration becomes increasingly difficult, causing a reaction not unlike that observed in a severe case of bronchial asthma. Involuntary urination and defecation may occur. In fatal cases the above symptoms may become so marked that apparently the child dies from exhaustion.

“In cases that recover, the acute symptoms subside in 12 hours or less. In the adult, symptoms as enumerated may be encountered, but as a rule they are less severe. Numbness is usually experienced at the site of the sting. If one of the appendages is stung, the member may become temporarily useless. Two cases of temporary blindness have been experienced. Some patients complain of malaise (discomfort) for many days following the sting. One patient developed a tachycardia (rapid heart) lasting two weeks.”

Treatment of scorpion stings

Dr. Stahnke recommends the following treatment for a person stung by one of the deadly scorpions:

“First, apply a tight tourniquet near the point of puncture and between it and the heart.... As soon as possible, place an ice pack on the site of the sting. Have a pack of finely crushed ice wrapped in as thin a cloth as possible. Cover and surround the area for about 10 to 12 inches. After the ice pack has been in place for approximately 5 minutes, remove the tourniquet.

“If a person is stung on the hand, foot, or other region that can be submerged completely, place the portion, as soon as possible, in an ice-and-water mixture made of small lumps of ice (about half the size of ice cubes) in a proportion of half ice and half water. Treatment should not be continued longer than 2 hours.