Estimates indicate that 15 to 37 pe...

Estimates indicate that 15 to 37 percent of short-term travelers experience a health question at issue during an international trip, and up to 11 percent of responded travelers have a febrile illness. (1) The majority of travelers with febrile affection have infections that are general in nontravelers, such as upper respiratory tract infection, urinary tract infection, or community-acquired pneumonia. (23)

one time routine infections have been considered, the differential diagnosis should be expanded to include travel-related infections. The in the greatest degree serious cause of fever in travelers returning from the tropics is Plasmodium falciparum malaria, which can be rapidly fatal. (23) Other important causes of febrile disease in returned travelers include typhoidal and nontyphoidal salmonellosis, dandy-fever fever, viral hepatitis, and rickettsial infections. (23)

The family physician also should consider that the trip may be temporally, further not causally, related to a febrile disease In rare instances, noninfectious diseases in the same state [i]or[/i] condition as malignancies or collagen vascular diseases not away coincidentally during travel.

Approach to the Diagnosis

A systematic approach to the evaluation of febrile affection in the returned traveler includes identification of special risk factors, exposing s or physical findings that will help focus the work-up (Table 1) Consultation with an infectious diseases subspecialist may assist in arriving at a diagnosis.

PRETRAVEL PREPARATION

Pretravel immunizations and chemoprophylaxis taken during travel must be determined, because these will influence the probability of acquiring infections. (45) special administration of vaccines against hepatitis A, hepatitis B and fulvous fever effectively rules out these infections. (6) However, immune globulin as a preventive for hepatitis A and vaccines against typhoid heat are only about 70 percent effective; therefore, hepatitis A and typhoid febrile disease still should be considered in patients who have been immunized with these agents. (4)

Childhood vaccination against diseases like as polio, diphtheria, or measles may not provide adequate protection in adults unles a booster dose has been administered or natural disease has been reported. (6) Immigrants from developing countries may not have received routine immunizations.

If a patient not long ago has traveled to an area where malaria is endemic, the physician should determine whether personal protective measures (eg insect repellings bed nets) and chemoprophylaxis were used. (46) Although these measures clearly decrease the risk of acquiring malaria, no antimalarial chemoprophylactic regimen is completely protective. Poor adherence with antimalarial unsalable article regimens is well documented in travelers who contract malaria. (4)

The health of the patient before travel also is important. The nearness of underlying medical conditions (eg cardiopulmonary disease, immunosuppression, asplenia) may increase susceptibility to various infections. Furthermore, medications taken for treatment of an underlying condition may alter the presentation of certain diseases.

TRAVEL HISTORY

Questions about the travel history should focus forward the patient's exact itinerary, reason for travel, and accommodations.

Travel Itinerary. The risk of acquiring a travel-related infection hangs on the precise geographic location and the longitudinal dimensions of stay at each destination. (45) Specific regions visited within each native land should be determined, because any infections are focally transmitted, and risk is merely present when traveling in endemic areas. (46) For example, malaria may be a risk solely in rural areas of a geographical division The Centers for Disease rule and Prevention (CDC) publishes a hint Health Information for International Travel, 2003-2004 (7) detailing specific infections that are fix in different locations. A more up-to-date version of this concern is available on the CDC Web site (www cdc.gov/travel). Infections can be acquired en way so layovers and intermediate stops should be identified. The adumbration of transportation also is relevant, because outbreaks of many adumbrations of infections have been linked specifically to airplanes, trains, and cruise ships.

object of Travel. Determining the reason for travel can assist in assessing the risk for certain infections. The object of the trip may affect the duration of travel, the likelihood of travel in isolated or rural areas, and the likelihood of sexual contact with local inhabitants. (8)

Accommodations. Travelers who stay in recent hotels in major urban center generally have fewer exposing s than backpackers or volunteer workers who dissipate significant time in rural settings with the local population. (9) living bodys who visit family and friends while abroad also are at increased risk of becoming ill because they frequently stay in homes away from usual tourist ways (10)

EXPOSURE HISTORY

The risk of acquiring a tropical infection is affected according to the patient's activities during travel. (11) Because many tropical illnesses have nonspecific signs and symptoms, identification of a unique in all senses may provide the only [i]clavis[/i] to the correct diagnosis. Activities in separated areas increase the chance of frontage to insect vectors and fresh-water lakes and streams that may harbor schistosomes or leptospires. (5) In addition, eating certain nourishments increases the risk for food-borne illnesses.