Asgar Ali, Sujitha Kathirvel, Devika T, Sivasankaran M P, Balan K, Praveen Kumar G S, Saleem M, Joseph P Innocent, Vijayalakshmi T S

A study on Paederus dermatitis outbreak in a suburban teaching research hospital, Kanchipuram, India

Paederus dermatitis, a kind of irritant contact dermatitis by Staphylinid beetle, is more prevalent in Asia-Pacific countries with the attributes of tropical climate. Brushing, pressing, or crushing of the beetle against the skin releases the pederin toxin (pederin) that can produce urticarial, vesicular, and bullous lesions. We conducted a 1-year retrospective study of 84 patients with Paederus dermatitis attending our hospital to study the clinical patterns of dermatitis and epidemiological prevalence. It mostly affects the hostel students residing within the campus near the paddy fields. Itching was most common symptom, involving mainly the neck and arms. Linear erythematous lesions were the common sign involving the extremities (40.1%), neck (36.4%) and trunk (32.1%). Vesicles and pustule formation was seen in (51.19%) of the patients, respectively. The most striking feature of Paederus dermatitis, the Kissing lesions were seen in (2.4%) of the patients. Periorbital involvement was seen in (17.4%) of the cases. Paederus beetles were frequently seen in the campus attracted by incandescent and fluorescent lights. Simple preventive measures such as use of insecticide like pyrethroid, clearing of excess vegetation would check the Paederus infection. Clinical education and awareness regarding this condition will prevent misdiagnosis.

Keywords:

Paederus dermatitis, linear dermatitis, retrospective study,

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Morsy TA, Arafa MA, Younis TA, Mahmoud IA. Studies on paederus alfierii koch (Coleoptera: Staphylinidae) with special reference to the medical importance. J Egypt Soc Parasitol. 1996;26:337-51.
Zargari O, Asadi AK, Fathalikhani F, Panahi M. Paederus dermatitis in northern Iran: A report of 156 cases. Int J Dermatol. 2003;42:608-12.
Singh G, Yousuf Ali S. Paederus dermatitis. Indian J Dermatol Venereol Leprol. 2007;73:13-5.
Smith HR, Basketter DA, McFadder JP. Irritant dermatitis, irritancy and its role in allergic contact dermatitis. Clin Exp Dermatol. 2002;27(2):138-46.
Frank JH, Kanamitsu K. Paederus, sensu lato (Coleoptera: Staphylinidae): Natural history and medical importance. J Med Entomol. 1987;24:155-91.
Handa F, Pradeep S, Sudarshan G. Beetle dermatitis in Punjab. Indian J Dermatol Venerol Leprol. 1985;51:208-12.
Sujit SR, Koushik L. Blister beetle dermatitis in West Bengal. Indian J Dermatol Venereol Leprol. 1997;63:69-70.
Kamaladasa SD, Pereea WDH, Weeratunge L. An outbreak of Paederus dermatitis in a suburban hospital in Srilanka. Int J Dermatol. 1997; 36:34-6.
Mokhtar N, Singh R, Ghazali W. Paederus dermatitis among medical students in USM, Kelatan. Med J Malaysia. 1993;48:403-6.
George AO, Hart PD. Outbreak of Paederus dermatitis in southern Nigeria: Epidemiology and dermatology. Int J Dermatol.1990;29:500-1.
Qadir SNR, Raza N, Rahman SB. Paederus dermatitis In Sierra Leone. Dermatology Online Journal. 2006; 12(7):9.
Morsy TA, Arafa MA, Younis TA, Mahmoud IA. Studies on Paederus alfierii Koch (Coleoptera: Staphylinidae) with special reference to the medical importance. J Egypt Soc Parasitol. 1996;26:337-51.
Sendur N, Savk E, Karaman G. Paederus dermatitis: a report of 46 cases in Aydin, Turkey. Dermatology. 1999;199:353-5.
Diogenes MJ. [Contact dermatitis by pederine: clinical and epidemiological study in Ceara State, Brazil. Rev Inst Med Trop Sao Paulo 1994; 36:59–65. Portuguese. Banney LA, Wood DJ, Francis GD. Whiplash rove beetle dermatitis in Central Queensland. Australas J Dermatol 2000; 41:162-7.
Lt Col Verma R, Maj Agarwal S. Blistering Beetle Dermatitis: An Outbreak. MJAFI 2006;62:42–44.
Gnanaraj P, Venugopal V, Kuzhal Mozhi M, Pandurangan CN. An outbreak of Paederus dermatitis in a suburban hospital in South India: A report of 123 cases and review of literature. J Am Acad Dermatol. 2007;57:297-300.