Oftalmomiasis orbitaria por Dermatobia hominis en un paciente inmunosuprimido en un área andina ecuatoriana / Orbital ophthalmomiasis due to Dermatobia hominis in an immunosuppressed patient from the ecuadorian andean area

Varón ecuatoriano de 83 años, indigente, con antecedente de desnutrición y alcoholismo crónico, acude por un cuadro clínico caracterizado por crecimiento progresivo de larvas a nivel ocular izquierdo (OI), asociado a áreas de putrefacción de tejidos oculares. Al ingreso, su visión en ojo derecho (OD) fue de movimiento de manos y el OI indicaba no percepción de luz, el segmento anterior de OD evidenció una catarata brunescente, sin otra alteración, mientras que el OI presentó edema, eritema bipalpebral y abundante cantidad de larvas móviles distribuidas en toda la órbita, asociado a áreas de necrosis, putrefacción y distorsión de la anatomía de los tejidos oculares. La tomografía de órbita mostró un compromiso importante de la órbita, indicándose manejo quirúrgico mediante exenteración orbitaria izquierda con identificación taxonómica de las larvas como Dermatobia hominis, asociado a ello, se implementó tratamiento antibiótico y realización de un colgajo fasciocutáneo frontal por el Departamento de Cirugía Plástica (AU)

An 83-year-old Ecuadorian male, indigent with a history of malnutrition and chronic alcoholism, presented with a clinical feature characterized by progressive growth of larvae at the left eye level (LE), associated with areas of ocular tissue putrefaction. Upon admission, his vision in the right eye (RE) was of hand movement and no light perception in LE, the anterior segment of the RE showed a brunescent cataract, with no other alteration, while the LE presented edema, bipalpebral erythema and an abundant number of mobile larvae distributed throughout the orbit, associated with areas of necrosis, putrefaction and distortion of the anatomy of the ocular tissues. Orbital tomography showed a significant compromise of the orbit, indicating surgical management by left orbital exenteration with taxonomic identification of the larvae as Dermatobia Hominis associated with it, antibiotic treatment was implemented and a frontal fasciocutaneous flap was performed by the plastic surgery department (AU)

Perioperative challenges in managing a patient with COVID-19 undergoing debridement for massive scalp myiasis.

A young man presented to our centre needing an urgent debridement of his postcraniotomy wound due to massive myiasis during the COVID-19 pandemic in October 2020. Prior to the surgery, his nasopharyngeal swab real-time PCR test result was unknown. One day later, it returned as SARS-CoV-2 positive. All healthcare workers who were involved in the patient management avoided cross infection as they wore appropriate personal protective equipment. This article depicts the importance of adequate preparations when handling potentially infectious patients and the perioperative issues associated with it.

Rhinomyiasis: clinical and surgical management.

Myiasis by Oestrus ovis, the zoonotic infestation with Diptera larvae, primarily diagnosed in goats and rams in tropical and Mediterranean countries, is an uncommon disease in humans; indeed, literature data are still lacking. Nevertheless, few cases of human myiasis have been reported, leading to benign or severe complications. Here, we report a rare case of human rhinomyiasis detected in Northern Italy. A 39-year-old Italian woman, returning from vacation in Corsica, showed several sinusal symptoms and progressive asthenia and was therefore admitted at the Otorhinolaryngology Unit of Biella Hospital, Italy. Endoscopic examination of the nasal cavity revealed some formations, morphologically identified as O. ovis larvae. The patient then underwent endoscopic sinus surgery, followed by complete resolution of symptoms. Clinical presentation, diagnostic work-up and therapeutic procedures have been compared with few other cases found in the literature.

First report of furuncular myiasis in a domestic dog caused by Dermatobia hominis (Linnaeus, 1781) in Colombia.

