Mosquitoes Becoming Immune To DEET, Study Suggests

by Sean McLachlan on


According to a new study, mosquitoes are learning to ignore DEET, the BBC reports.

Researchers at the London School of Hygiene and Tropical Medicine tested the responses to DEET by the Aedes aegypti, a type of mosquito that can carry yellow fever and dengue fever and is thus particularly dangerous to adventure travelers.

In a new study published in the journal PLOS ONE, researchers say that while mosquitoes are at first repelled by DEET’s smell, they soon become accustomed to it and can return bite the wearer. Electrodes attached to the insects’ antennae show that they adjust to the scent of DEET and simply stop smelling it.

This is something I’ve heard campers and hikers comment on for quite some time now. Spending time in mosquito-ridden Missouri, I’ve noticed this trend myself. Missouri has about 55 known types of mosquito, including the Aedes aegypti.

An earlier study has raised questions about DEET being a neurotoxin. It looks like science’s next task is to find a better insect repellent.

I’ve also noticed that mosquito coils, which do not have DEET as an active ingredient, no longer seem to work on Missouri mosquitoes either. I enjoy sitting on the porch swing of my friend’s house reading. It used to be that a burning coil set nearby would keep the bugs away. No more. The last time I tried it the little bastards were attacking me so much I actually put the coil under the porch swing so the smoke rose right onto me. The mosquitoes didn’t seem to care. I soon retreated inside.

[Photo of Aedes aegypti courtesy US Department of Agriculture]

Travel health gift guide: what to get the incessant wanderer on your list

by Laurel Miller on

Travel junkies are a special breed. Only a very distinct personality type gets a rush from being on the road as much as possible, or relishes the discomforts and situations most people go to lengths to avoid. Homesickness is a foreign concept.

I know, because I too suffer from this malady. It started early, because I have a vivid memory of bursting into tears when I was six or seven, after we dropped a friend off at the airport.

“What’s wrong?” my dad asked. “I’m sad because we’re not getting on an airplane,” was my reply (ironic given my aviophobia, which had its onset about 12 years later).

A paralyzing fear of air travel hasn’t stopped me from roaming, however. So, whether you have a loved one who practically lives at Club Med or one actually enjoys sleeping on the ground or in janky Third World hostels rife with cockroaches…lucky you. You have a travel addict in the family or as a friend.

One experience incessant wanderers don’t go looking for? Illness or injury. While not inevitable, the more time you spend abroad, the greater the likelihood of suffering from anything from an infected bug bite or Bali Belly to…worse. But as I’ve always said, you can get hit by a bus crossing the street.

Of course travel isn’t inherently unsafe, but there are precautionary measures that minimize the odds of having health issues on the road. Below, my road-tested gift picks for frequent travelers (especially those who visit sub-tropical or tropical climes) and outdoor enthusiasts.

SteriPEN or LifeStraw portable water filter
Reasons why one of these is a worthwhile investment:

  • Saves money on purchasing bottled water in developing nations/places without potable water
  • Better for the environment (see above)
  • You can contract giardia or other nasties from improperly “bottled” water (trust me)
  • You don’t have to be out in the backcountry to have a potable water shortage; owning a filtration system is good insurance you stay hydrated and healthy, even in the city.

[Photo credit: Flickr user fauxrealphotos]Travel first aid kit
Even infrequent travelers should carry basic first-aid supplies: band-aids, gauze pads, Neosporin, OTC meds, etc.. Personalize your gift by tailoring a pre-purchased kit (REI is a great place to find different types and sizes) to suit the interests and needs of your recipient.

Wilderness first aid class
CPR or a general first aid class is a good idea for anyone, but if any of your loved ones live for backcountry pursuits or traveling off the beaten path, a WFA course can be a lifesaver–literally. Look one up in your area through the American Red Cross.

Controlled-release DEET and/or Insect Shield apparel
There was a time, several years ago, when I shunned DEET unless I was in a malarial region. Why, I asked myself, would I willingly douse myself in a pesticide? Why would I inflict said poison upon the environment?

That philosophy is all well and good until you get bitten by something harboring an infectious evil (in my case, it was sandflies carrying the Bartonella bacilliformis bacterium) that anti-malarials can’t prevent. Also note that malaria prophylaxis is not without considerable side-effects and may not protect you against certain strains of the disease. Be sure to talk to an infectious disease, tropical medicine, or travel physician experienced with actual working experience in these regions.

