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Staying healthy on a trip to Costa Rica is predominantly a matter of being a little cautious about what you eat and drink, and using common sense. Know your physical limits, and don't overexert yourself in the ocean, on hikes, or in athletic activities. Respect the tropical sun and protect yourself from it. As you climb above 10,000 ft (3000m), you may feel the effects of altitude sickness. Be sure to drink plenty of water and not overexert yourself. Limit your exposure to the sun, especially during the first few days of your trip and, thereafter, from 11am to 2pm. Use sunscreen with a high protection factor, and apply it liberally. Remember that children need more protection than adults. I recommend buying and drinking bottled water or soft drinks, but the water in San José and in most of the country's heavily visited spots is safe to drink.

General Availability of Health Care

In general, Costa Rica has a high level of medical care and services for a developing nation. The better private hospitals and doctors in San José are very good. In fact, given the relatively budget nature of care and treatment, a sizable number of Americans come to Costa Rica each year for elective surgery and other care.

Pharmacies are widely available, and generally well stocked. In most cases you will not need a doctor's script to fill or refill a prescription.

If You Get Sick

Your hotel front desk should be your best source of information and assistance if you get sick while in Costa Rica. In addition, your local consulate in Costa Rica can provide a list of area doctors who speak English. The local English-language newspaper, the Tico Times, is another good resource. Hospitals in San José have the most modern facilities in the country. Most state-run hospitals and walk-in clinics around the country have emergency rooms that can treat most conditions, although I highly recommend the private hospitals in San José if your condition is not life-threatening and can wait for treatment until you reach one of them.

Regional Health Concerns

Tropical Illnesses -- Your chance of contracting any serious tropical disease in Costa Rica is slim, especially if you stick to the beaches or traditional spots for visitors. However, malaria, dengue fever, and leptospirosis all exist in Costa Rica, so it's a good idea to know what they are.

Malaria is found in the lowlands on both coasts and in the northern zone. Although it's rarely found in urban areas, it's still a problem in remote wooded regions and along the Caribbean coast. Malaria prophylaxes are available, but several have side effects, and others are of questionable effectiveness. Consult your doctor regarding what is currently considered the best preventive treatment for malaria. Be sure to ask whether a recommended drug will cause you to be hypersensitive to the sun; it would be a shame to come down here for the beaches and then have to hide under an umbrella the whole time. Because malaria-carrying mosquitoes usually come out at night, you should do as much as possible to avoid being bitten after dark. If you are in a malaria-prone area, wear long pants and long sleeves, use insect repellent, and either sleep under a mosquito net or burn mosquito coils (similar to incense, but with a pesticide).

Of greater concern is dengue fever, which has had periodic outbreaks in Latin America since the mid-1990s. Dengue fever is similar to malaria and is spread by an aggressive daytime mosquito. This mosquito seems to be most common in lowland urban areas, and Puntarenas, Liberia, and Limón have been the worst-hit cities in Costa Rica. Dengue is also known as "bone-break fever" because it is usually accompanied by severe body aches. The first infection with dengue fever will make you very sick but should cause no serious damage. However, a second infection with a different strain of the dengue virus can lead to internal hemorrhaging and could be life threatening.

Many people are convinced that taking B-complex vitamins daily will help prevent mosquitoes from biting you. I don't think the American Medical Association has endorsed this idea yet, but I've run across it in enough places to think that there might be something to it.

One final tropical fever that I think you should know about (because I got it myself) is leptospirosis. There are more than 200 strains of leptospires, which are animal-borne bacteria transmitted to humans via contact with drinking, swimming, or bathing water. This bacterial infection is easily treated with antibiotics; however, it can quickly cause very high fever and chills, and should be treated promptly.

If you develop a high fever accompanied by severe body aches, nausea, diarrhea, or vomiting during or shortly after a visit to Costa Rica, consult a physician as soon as possible.

Costa Rica has historically had very few outbreaks of cholera. This is largely due to an extensive public-awareness campaign that has promoted good hygiene and increased sanitation. Your chances of contracting cholera while you're here are very slight.

