Diatoms in maggots; a potential tool for drowning diagnosis - A preliminary study

Advanced putrefaction causes extensive loss of soft tissue, rendering it difficult to use the diatom test as a reliable diagnostic tool for drowning investigations. A positive diatom test in carrion insect larvae may provide significant assistance in overcoming the challenge of decomposition. The studies determined the utility of diatom test in carrion larvae on severely decomposed bodies. A modified acid digestion method involving nitric acid, K2Cr2O7 and HCl, was used to digest the blowfly larvae feeding on piglet carrion previously drowned in freshwater and sea water, respectively. Extracted diatom frustules were analysed and characterised using light microscopy coupled to a digital camera. Diatoms recovered from maggots on sea-drowned piglets were similar to diatoms from sea water (drowning medium). Centric diatoms recovered in maggots were higher (200 ± 60 diatoms/ mL) than pennate diatoms (80 ± 20 diatoms/mL). Isolated diatoms common to both maggots and water samples included Coscinodiscus sp. and Navicular spp. Albeit, there were no diatoms recovered from maggots on freshwater-drowned piglets. The findings of this study suggest that the diatom test is still a reliable diagnostic tool to determine if drowning was involved in the death of a fully decomposed body. This is the first study that isolated diatoms from maggots feeding on drowned bodies. It serves as the basis for further research into the utility of maggots for drowning investigations.

Myiasis of open great toe fracture wound: a rare case report

Introduction and importance

Myiasis of an open fracture wound is very rare but can occur due to neglect of wound care.

Case presentation

A 12-year-old boy from a low socio-economic background, following an impact injury in his right great toe 10 days back presented with complaints of pain, swelling, and a foul-smelling odor from his right great toe. On examination, a swollen, tender puncture wound was noted over the dorsal aspect of the great toe revealing part of live larvae and serosanguinous discharge. Management was done with the complete removal of maggots, wound debridement, wound lavage, administration of systemic antibiotics, and toe guard slab application.

Clinical discussion

Wound myiasis results from a facultative or obligatory parasite that is initiated when flies oviposit in hemorrhagic, necrotic, or pus-filled lesions. The possible complications of myiasis include local destruction, invasion into deep tissues, and secondary infection, which could result in amputation of the affected area, especially where obligatory parasites are concerned.

Conclusion

Myiasis commonly occurs due to poor hygiene and neglect of wound care along with many other risk factors. Early proper wound care prevents the development of wound myiasis and early diagnosis and treatment of myiasis prevent complication of local tissue destruction and amputation of affected parts.

Cerebral Myiasis Secondary to Burr Hole Evacuation: A Rare Illustrative Case Report

Myiasis (maggot infestation) is a condition in which fly maggots feed off and develop in the tissues of living organisms. Most common in tropical and subtropical regions, human myiasis, is prevalent among individuals in close association of domestic animals and those inhabiting the unhygienic conditions. We, hereby, describe a rare case of cerebral myiasis (17th in the world, 3rd in India) that presented to our institution in Eastern India secondary in the operated site of craniotomy and burr hole few years back. Cerebral myiases are exceedingly rare conditions, especially in high-income countries with only 17 previously published cases with the reported mortality as high as 6 out of 7 cases dying of the disease. We additionally also present a compiled review of previous case literatures to highlight the comparative clinical, epidemiological features and outcome of such cases. Although rare, brain myiasis should be a differential diagnosis of surgical wound dehiscence in developing countries where conditions do exist in this country that permit myiasis. This differential diagnosis should be remembered, particularly when the classic signs of inflammation are not present.

Wohlfahrtiimonas chitiniclastica: A rare infection reported in an adult with liver cirrhosis

We present a case of a 60-year-old female with a history of liver cirrhosis, alcohol abuse, and chronic venous insufficiency who presented with maggot-infested wounds on her legs, bilateral buttocks, and groin area. Two sets of blood cultures grew Wohlfahrtiimonas chitiniclastica. She underwent wound debridement and treatment with cefazolin.