These days, I’m all about DEET if I’m traveling somewhere with potentially harmful biting insects, especially now that there are controlled-release versions on the market (there are various brands on the market; Sawyer Products is highly recommended). One application is good for up to 12 hours.

As for clothes, I love my Insect Shield long sleeve button-up shirt from ExOfficio. Good for up to 70 washings (after which you still have a good-looking, lightweight travel top), bug-repelling garments are treated with permethrin, EPA-registered, and free of toxic-smelling fumes.

Sun protective clothing
As you likely know, heat exhaustion or heat stroke can be serious; even fatal. In addition to a good sunblock, sunglasses, and a hat, sun protective clothing is a seriously smart idea for outdoor types. Once again, I recommend ExOfficio, or REI own brand, which will save you a few dollars.

Bear bell or spray
Google “2011 grizzly attacks.” ‘Nuff said.

SmartWool socks
What they say in the military is true: you gotta take care of your feet. Once your dogs go, you’re SOL in the backcountry or tropics. Keeping feet clean and dry (and warm, if applicable) is of utmost importance (at the very least, fellow travelers will appreciate your hygiene efforts). These moisture-wicking, stench-resistant socks are invaluable even if you’re just planning an extended trip.

Ibex woolies
Getting chilled can quickly become serious or fatal, and hypothermia prevention in the form of extra layers is key. These 100% merino wool underlayers from Vermont-based outfitter Ibex are the bomb. Comfortable, warm, moisture-wicking, and seriously odor-proof (anything that remains fit to wear in public after a month-long backpacking trip from the Andes to the Amazon–sans laundry–is a product I heartily endorse). Plus, they come in cute stripey designs as well as solids.

[Photo credit: Band-aids, Flickr user m.gifford, feet, Flickr user Cin]

Mosquito Repelling Gear: It Works

by Pam Mandel on
The last thing you want to bring home from your safari? Malaria. And if you’re a bug attractor like me, it’s not just the anti-malarials you’ll want to pack. You’ll also want a good sized helping of DEET infused goo. And some stuff made from fabrics that have mozzie repelling properties.

Once you’ve caved in to the fact that you’re going to be a khaki covered dork, your life will get a lot easier. Start with the BugsAway shirt from ExOfficio. In addition to UV protection, it’s made with Insect Shield, a fabric infused with permethrin, a bug repellent, that holds through 70 washings.

I liked this shirt a lot. I liked the side vents that let air in along the back, I liked the securely zippered pockets, I liked the cut. It comes in a couple of colors, not just khaki. It’s wrinkle resistant, so I could stuff it in my day pack and just shake it back out into shape. I wore my BugsAway shirt almost every evening in camp and in the buggier beach towns. The result? None of those nasty through the shirt mozzie bites. This is a great travel shirt, a fine addition to a tropical travel wardrobe. The shirt is 88.00 from ExOfficio — you might want to check out their complete BugsAway line.

I also wore an Cocoon Insect Shield sarong on a number of occasions. I wore it to the beach, I while hanging out on tour bus, in the tropics I used it as an extra layer over the paper thin sheets provided at my hotels. I wore it as a scarf on the safari rig and used it as a beach towel. Mine was a preview model — they’re not yet out on the US market, but keep an eye on the Cocoon site if you want one.

I always pack a wrap of some kind, it’s the most versatile and useful item. The bug proof features of this one meant that the I had a skirt/scarf/wrap that also kept the biters at bay. I got a minimal number of bites during my travels to mosquito choked places, and none of them were on the areas covered by the sarong or my bug proof shirt.

The rest of my clothing I sprayed down with Ultrathon insect repellent. Good for six weeks or six washings, it worked well and didn’t leave any detectable chemical smell in my clothing. I far preferred the treated clothing options to slathering myself with bug repellent; that stuff smells, gets sticky, and I was relieved to have to use it just on my exposed extremities.In addition to packing mosquito-proofed clothing, I included a sleeping bag liner/sleep sheet. Mine was cotton and also came from Cocoon. I was pleased that I’d decided to bring it along. Not only did it keep me from using the perfectly disgusting hotel sheets in Nairobi, it also provided just the right weight of coverage for those hot nights in camp. The liners are 36.00 and come in three colors.

