First Report of Myiasis Caused by Cochliomyia hominivorax (Diptera: Calliphoridae) in a Diabetic Foot Ulcer Patient in Argentina

Abstract

Myiasis is usually caused by flies of the Calliphoridae family, and Cochliomyia hominivorax is the etiological agent most frequently found in myiasis. The first case of myiasis in a diabetic foot of a 54-year-old male patient in Argentina is reported. The patient attended the hospital of the capital city of Tucumán Province for a consultation concerning an ulcer in his right foot, where the larval specimens were found. The identification of the immature larvae was based on their morphological characters, such as the cylindrical, segmented, white yellow-coloured body and tracheas with strong pigmentation. The larvae were removed, and the patient was treated with antibiotics. The larvae were reared until the adults were obtained. The adults were identified by the setose basal vein in the upper surface of the wing, denuded lower surface of the wing, short and reduced palps, and parafrontalia with black hairs outside the front row of setae. The main factor that favoured the development of myiasis is due to diabetes, which caused a loss of sensibility in the limb that resulted in late consultation. Moreover, the poor personal hygiene attracted the flies, and the foul-smelling discharge from the wound favoured the female's oviposition. There is a need to implement a program for prevention of myiasis, in which the population is made aware not only of the importance of good personal hygiene and home sanitation but also of the degree of implication of flies in the occurrence and development of this disease.

Estudo Retrospectivo De Miíases Em Cães Atendidos No Hospital Veterinário Da Universidade Federal Do Piauí

“…Essa alta prevalência pode estar relacionada ao descaso dos tutores frente a presença de ferimentos em seus animais e ausência de tratamento em tempo hábil, uma vez que a instalação dos ovos e desenvolvimento das larvas de moscas causadoras de miíases, principalmente da Cochliomyia hominivorax, necessitam de um período médio de cinco dias para se desenvolverem e, normalmente, se alimentam de alguma lesão no tecido (MONTEIRO, 2014). O ciclo de vida dessa espécie revela que as moscas adultas colocam de 200 a 300 ovos nas bordas das feridas, e estas, uma vez infectadas, liberam um odor característico que estimulam outras moscas a ovipor (ROSSI et al, 2002;OLEA et al, 2014), aumentando, por sua vez, o número de larvas em cada lesão. Outros trabalhos também relataram um grande número de animais com diagnóstico de miíases (SCHNUR et al, 2009).…”

“…É geralmente causada por moscas da família Calliphoridae, e a Cochliomyia hominivorax é o agente etiológico mais frequentemente relacionado a esta enfermidade (OLEA et al, 2014).…”

Myiasis incidences reported in and around central province of Sri Lanka

“…Fly attraction and the severity of the larval infestation often depend on patients’ personal hygiene and level of sensation . The personal related factors, which caused for mental or physical disability status of the patient such as age, existing disease conditions, alcoholism, etc., had a direct effect on the level of sensibility and the sanitary condition of the patient .…”

Miasis nasal: informe de un caso y revisión del tema

“…Los factores del hospedero predisponentes a la miasis son los siguientes: exposición de las úlceras y hemorroides, tareas relacionadas con la crianza de ganado, infección bacteriana de las heridas o cavidades naturales, fallas en la higiene personal, comportamientos relacionados con el alcohol como la falta de sensibilidad y dormir al aire libre, lesiones resultantes del rascado por la picazón en pacientes con pediculosis (17,22), lepra, carcinomas malignos fungiformes, hemiplejia, discapacidad intelectual (23), enfermedades con compromiso circulatorio, diabetes mellitus, enfermedades psiquiátricas, demencia senil, alcoholismo, uso crónico de esteroides, desnutrición o cualquier otro estado de inmunosupresión, principalmente en pacientes de bajo estrato socioeconómico (10), traumatismo facial, heridas de extracción dental, tumoraciones, infecciones nosocomiales, adicción a drogas, cavidad bucal expuesta prolongadamente al ambiente lo que es común en pacientes con afecciones neurológicas, al igual que respirar por la boca durante el sueño, y la senilidad (7).…”