Diaphyseal Tibial Osteosarcoma With Myiasis

Osteosarcoma is a tumour that can originate in any bone and is the most frequent malignant tumour of the skeleton. It typically develops close to the metaphyseal growth plates in the limbs' long bones. The three most prevalent places are the femur, tibia, and humerus. Additional locations include the pelvis, skull, and jaw. Diaphyseal osteosarcoma involves a smaller population and is highly uncommon. Conventional kinds of osteosarcoma, such as osteoblastic, chondroblastic, and fibroblastic types, as well as telangiectatic, multifocal, parosteal, and periosteal types, are some of the variations of the disease. The primary bone tumour (cancerous) is generated by the formation of immature bone and primarily affects adolescents. We present a case of a 45-year-old menopausal female with left tibial osteosarcoma of the proximal 1/3 diaphysis infected with maggots and complaints of left knee pain and tingling.

Evaluating nursing opinion and perception of maggot therapy for hard-to-heal wound management

OBJECTIVE

Maggot therapy (MT) or larval debridement therapy is a recognised, effective but underutilised treatment for the management of hard-to-heal wounds and infected ulcers. It is available on NHS prescription in the UK, where wound management is predominantly nurse-led. Anecdotal reports and published literature suggest that nurses may be reluctant to utilise the therapy. The aim of this study was to evaluate the feelings and opinions of nurses regarding the use of MT.

METHOD

The first stage of this mixed-methods study was a focus group held to discuss MT and opinions of specialist nurse clinicians. Next, an anonymised web-based online survey was launched through the Nursing Times journal and distributed through social media targeting all nurses. Finally, in-depth interviews were held with specialist and generalist nurses.

RESULTS

Awareness of MT among all nurses was extremely high. A breakdown of results showed that MT was much more highly regarded by wound specialist nurses than non-wound specialist nurses. The latter exhibited a greater level of reluctance to administer the therapy, with almost one-third of these nurses surveyed saying they found maggots disgusting and that the idea of MT made their skin crawl. In-depth interviews revealed that a lack of knowledge about MT was a prime concern.

CONCLUSION

Wound specialist nurses are more likely to embrace MT than non-wound nurse specialists, who report a varying degree of wariness to MT. Our study highlights a need for better education and training in MT for all nurses, to address issues with acceptance and willingness to treat or help treat patients with hard-to-heal wounds which are suitable for MT.

An exploration of public perceptions and attitudes towards maggot therapy

OBJECTIVE

The aim of the study was to explore public opinion and perceptions of maggot therapy (larval therapy), a treatment option for hard-to-heal wounds.

METHOD

The study used a mixed-method approach to obtain quantitative and qualitative data. A focus group was convened to explore opinions and views of maggot therapy with a small group of members of the public. Analysis of emerging themes from the focus group was used to design an anonymised web-based survey, which was made available online to members of the public through email and social media.

RESULTS

The focus group participants identified four key themes concerning the acceptability of maggot therapy. The subsequent online survey was completed by 412 participants, analysis of which revealed some worries and fears. Only 36% of survey participants agreed that they would accept maggot therapy as a first choice for a hypothetical painful wound, although this number increased with wound severity. The most predominant concerns regarding maggot therapy were sensation and a feeling of disgust associated with the therapy. However, participants could see some benefits to maggot therapy.

CONCLUSION

Our study showed that public perception of maggot therapy is varied. Survey participants expressed worries and fears associated with its use. However, positive relationships existed between knowledge scores and potential acceptability of maggot therapy, suggesting that information dissemination and education may be an important factor in public perception and acceptability of maggot therapy.

Maggot debridement therapy in critical limb ischaemia: a case study

OBJECTIVE

In critical limb ischaemia (CLI), first-line therapy is revascularisation, but alternative treatment options are needed in certain cases. Maggot debridement therapy (MDT) is historically considered to be contraindicated in ischaemic ulcers. Wound care in patients with CLI is becoming increasingly diverse with the development of novel revascularisation strategies; therefore, CLI now needs to be reconsidered as an indication for MDT.

METHOD

We retrospectively reviewed five legs with CLI (five male, one female) treated with MDT between January 2013 and December 2017. Changes in skin perfusion pressure (SPP) around the ulcer before and after MDT were evaluated. One or two cycles of MDT were performed (eight in total). We also evaluated the proportion of necrotic tissue in the ulcer and the presence of exposed necrotic bone. The proportion of necrotic tissue in the ulcer was classified as NT 1+ (<25%), NT 2+ (25-50%), NT 3+ (50-75%) or NT 4+ (>75%).

