BLISTER BEETLE DERMATITIS PDF

See more images of lax beetles. Where are lax beetles found? In New Zealand, most lax beetles are native with several adventive species, meaning they could have been introduced from other countries by humans [3]. Beetles and young grubs are found on driftwood or rotting wood just above high tide in coastal areas and on vegetation inland. Adults are found under the bark of dead tree trunks and on tree branches. They feed on pollen and nectar from flowers or vegetation.

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See more images of lax beetles. Where are lax beetles found? In New Zealand, most lax beetles are native with several adventive species, meaning they could have been introduced from other countries by humans [3].

Beetles and young grubs are found on driftwood or rotting wood just above high tide in coastal areas and on vegetation inland. Adults are found under the bark of dead tree trunks and on tree branches. They feed on pollen and nectar from flowers or vegetation. On summer nights, adult beetles are attracted by and fly to bright artificial white lights [1—3]. Who gets blisters from the lax beetle? Anyone can get blisters if the beetle is crushed, brushed or pressed against the skin when gardening or during outdoor activities.

Lax beetle blisters Day 1: beetle blisters drying up What causes lax beetle dermatosis? Crushing the beetle on the skin, or pressing or accidentally brushing against the skin, causes the beetle to release a fluid called haemolymph from its leg joints. The fluid contains cantharidin or cantharid, which is intended to deter predators from eating the beetle eggs and is irritating to human skin [1,3,7].

The male beetle passes the blistering fluid to the female beetle during mating [5]. The beetles do not bite or sting [8]. What are the clinical features of lax beetle dermatosis? Blister beetle dermatosis is characterised by superficial blisters. The face, neck, and chest are commonly affected. Tense blisters filled with clear fluid develop 24—48 hours after contact with the blister beetle haemolymph.

Single or multiple vesicles, bullae, or multiple blisters appear in a line or track where the beetle has been in contact with the skin. There may be mild itching and minimal surrounding erythema, but the blisters are not painful. What are the complications of lax beetle dermatosis?

There are no complications from blister beetle dermatosis, which heals within a few days without scarring [6,9]. How is lax beetle dermatosis diagnosed? Lax beetle dermatosis is diagnosed from the clinical appearance and history of contact, or likely contact with a lax beetle. Swabs may be taken to exclude bullous impetigo , herpes simplex , or herpes zoster. In recurrent cases, patch testing might be performed to exclude a contact allergy.

What is the differential diagnosis for blister beetle dermatosis? Other blistering conditions that may need to be considered include:.

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Blister Beetle Bites

Takeaway Blister beetles are long, narrow plant-feeding insects Meloida that vary in color from yellow to gray. They live in flower beds and grassy fields, and congregate around outdoor lights in the evenings. That is, until you develop a blister or welt that matches the description of blister beetle dermatitis. Read on to see pictures and learn more about these beetles, including how you get blister beetle dermatitis, how to treat it, and how to protect yourself. Do blister beetles bite or sting?

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Blister beetle dermatitis

I understand my consent is not required to make a purchase. Their appearance varies, but most are about 1 to 2. Some are brightly colored with yellow or orange, while others are a dull gray. They often are encountered at exterior lights in the evening or on flowers in grassy fields. Blister beetles use a potent chemical defense to protect themselves from being eaten by predators. Even though humans are not predators of blister beetles, they also may be affected if they encounter these insects. Blister beetles internally produce a chemical named cantharidin.

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