This paper reports a case of furuncular myiasis caused by Dermatobia hominis in a domestic dog from Colombia. A male domestic dog, German shepherd breed, of approximately 2 years old was brought for medical consultation. The reason was the presence of one furuncular lesion and discomfort in the patient. Clinical examination revealed a wound over the sacral area similar to an inflammatory papule, with a central punctum exuding a serosanguinous discharge. In the medical examination was applied pressure around the wound, that allowed evidencing a larva inside the tissue. The applied treatment was surgical removal of the larva in the dog. Treatment was complemented with Cephalexin (20 mg / kg, twice a day orally for 7 days), Meloxicam (0.2 mg / kg, once a day orally for 3 days) and cleaning with chlorhexidine, three times a day until removal of points 7 days later. The larva was sent to Parasitology laboratory of the UDES for morphology identification. The larva was identified as Dermatobia hominis.

Orbital myiasis: A case report and literature review.

RATIONALE: Myiasis is a parasitic disease caused by fly larvae of the Diptera order that infest human and other vertebrate animal tissues. Orbital myiasis is a potentially destructive infestation of the orbital tissues, which may affect individuals with previous ocular diseases or disorders of consciousness. PATIENT CONCERNS: A 72-year-old man presented with a complaint of repeated pain for two years after trauma to his right eyelid and aggravated symptoms with larvae wriggling out for 2 days. An orbital computed tomography scan revealed right eyeball protrusion and periocular soft tissue edema. Two days later, magnetic resonance imaging showed that the shape of the right eyeball was changed and that the normal structure of the eyeball could not be identified. DIAGNOSES: Due to the patient's symptoms and imaging examination results, the diagnosis of orbital myiasis was made. INTERVENTIONS: The patient was treated by exenteration of the right orbit, and all necrotic tissues and larvae were removed. The defect was repaired via reconstruction with a pedicled musculocutaneous flap from the forehead region. Antibiotics and tetanus toxoid therapy were utilized to prevent potential bacterial infection. OUTCOMES: The patient recovered well postoperatively and was discharged uneventfully. During the 6-month follow-up period, the wound healed well. LESSONS: Advanced age and untreated eye trauma are risk factors for orbital myiasis. Timely removal of larvae and elimination of infections are important measures for protecting the eyeball.

Ether for Wound Debridement of Wild Maggots.

Myiasis is defined as an infestation of the organs or tissues of live vertebrates (humans or animals) by dipterous larvae, commonly referred to as maggots. Wound myiasis is a common presentation in the emergency department. The presence of wild maggots and larvae in wounds is concerning for subsequent myiasis-induced infections and complications. Proper extraction of wild maggots and larvae is required to avoid complications that may occur with wound myiasis. Surgical debridement is often utilized to extract wild maggots and larvae, but can be painful and time-consuming. There is limited literature available on alternative approaches for removal of wild maggots and larvae. We present a case of lower extremity wound myiasis that had wild maggots and larvae successfully removed with no complications using ether. This procedure is a novel, noninvasive, and pain-free way to extract wild maggots and larvae from wound myiasis.

Otorhinolaryngological myiasis: the problem and its presentations in the weak and forgotten.

INTRODUCTION: Myiasis is common in tropical regions, but now increasing incidence is seen in the west due to international travel. Otorhinolaryngological myiasis is uncommon and is seen in diabetics, alcoholics or patients unable in self-care. OBJECTIVES: To study presentations of otorhinolaryngological myiasis, identify associated risk factors and species of flies causing myiasis. METHODS: Clinical findings and co-morbidities of 67 myiasis cases were noted. Maggots were identified, manually removed, and patients were managed with topical treatment, systemic ivermectin and antibiotics. FINDINGS: Thirty-three nasal myiasis, 13 aural myiasis and 5 patients with oral myiasis were noted. Seven patients with head neck wounds myiasis and nine patients of tracheostome myiasis were recorded. DISCUSSION: Warm humid climate of tropical regions is a major concern along with co-existing conditions like poor sanitation, alcoholism, psychiatric diseases and neuropathies. Hesitancy is seen in attendants and health care professionals to deal with myiasis. CONCLUSION: Awareness about risk factors is important in avoiding myiasis along with prompt treatment which reduces morbidity. Tracheostome myiasis is an under-documented entity rather than a rare presentation. FUNDING: None.