RESULTS

When the proportion of necrotic tissue was >50%, with no exposed necrotic bone in the wound, an increase in SPP was observed after five (62.5%) of eight cycles of MDT. And with a proportion of necrotic tissue of <25% and/or exposed necrotic bone in the wound, a decrease in SPP was observed after three (37.5%) of eight cycles. Wound healing was accelerated in the presence of increased SPP.

CONCLUSION

Effective MDT with increased SPP requires an ulcerative state of necrotic tissue grade > NT 3+, with no exposed necrotic bone.

Severe Orbital Myiasis Caused by Chrysomya bezziana: A Case Report

An 88-year-old woman was brought to the hospital immediately after her neighbours noticed that she was bleeding from her right eye. On examination, her right eye was phthisic with maggot infestation of her right orbit. Over a hundred live maggots were extracted using forceps. Computed tomography scan revealed the infestation was confined to the right orbit. The patient underwent exenteration of the right orbit under general anaesthesia. The species was identified by an entomologist as Chrysomya bezziana, which has aggressive larvae that eat living tissue. This case report demonstrates that orbital myiasis caused by C. bezziana poses a very real risk of intracranial invasion as they feed on living tissues. Adjacent tissue destruction can be very rapid and definitive treatment involves urgent removal of its larvae via surgical debridement. To our knowledge, we are reporting the first case of orbital myiasis from a patient in Malaysia. Therefore, our case report may be helpful in the management of similar case of orbital myiasis.

Management of Oral Myiasis Caused by Chrysomya bezziana - A Case Series

Myiasis is a rare disease caused by infestation of tissue by larvae of flies. Oral myiasis is still rare and unique owing to the fact that the oral cavity rarely provides a necessary habitat for a larval life cycle. We discuss the definition, etiology, predisposing factors, classification, and management of myiasis. We hereby report a rare case of oral myiasis in a 75-year-old female with a history of maxillofacial trauma. She complained of pain in the lower lip and commissure region on the left side through which numerous live maggots (larvae) were seen crawling out. Postremoval of approximate seventy maggots resulted in lower lip defect along its commissure which was repaired by Bernard's modification of Gillies flap. Another case was an 18-year-old girl, a known case of congenital cerebral palsy with pain and swelling in the upper vestibule region. Prevention of myiasis involves addressing open wounds, maintaining good oral and personal hygiene, control of fly population, basic cleanliness of surrounding areas, and provision for basic sanitation and health education.

Management of Wound Myiasis in the Hospice and Palliative Medicine Setting

Complex wounds are common complications in hospice and palliative medicine (HPM), especially in patients with aggressive malignancies. Myiasis, or an infestation of maggots, is a rare but significant complication of such wounds. While uncommon in the United States, many HPM patients have multiple risk factors and comorbidities that increase their vulnerability to this condition. Currently, there are no standard diagnostic or treatment guidelines for wound myiasis. In addition, common management strategies may not be easily accessible in HPM settings. We present this case of a patient with malignant squamous cell carcinoma of the neck complicated by myiasis while in hospice, and our experience diagnosing and managing her infestation. We also reflect on special considerations for HPM patients when addressing the physical and psychological symptoms of wound myiasis.

Maggot Therapy in Wound Healing: A Systematic Review

BACKGROUND

It is estimated that 2% of the population in developing countries suffer from a chronic wound, making it a hidden phenomenon that is increasing as populations age. The ease of access to maggot therapy has made it increasingly attractive for implementation. This study aimed to explore the effectiveness of maggot therapy as compared to hydrogel dressings in the healing of chronic wounds.

METHODS

An electronic literature search until October 2019 was performed using Medline, Embase, and Cumulative Index of Nursing and Allied Health Literature. The eligibility criteria were chronic wound patients with an intervention that involved a comparison of any maggot species with hydrogel dressings.

RESULTS

The full text of five studies, involving 580 patients with chronic wounds, was retrieved. Four studies used the Lucilia sericata species. The maggot therapy facilitated faster and more effective debridement of non-viable tissue. It enabled faster development of granulation tissue and increased reduction in the wound surface area compared to hydrogel dressings. Maggot therapy had no effect on disinfection or complete healing rate for the wound.

CONCLUSION

Maggot therapy should be considered for faster wound debridement, granulation tissue development, and wound surface area reduction as well as in surgical contraindications. This review can be used as a guide to assist clinicians in identifying patients who may benefit from maggot therapy.

