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Bedbugs: Helping your patient through an infestation

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TREATMENT AND ERADICATION

Treatment is mainly symptomatic—systemic antihistamines and topical corticosteroids to reduce pruritus and alleviate the dermatitis.2 Patients should be instructed to avoid scratching to prevent infection. Secondary bacterial infection can be treated with topical or systemic antibiotics. Rare cases of bite-induced asthma or anaphylaxis necessitate appropriate emergency treatment. Extermination of infestation is critical to therapy.

If bedbug infestation is suggested, mattresses, bedding, sleeping areas, and bed clothing should be inspected for insects, eggs, and fecal spotting. Adhesives or traps that emit heat or carbon dioxide can be used to capture the bedbugs. During widespread infestation, the arthropods release a pungent odor, which allows trained dogs to detect them with 95% to 98% accuracy.19

Eradication techniques

Once infestation is confirmed, patients should contact an exterminator who can confirm the presence of bedbugs. Typical eradication measures often require nonchemical control and chemical pesticides.

Professional exterminators have special equipment that can heat a room to 48 to 50°C (118–122°F). Heat sustained at this temperature for 90 minutes is sufficient to kill bedbugs.20

The infested area should be vacuumed daily, and vacuum bags and unwanted items should be sealed in plastic before discarding. Clothing, linens, and infested fabrics should be washed and dried in heat at 60°C (140°F) or greater.

Mattresses and furniture should be sealed in a special plastic that allows treatment with heat, steaming, or pesticides. Most professional pesticides contain pyrethroids, but resistance to these products is common, necessitating the use of multiple formulations to overcome resistance.8

Over-the-counter pesticides, almost exclusively pyrethroids, are variably effective and potentially hazardous to consumers.8 Patients must be advised to follow label directions to avoid adverse effects and toxicity.

Alternative chemical eradication methods to circumvent the problem of resistance include piperonyl butoxide, S-methoprene, boric acid, silicates (diatomaceous earth dust), and sulfuryl fluoride. Recent research has also posited the use of antiparasitic agents such as ivermectin and moxidectin in cases of resistant bedbug infestation, with promising results.21

All extermination products and techniques have variable risks, efficacies, and costs,8 and repeat inspections and retreatment are often required.

Prevention strategies include visual inspection of possibly infested rooms, with particular attention to mattress seams and crevices, placing luggage on a luggage rack away from the floor and bed, and careful examination of acquired second-hand items.7

Educating patients is the key to success

While all of the above eradication techniques are important curative strategies, the success of any treatment is contingent on appropriate patient education about the nature of the problem.

Resolving a bedbug infestation is notoriously difficult and requires meticulous adherence to hygiene and cleansing instructions throughout the household or institution for a sustained period of time. Information from sources such as the US Environmental Protection Agency (www.epa.gov) can empower patients to perform the necessary eradication protocols, and clinicians should routinely recommended them as part of a holistic treatment strategy.

Next Article:

Bedbugs: Awareness is key

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