Dietary Red Flags -- Even though the water in San José and most popular destinations in Costa Rica is generally safe, and even if you're careful to buy bottled water, order frescos en leche (fruit shakes made with milk rather than water), and drink your soft drink without ice cubes, you still might encounter some intestinal difficulties. Most of this is just due to tender stomachs coming into contact with slightly more aggressive Latin American intestinal flora. In extreme cases of diarrhea or intestinal discomfort, it's worth taking a stool sample to a lab for analysis. The results will usually pinpoint the amoebic or parasitic culprit, which can then be readily treated with available over-the-counter medicines.

Except in the most established and hygienic of restaurants, it's also advisable to avoid ceviche, a raw seafood salad, especially if it has any shellfish in it. It could be home to any number of bacterial critters.

Bugs, Bites & Other Wildlife Concerns -- Although Costa Rica has Africanized bees (the notorious "killer bees" of fact and fable) and several species of venomous snakes, your chances of being bitten are minimal, especially if you refrain from sticking your hands into hives or under rocks in the forest. If you know that you're allergic to bee stings, consult your doctor before traveling.

At the beaches, you'll probably be bitten by pirujas (sand fleas). These nearly invisible insects leave an irritating welt. Try not to scratch because this can lead to open sores and infections. Pirujas are most active at sunrise and sunset, so you might want to cover up or avoid the beaches at these times.

Snake sightings, much less snakebites, are very rare. Moreover, the majority of snakes in Costa Rica are nonpoisonous. If you do encounter a snake, stay calm, don't make any sudden movements, and do not try to handle it. As recommended above, avoid sticking your hands under rocks, branches, and fallen trees.

Scorpions, black widow spiders, tarantulas, bullet ants, and biting insects of many types can all be found in Costa Rica. In general, they are not nearly the danger or nuisance most visitors fear. Watch where you stick your hands; in addition, you might want to shake out your clothes and shoes before putting them on to avoid any unpleasant and painful surprises.

Tropical Sun -- Limit your exposure to the sun, especially during the first few days of your trip and, thereafter, from 11am to 2pm. Use a sunscreen with a high protection factor, and apply it liberally. Remember that children need more protection than adults.

Riptides -- Many of Costa Rica's beaches have riptides: strong currents that can drag swimmers out to sea. A riptide occurs when water that has been dumped on the shore by strong waves forms a channel back out to open water. These channels have strong currents. If you get caught in a riptide, you can't escape the current by swimming toward shore; it's like trying to swim upstream in a river. To break free of the current, swim parallel to shore and use the energy of the waves to help you get back to the beach.

Safety

Although most of Costa Rica is safe, petty crime and robberies committed against tourists are endemic. San José, in particular, is known for its pickpockets, so never carry a wallet in your back pocket. A woman should keep a tight grip on her purse (keep it tucked under your arm). Thieves also target gold chains, cameras and video cameras, prominent jewelry, and nice sunglasses. Be sure not to leave valuables unsecured in your hotel room, or unattended on the beach. Given the high rate of stolen passports in Costa Rica, mostly as collateral damage in a typical pickpocketing or room robbery, it is recommended that, whenever possible, you leave your passport in a hotel safe, and travel with a photocopy of the pertinent pages. Don't park a car on the street in Costa Rica, especially in San José; plenty of public parking lots are around the city.

Rental cars generally stick out and are easily spotted by thieves. Don't leave anything of value in a car parked on the street, not even for a moment. Be wary of solicitous strangers who stop to help you change a tire or take you to a service station. Although most are truly good Samaritans, there have been reports of thieves preying on roadside breakdowns.

Inter-city buses are also frequent targets of stealthy thieves. Try not to check your bags into the hold of a bus, if they will fit in the rack above your seat. If this can't be avoided, keep your eye on what leaves the hold. If you put your bags in an overhead rack, be sure you can see the bags at all times. Try not to fall asleep.

Single women should use common sense and take precaution, especially after dark. I don't recommend that single women walk alone anywhere at night, especially on seemingly deserted beaches, or dark uncrowded streets.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.