Case Report: Nasal Myiasis in an Elderly Patient with Atrophic Rhinitis and Facial Sequelae of Leprosy.

We describe a case of nasal myiasis in an 89-year-old Brazilian patient affected by leprosy with severe nasal sequelae. An initial treatment comprising sinusectomy combined with nasal endoscopy removed more than 300 larvae, supplemented by systemic treatment using oral and topical ivermectin and levofloxacin. Infestation recurred after 2 months, was treated similarly, and resolved completely. The case could be attributed to severe nasal leprosy sequelae, with a lack of sneezing reflex, painless ulceration, atrophic rhinitis (ozena), and inability to clean the nose properly due to hand and nose impairment. This case illustrates the importance of long-term medical follow-up of patients with leprosy sequelae.

Intratracheal myiasis followed by tracheal-esophageal fistula: report of a rare case and literature review.

BACKGROUND: To enhance awareness of the clinical features and prevention of endotracheal myiasis. CASE PRESENTATION: A case of intratracheal myiasis is reported. A 61-year-old male patient with a history of laryngectomy was admitted to hospital due to tracheostomal hemorrhage of 3 h duration. Intratracheal myiasis was confirmed by bronchoscopy, and the patient underwent bronchoscopic intervention, which was complicated by a tracheal-esophageal fistula and resolved by endotracheal stenting. Twenty months after stent placement, the fistula had not healed. CONCLUSION: Intratracheal myiasis has serious complications and is difficult to treat. For post-tracheostomy patients, healthcare providers and caregivers should pay attention to the care and monitoring of wounds and maintenance of a tidy, clean living environment to prevent intratracheal myiasis.

Mastoid Cavity Myiasis: A Case Report and Review of the Literature.

OBJECTIVE: We report a case study of mastoid cavity aural myiasis in an urban developed setting and review the relevant literature. DATA SOURCE: Retrospective case report and review of the English literature via PubMed. DATA SELECTION: English-language articles concerning aural myiasis and mastoid cavity myiasis were included. DATA EXTRACTION: Two previous case reports of mastoid cavity myiasis were identified and analyzed. CONCLUSION: Neglected mastoid cavity care, low socioeconomic status, poor personal hygiene, homelessness, and chronic suppurative otitis media are likely contributing factors to this uncommon presentation occurring in an urban setting.

Rare cutaneous myiasis of the face due to Lund's fly (Cordylobia rodhaini) in a British traveller returning from Uganda.

We present a rare cause for cutaneous furuncular myiasis in a 55-year-old British traveller returning from Uganda. Initially presenting with what appeared to be a cellulitic furuncle on her forehead, she returned to the emergency department 3 days later with extensive preseptal periorbital swelling and pain. Occlusive treatment with petroleum jelly was applied and one larva manually extracted and sent to London School of Tropical Medicine for examination. It was identified as Lund's Fly (Cordylobia rodhaini), a rare species from the rainforests of Africa with only one other case reported in the UK since 2015. Ultrasound imaging identified another larva, necessitating surgical exploration and cleaning. The lesion subsequently healed completely and the patient remains well.

Genital myiasis associated with genital piercing. Case report

ABSTRACT CONTEXT: Myiasis is caused by larval infestation that usually occurs in exposed wounds. Dermatobia hominis is the most common fly species responsible for this parasitic infection. Genital piercing is an ornamental practice used in certain social circles. At placement, it transverses the skin surface and, as such, may be related to complications. CASE REPORT: We report a case of a 31-year-old man with a history of wound infection secondary to genital piercing who was exposed to an environment with flies, leading to myiasis. Mechanical removal and systemic antiparasitic drugs are possible treatments for myiasis. However, prevention that includes wound cleaning and dressing is the best way to avoid this disease. CONCLUSIONS: Genital piercing can lead to potential complications and myiasis may occur when skin lesions are not properly treated.

Myiasis Phenomenon in a Patient Receiving Maggot Debridement Therapy.