Ignatzschineria indica bacteremia in a patient with a maggot-infested heel ulcer: a case report and literature review

An elderly patient was admitted with sepsis to a community hospital. The individual was found to have a foot wound infested with maggots, and clinical evidence of cellulitis. A blood culture was positive on day 2 with Ignatzschineria indica . The patient was treated successfully with a combination of antibiotics and manual removal of the maggots. Poor living conditions were central to his presentation.

Use of maggot debridement therapy in hospitalised patients in Germany

Exact data regarding the clinical role of maggot debridement therapy (MDT) for wound care in a specific country are not available. Thus, we analysed the use of MDT in hospitalised patients in Germany. Detailed lists of all hospitalised cases treated with MDT in Germany for the years 2011 to 2016 were provided by the Federal Statistical Office as well as the lists of the 15 most frequent principal and additional diagnoses, respectively, and the 10 most frequent procedures documented with MDT in 2016. Within the 6-year time period of the study, the number of cases treated with MDT increased by 11% from 4513 in 2011 to 5.017 in 2016. Lower leg and foot were the most frequent anatomic sides of treatment counting up to 83.9% of all cases. In addition, MDT procedures for temporary soft tissue coverage including negative pressure wound therapy were often performed: for treatment of large areas in 36.7% and small areas in 6.2%. 41.3% of all cases treated with MDT had infection with Escherichia coli and 35.9% of all cases with Bacillus fragilis. Our analysis shows a limited use of MDT with a small increase only in the last 6 years in German hospitals. MDT is predominately used to treat foot or leg ulcers.

What is the optimal treatment time for larval therapy? A study on incubation time and tissue debridement by bagged maggots of the greenbottle fly, Lucilia sericata

The effective use of larvae of the greenbottle fly, Lucilia sericata, in wound debridement requires a working knowledge of how feeding changes over time. Using a laboratory assay and bagged larval dressings, the effect of incubation time on larval feeding rates and body mass was investigated for up to 120 hours at 32°C. The mass of tissue digested increased significantly in incremental 24-hour periods up to 72 hours, with no significant consumption occurring afterwards. Larval mass increased only up to 48 hours. A further test comparing the efficacy of a single 96-hour application of larvae against two consecutive 48-hour applications found that the mass of tissue digested in the latter was 14.3% higher than the former, a difference that was statistically significant. Current clinical guidance suggests a 4-day application period for bagged larvae. Based on these results, an incubation time of 72 hours (3 days) for bagged larvae would be the most effective at the study temperature. However, it is acknowledged that wound temperature can vary, whereby feeding rates would likely differ. In view of this, we conclude that a period of 3 to 4 days is optimum for the application of larvae, and current guidelines should be adhered to.

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.

Ignatzschineria cameli sp. nov., isolated from necrotic foot tissue of dromedaries (Camelus dromedarius) and associated maggots (Wohlfahrtia species) in Dubai

Five bacterial strains, UAE-HKU57^T, UAE-HKU58, UAE-HKU59, UAE-HKU60 and UAE-HKU61, were isolated in Dubai, UAE, from necrotic foot tissue samples of four dromedaries (Camelus dromedarius) and associated maggots (Wohrlfartia species). They were non-sporulating, Gram-negative, non-motile bacilli. They grew well under aerobic conditions at 37 °C, but not anaerobically. The pH range for growth was pH 7.0-9.0 (optimum, pH 7.5-8.0) and the strains could tolerate NaCl concentrations (w/v) up to 2 % (optimum, 0.5 %). They were catalase- and cytochrome oxidase-positive, but caseinase-, gelatinase- and urease-negative. Their phenotypic characters were distinguishable from other closely related species. Phylogenetic analyses of the almost-complete 16S rRNA gene and partial 23S rRNA gene, gyrB, groEL and recA sequences revealed that the five isolates were most closely related to undescribed Ignatzschineria strain F8392 and Ignatzschineria indica, but in most phylogenies clustered separately from these close relatives. Average nucleotide identity analysis showed that genomes of the five isolates (2.47-2.52 Mb, G+C content 41.71-41.86 mol%) were 98.00-99.97% similar to each other, but ≤87.18 % similar to other Ignatzschineriaspecies/strains. Low DNA relatedness between the five isolates to other Ignatzschineriaspecies/strains was also supported by Genome-to-Genome Distance Calculator analysis. The chemotaxonomic traits of the five strains were highly similar. They were non-susceptible (intermediate or resistant) to tetracycline and resistant to trimethoprim/sulphamethoxazole. The name Ignatzschineria cameli sp. nov. is proposed to accommodate these five strains, with strain UAE-HKU57^T (=CCOS1165^T=NBRC 113042^T) as the type strain.