The mosquitoes liked my sleep sheet no more than they liked my bug proof clothing, which is to say not at all. During my two week trip, I received the most bites the night I went tromping through the grass in the darkness without applying repellent to my sock-less feet and ankles. It was my own fault.

“Don’t get bit,” is one of the primary pieces of advice the doctor at my local travel clinic pushes on travelers bound to areas with mosquito or other bug-borne illnesses. It costs a little bit more to add bug repelling attire to your travel kit, but it’s worth it. This stuff works.

Top five things to look for in a travel doctor, and why you should have one

by Laurel Miller on

Despite writing about food and adventure travel for a living, I used to be somewhat blasé about the concept of travel medicine. Multiple incidents of Giardia/dysentery/traveler’s diarrhea/full-body outbreaks of mosquito and sand fly bites just taught me to carry a serious stash of antibiotics in my first-aid kit. At least I’ve always been conscientious about travel immunizations and educating myself about the primary diseases indigenous to my destination.

When you’re young and healthy, it seems silly to have a travel medicine specialist. Although this article is primarily directed at adventure travelers, odds are, the worst thing you’ll come home with is a backpack full of crappy souvenirs. But no one’s invincible, and should you require a specialist for something not responding to conventional treatment or with progressive symptoms, time is of the essence. Many “exotic” diseases progress rapidly, and can cause irreversible damage or death if not properly diagnosed and treated. Even with incurable diseases, the earlier you catch them, the easier it will be to manage symptoms and prevent them for worsening.

No, I’m not a doctor, although I come from a medical family. But I got seriously schooled after visiting Ecuador two years ago. After a fantastic month of adventure activities in remote parts of the Andes and Amazon Basin, I fell seriously ill the last day my trip. Two years of at-times crippling symptoms, 10 CT scans, five medical facilities, dozens of specialists, four surgical procedures, two surgeries, one cancer diagnosis, and near-medical bankruptcy later, I’ve become an expert at being my own advocate.

My infectious disease doctor believes that I contracted a form of bartonellosis called Oroya Fever after being bitten by sand flies. The good news: My health is currently stable, but we don’t know if the disease is in remission or not. But I have permanent cognitive damage, scarring or tumors on most of my internal organs, and intermittent arthritis. But believe me, I feel lucky.

I don’t want anyone to go through the health and medical nightmare I’ve endured, so I’ve compiled a list of essentials in a travel medicine doctor. Ergo, number one with a bullet:

1. Is he/she a travel or tropical medicine specialist?
Pre-bartonella, I used an internist as my GP/prescriber of antibiotics. If you can find an internist, gastroenterologist, or infectious disease doctor who is also a specialist in travel medicine, that’s a huge plus. 2. Does he/she have personal experience traveling or practicing in developing nations?
There are a lot of practicioners who aren’t globally aware, so to speak. You can’t diagnose what you don’t understand, know about, or have first-hand experience with. Period.

3. Is he/she a good listener and empathetic?
It’s difficult to find these qualities in any doctor, especially in today’s medical climate. But it’s imperative to find someone you can communicate with, and who understands what you’re going through if you’re suffering from a mystery travel ailment. Don’t settle, even if you need to travel to another state or country to seek treatment (what stumps doctors here is often commonplace in the country of origin).

4. Does he/she have a good network of colleagues in multiple specialties (including travel/tropical medicine) to consult for additional opinions?
My current mantra is to seek a third opinion, from at least two different medical facilities. That, and to have a travel physician who actively consults colleagues and does additional research to assist with a diagnosis and/or treatment. My infectious disease doctor talked to specialists at a medical school in Peru on my behalf, and even tracked down a relevant medical paper from 1897 as he honed in on a diagnosis. And while I wouldn’t consider it a deal-breaker if the answer is no, see if your doctor is an active and participating member of the International Society of Travel Medicine.

5. Does he/she return your calls/provide you with email, pager, or office number so you can get in touch directly?
I’ve learned that a good doctor who is invested in your recovery will provide an open line of contact to address questions, concerns, and exchange pertinent information. Tip: Please don’t abuse this privilege. Physicians work insanely long hours, under constant stress. And don’t expect to hear back immediately if you leave a non-urgent message; be realistic. A couple of days, fine (many specialists aren’t in clinic every day). A week? Make a polite follow-up.

