Category Archives: Mexico

Valley Fever in Arizona, California, Texas, Mexico, Central and South America

Valley Fever distribution-see green areas on map|Wikipedia
Called “The Devil in the Dust” in the April, 2012, issue of St. Joseph’s Magazine, Valley Fever is caused by the coccidioides fungi species that grows in the soil of Arizona and other dry desert areas of the southwestern United States, including central California, southern Utah, Nevada, and Western Texas around El Paso. Valley Fever also occurs in the Pacific costal region of Mexico and Central and South America.

Allergy Climates first brought you an item submitted by one of our readers about Arizona Valley Fever in our June 6, 2007, post. Recently, when a reader commented about Valley Fever here at Allergy Climates, I was reminded that we are long overdue for an update. Progress has been made in research of the disease in the past five years, yet it continues to spread in the affected areas when soil carrying Valley Fever spores, also called arthroconidia, are dispersed into the air by farming, construction, and wind storms, then breathed into the lungs.

Valley Fever spores
Valley Fever (arthroconidia) spores|courtesy Wikipedia

Symptoms may be so slight the infection is only discovered by a later positive skin or blood test, or nodules on the lungs, according to a Mayo Clinic article which reads, “Although the nodules typically don’t cause problems, they can look like tumors on X-ray.” According to this article, symptoms resemble those of the flu, sometimes accompanied by a rash, and can become chronic with low-grade fever, weight loss, cough, chest pain, and, as previously mentined, lung nodules. In its most serious form, the infection disseminates (spreads) to the skin (nodules and ulcers), bones, joints, and brain. Filipinos, Hispanics, blacks, Native Americans, and Asians, along with pregnant women, diabetics, and people with weakened immune systems are more likely to develop the serious forms of the disease according to the Mayo Clinic article.

The April, 2012, issue of St. Joseph’s Magazine reports that “approximately one third of those exposed to the spore will contract valley fever.” According to this report, the disease kills 35-45 people per year in Arizona alone, and can leave people disabled for life. This issue features the new Valley Fever Center on the campus of St. Joseph’s Hospital and Medical Center in Phoenix. The new Center is directed by John Galgiani, M.D., who also founded The Valley Fever Center for Excellence in Tucson in 1996. The April issue also includes pictures of recent Arizona dust storms, as well as current information about Arizona’s Valley Fever.

According to the May 1, 2007, issue of Clinical Infectious Diseases, the condition which would later be known as Valley Fever (Coccidioidomycosis) was first discovered by a medical student in Buenos Aires in 1892. The patient was an Argentinian soldier who had been experiencing worsening skin lesions for about three years. Soon afterward, an immigrant from the Azores who was working in agriculture in the San Joaquin Valley developed similar symptoms. He was taken to a hospital in San Francisco where he was found to have Valley Fever. According to a Tutorial for Primary Care Professionals prepared by the Valley Fever Center for Excellence in Tucson, by 1935, this infection was common in the San Joaquin Valley, where it got its namem “Valley Fever.” By the 1940’s Valley Fever, also known as Cocci, Desert Rheumatism, and San Joaquin Fever, was well-known in southern Arizona where it remains a serious threat today.

The California Department of Public Health reports that half of the estimated 150,000 Coccidioides infections that occur each year in the United States do not produce symptoms. The CDPH says that there is currently no vaccine, but efforts to develop a vaccine are ongoing. According to The CDPH, “Those exposed to dust during their jobs or outside activities in these areas should consider respiratory protection, such as a mask, during such activities.”

A Phoenix Business Journal report published October 4, 2011, states “Of the 150,000 new Valley fever infections each year, two-thirds affect Arizonans — the majority of them in Maricopa County…. And the numbers are increasing.”

Visit, vacation in Jacksonville FL, but nix for allergies!

Well, everyone should nix Jacksonville, Florida. Great people, great doctors there, but lousy for allergies and asthma. Even my husband who has never had allergies developed them there. My allergist had traveled with the Navy and said she’d never seen anything like it. But it makes sense if you watch the weather reports closely: the air flow brings in everything from the West AND combines with the winds that curl up from the Gulf of Mexico after passing over the islands, northern South America, and/or the Yucatan peninsula transporting spores and whatever from all those locales. I was on shots, 3 antihistamines/day, steroids, inhalers, and pills to deaden the scratch in my throat. Coughed my way into a hernia and surgery on my vocal cords because of this, too. Visit there, vacation there, but do not move there or drink the water–nasty stuff! – submitted by Kathy, Jacksonville FL


I am going on a trip to Mexico in august and would like to know if i should be concerned with my allergies. I have slight asthma and food allergies. Please let me know. — Delores, United States

[Originally posted to on June 15, 2004]

Mexico, New Mexico, Germany

We moved because of the military from Albuquerque, New Mexico, to Germany. My son had allergy/asthma issues before but nothing like now. He was retested since we have been here and he is allergic to mold which we did not test for in NM. His medication has been doubled since being here and he is now on 5 medicines at the age of 6. The Army is looking into moving us from Germany back to the states to a hotter/drier climate. Germany is very damp, and moldy. But we are yet to find out the best place for my son. What we do know is he was significantly better in NM. — S.K.H., Germany

[Originally posted to on February 11, 2004]

Guadalajara, Mexico; Memphis; Southwest

After suffering from recurrent sinus infections, asthma and allergies, I began to study climate and locations to try to better my situation. I chose Guadalajara, Mexico, after trying some SW locations.

The results have been/are amazing. No allergy, asthma or sinus problems while there over a six year period. Yet, each time that I returned to the US – the Memphis area – I became ill almost immediately, and returned to all of the medications, antibiotics, prednisone, inhaled steroids etc. and suffered until returning to Guadalajara, where I felt better almost immediately, and was fully recovered within a week. Often in a day or so.

The climate in Guadalajara is said to be the “2nd best in the world.” GDL is a mile high and does not have wide ranges or swings of temperature. While there is air pollution, it would appear that the high-dry climate was beneficial to my condition. — M.C.M., Guadalajara, Mexico

[Originally posted to Allergy on May 18, 2003]