Perianal abscess due to Enterobius vermicularis. Report of a case

Enterobius vermicularis and perianal sepsis in children

Specific aetiological factors are responsible for a significant proportion of cases of perianal sepsis in children. A rarely implicated pathogen is Enterobius vermicularis, an obligate parasite with a ubiquitous presence in children. The authors describe two unequivocal instances of threadworm involvement in perianal sepsis, suggesting a pathophysiological basis.

Perianal abscess due to Neisseria gonorrhoeae: an unusual case in the post-antibiotic era

Described here is the case of a 21-year-old homosexual male patient who presented with perianal abscess without urethritis that was caused by infection with Neisseria gonorrhoeae. Incision and drainage of the abscess and oral penicillin therapy resulted in full healing, without the development of an anal fistula. The spectrum of gonococcal abscesses and the relevant aspects of their management are discussed.

Perineal nodule due to enterobiasis: an aspiration cytologic diagnosis

Subcutaneous swelling due to Enterobious vermicularis infection is rare. Their presence in perineal subcutaneous tissue is unusual and a clinical curiosity. A case of subcutaneous nodule in the perineum due to E. vermicularis infection diagnosed on fine-needle aspiration is described. Tissue reaction was granulomatous with neutrophils and eosinophils. Lack of familiarity with the morphology of parasites or its eggs, degeneration, and inadequate sampling may make the diagnosis difficult. This case report provides the morphologic clues to cytopathologists toward rendering a diagnosis and alerts them to the possibility of parasitic infection in unusual locations.

Chemotherapy of enterobiasis (oxyuriasis)

Enterobius vermicularis (syn. Oxyurus vermicularis), also known as pinworm or seatworm, is the causative agent of human enterobiasis (oxyuriasis). The disease is more prevalent in temperate regions and is facilitated by factors such as overcrowding in schools and family groupings, as well as inadequate personal and community hygiene. Although the infection is more likely to occur in lower socioeconomic groups, enterobiasis has been reported to affect virtually every level of the general population and especially children. In the great majority of cases, enterobiasis is asymptomatic. One common symptom is intense pruritus ani that in some patients can lead to insomnia, restlessness and irritability. Scratching may cause skin irritation, and in more serious cases, eczematous dermatitis, haemorrhage or secondary bacterial infections. Ectopic migration of E. vermicularis often results in pinworm infestation of the female genital tract often causing granulomas of the uterus, ovary and the fallopian tubes and pelvic peritoneum. Anthelmintic therapies for enterobiasis are successful and include mebendazole, albendazole and pyrantel pamoate. Mass medication of affected groups reduced symptoms rapidly, progressively and in a cost-effective way.

Perianal granuloma caused by Enterobius vermicularis: report of a new observation and review of the literature

The literature reports 12 cases of enterobiasis presenting as perianal abscess or granuloma. We describe an additional case of a perianal granuloma containing Enterobius vermicularis eggs in a 5-year-old boy. We suggest routine parasite screening for all children presenting with this condition.