OBJECTIVE: Classical treatment was administered on the wound on the left foot of the patient, but no improvement was observed. When advised to undergo amputation, the patient came to the wound care unit to treat the larval wound. It was observed that the wound had been wormed while the patient was undergoing larval treatment. Interestingly, this incidental encounter was thought to be appropriate for case presentation. METHODS: The larvae seen in the left hand of the patient were removed using forceps and sent to a laboratory. The larvae as well as adult flies obtained from them were examined directly and stereomicroscopically, their photographs were captured, and they were typed. RESULTS: The larvae in the third stage and adult flies were identified as Sarcophaga sp. CONCLUSION: Hygiene deficiency, inadequate sanitation, and improper wound care are important factors responsible for myiasis formation. We believe that myiasis can be avoided if adequate sanitation and hygiene and appropriate and regular wound care are provided.

Imported and Autochthonous Cases of Myiasis Caused by Dermatobia hominis: Taxonomic Identification Using the Internal Transcribed Spacer Region.

Dermatobia hominis is a fly endemic to and widely distributed throughout the Americas; it is found from the southern regions of Mexico to Argentina. However, because of widespread travel, myiasis has become common in countries where neither the disease nor the species that cause this infection are endemic. Central Mexico, for instance, is not a region where myiasis is endemic. We, thus, describe three cases of D. hominis myiasis: two autochthonous cases from the southern part of Mexico and one imported from Costa Rica. In addition, morphological and genetic identification was performed on the maggots extracted from the patients.

Oftalmomiasis externa por Dermatobia hominis. A propósito de un caso / External ophthalmomyiasis due to Dermatobia hominis. A case report

Mujer de 46 años, sin antecedentes de interés, natural de Honduras y residente en España desde hace un mes y medio. Acude a urgencias por inflamación del párpado superior del ojo derecho, con zona que simula absceso. Se procede a drenado del mismo (sin obtener apenas contenido purulento), se prescribe tratamiento con antibióticos y antiinflamatorios tópicos y orales. A la semana siguiente acude con mejoría del cuadro inflamatorio, pero con molestias y erosiones corneales. Tras eversión del párpado superior se observa parásito tipo «gusano» emergiendo del tarso. Se completa extracción del mismo con pinza, identificándose como Dermatobia hominis (Dh) mediante examen en fresco. La evolución posterior de la paciente resultó favorable. DISCUSIÓN: La celulitis preseptal en pacientes procedentes de zonas tropicales y subtropicales puede ser causada por Dh

A 46-year-old woman with no relevant medical history, native of Honduras and resident in Spain for one and a half months. The patient went to the Emergency Department due to inflammation of the upper eyelid of the right eye, with an area that simulated an abscess. This was drained (obtaining hardly any purulent content). Treatment was prescribed with oral and topical antibiotics, as well as an anti-inflammatory drug. One week later the patient returned, with improvement of the inflammatory signs, but with discomfort and corneal erosions. After eversion of the upper eyelid, a «worm» type parasite emerged from the tarsus. The extraction was completed with a clamp, and was later identified as Dermatobia hominis (Dh) by examination of a fresh specimen. The subsequent outcome of the patient was favourable. DISCUSSION: Preseptal cellulitis in patients from tropical and sub-tropical areas can be caused by DH

Genital myiasis associated with genital piercing. Case report.

CONTEXT: Myiasis is caused by larval infestation that usually occurs in exposed wounds. Dermatobia hominis is the most common fly species responsible for this parasitic infection. Genital piercing is an ornamental practice used in certain social circles. At placement, it transverses the skin surface and, as such, may be related to complications. CASE REPORT: We report a case of a 31-year-old man with a history of wound infection secondary to genital piercing who was exposed to an environment with flies, leading to myiasis. Mechanical removal and systemic antiparasitic drugs are possible treatments for myiasis. However, prevention that includes wound cleaning and dressing is the best way to avoid this disease. CONCLUSIONS: Genital piercing can lead to potential complications and myiasis may occur when skin lesions are not properly treated.