Whether or not you end up getting a travel doctor, the International Association for Medical Assistance to Travelers (IAMAT) provides loads of useful information, including a directory of global travel medicine clinics with English-speaking staff, and a destination-specific travel health planner. And depending upon what you plan to do on your trip, where you’re traveling, and your financial situation, you may want to invest in travel insurance.

[Photo credits: blood transfusion, Flickr user CarynNL;patient, Flickr user kk+; legs, Laurel Miller]

Gadling’s 2011 New Year’s travel resolutions

by Laurel Miller on

It’s that time of year again. A time when we all make certain promises to ourselves, in an attempt to make our lives more organized, our bodies stronger or leaner. We vow to spend more time with loved ones, give back to others, or ditch that cubicle job. And some of us…well, we just want to keep on traveling, any way we can manage to finagle it.

In the spirit of New Year’s, I asked my fellow Gadling contributors about their travel resolutions for the coming year, and came up with some of my own. Our goals are all over the map (no pun intended), but a common theme emerged. Despite our love of exotic adventures, most of us want to spend more time exploring in our own backyard (that would be the United States). That, and invent musical underwear.

Leigh Caldwell

  • Go on my first cruise.
  • Spend a weekend somewhere without Internet access, and, if I survive that…
  • Celebrate the Fourth of July with my family in Banner Elk, North Carolina, home of the quintessential small-town Independence Day. There’s a three-legged race, a rubber ducky race down a mountain stream, and a parade filled with crepe paper, balloons, and every kid and dog in town.

McLean Robbins

  • Quit my “day job” so I can do this full-time.

[Photo credit: Flickr user nlmAdestiny]Laurel Miller

  • Get back in shape after a two-year battle with Oroya Fever (contracted in Ecuador), and climb a volcano in Bolivia.
  • Finally start exploring my adopted state of Washington, especially the Olympic Peninsula.
  • Visit India for the first time; see if it’s possible to subsist on street food without getting dysentery.
  • Learn to wear DEET at all times when traveling in countries that harbor nearly-impossible-to-diagnose diseases like Oroya Fever.

Sean MacLachlan

  • Get back to Ethiopia.
  • Explore Green Spain (the north part of the country).
  • Show my son a non-Western culture.
  • Invent an underwear stereo that plays cheap jazz music when subjected to a TSA patdown.


Mike Barish

  • Drive cross country.
  • See the Grand Canyon (finally).
  • Finally learn how not to overpack.
  • And, for the fifth year in a row, I resolve to learn how to play the keytar (2011 has got to be the year!).

Darren Murph

  • Bound and determined to visit my 50th state, Alaska.
  • Dead-set on relocating a childhood friend of mine back to North Carolina, and then taking him on a road trip of some sort.

Meg Nesterov

  • Visit more places where I know people.
  • Be in more travel pictures and get my husband out from behind the
  • camera occasionally.
  • Take at least one guidebook-free and paperless trip. Okay, maybe one map.
  • Take better notes. I might think I’ll always remember the name of that fun-looking restaurant or weird sign I want to translate, but it’s easy to forget when you’re taking in so many new things.
  • See more of Turkey while I still live here. I spend so much time traveling to nearby countries, I have to be sure to see the landscape of Cappadocia and eat the food in Gaziantep before I go back to the U.S..

Grant Martin, Editor-in-Chief

  • Travel a bit less and work a bit more [Sure, Grant!].

Annie Scott Riley

  • Travel less alone, and more with my husband.

Alex Robertson Textor

  • More open-jaw travel, flying into one destination and traveling by land to another before returning home. It’s my favorite way to see a new or familiar territory–gradually and without any backtracking. I need to do it more often.
  • More thematic consistency in my travels. Instead of scrambling to meet whatever assignment comes my way, I want my travels in the next year to be focused on a region or two, and on a number of overarching questions or issues. I’m still collecting ideas: Remote European mountain villages? Neglected second-tier cities? The Caucasus?
  • Northern Cyprus. Have been wanting to visit since I was a kid. 2011’s the year.

David Farley

  • To take back the name “Globetrotters” from the Harlem basketball team.
  • To introduce eggnog and lutefisk to southeast Asia.
  • To eat fewer vegetables.

[Photo credits: volcano, Laurel Miller; Grand Canyon, Flickr user Joe Y Jiang; Cappadocia, Flickr user Curious Expeditions; lutefisk, Flickr user Divine Harvester]