Management of Malignant Wound Myiasis with Ivermectin, Albendazole, and Clindamycin (Triple Therapy) in Advanced Head-and-Neck Cancer Patients: A Prospective Observational Study

INTRODUCTION

Myiasis, tissue infestation by housefly larvae, is commonly found in malignant fungating wounds of cancer patients from climatic condition and lower socio-economic strata.

AIM OF STUDY

It was aimed to study the effectiveness of systemic Ivermectin, Albendazole& Clindamycin (Triple Therapy) in reducing signs & symptoms associated with maggots in malignant head and neck wounds.

METHOD

25 adult, advanced head and neck cancer patients presenting with maggots either from wound, oral cavity or nostril, with ECOG score 3 or less were enrolled in this study. Symptoms were assessed using Edmonton Symptom Assessment Scale (ESAS) and wound by Wound Assessment Tool - Hospice, at baseline and then Days 1, 3, 5, and 7. All patients received 3 days course of oral Ivermectin 12 mg per day, Albendazole 400 mg twice per day and Clindamycin 300 mg three times per day for 5 days along with Terpentine oil dressing. All patients received oral Morphine as per their pain score.

RESULTS

Mean age (yrs) and weight (Kg) were 42.15 ± 8.23 and 52.31 ± 5.18 respectively. 84% patients were male. Mean oral morphine dose was 100.38 mg. There was significant decrease in number of maggots from day 0 (77.28 ± 13.465) to day 1 (20.60 ± 7.263; 73.34% reduction) to day 3 (1.52 ± 2.104; 92.62% reduction). We found statistically significant improvement (P = <0.05) in scores of wound and all other related symptoms on days 1, 3, 5 & 7, except bleeding, edema, nausea, anxiety, appetite loss and feeling of wellbeing, which remained same on Day 1, but improved afterward. Side effects were self-limiting.

CONCLUSION

Systemic treatment with Ivermectin, Albendazole and Clindamycin (Triple Therapy) enhances the removal of maggots, early recovery and relief from distress and associated symptoms.

Sepsis secondary to complicated skin and soft tissue infection caused by Ignatzschineria indica. First case report in Latin America

Introduction

Ignatzschineria is a recently recognized genus associated with larvae infestation Members of this genus are pathogens infrequently implicated in human disease. During the last decade, fewer than 10 cases of infection with Ignatzchineria species have been reported around the world. Bacteria of the genera Ignatzchineria and Wohlfahrtiimonas have been isolated from larvae of the parasitic fly Wohlfahrtia magnifica, which is found in Europe, Asia and North Africa, and is associated with myiasis in several animal species, but rarely in humans.

Case presentation

We report the first case of sepsis associated with complicated skin and soft tissue infection caused by I. indica in Latin America.

Conclusion

The clinical and molecular findings in our report add information to the accumulating data on emerging pathogens of this type, their geographic distribution, the correlation between the emergence of infectious diseases and social and economic inequalities, as well as the effects of global climate changes on potentially unusual distribution of vectors. We consider that fly larvae should be regarded as a potential source of specific arthropod-borne bacterial systemic infections.

Improving malodour management in advanced cancer: a 10-year retrospective study of topical, oral and maintenance metronidazole

OBJECTIVES

To explore the relative effectiveness of topical or oral metronidazole used for malodour in necrotic cancers and to propose a protocol for metronidazole usage in managing malodour.

METHODS

A retrospective case note review of the management of malodour over 10 years comparing outcomes with topical, intermittent and maintenance oral metronidazole.

RESULTS

Among 179 patients treated for malodour, the commonest primaries were cervical (45%), and head and neck cancers (40%). Outcomes were poor during the period when only topical or intermittent oral metronidazole was used. Topical use gradually decreased (97% vs 55%) and the proportion of patients receiving maintenance oral metronidazole increased (0% in 2003-2004 vs 93% in 2011). Concurrently, there was reduction in documented malodour (12.5% of visits per patient in 2003-2004 vs 1.5% in 2011, p<0.01).

CONCLUSIONS

Our data support formulary guidelines recommending maintenance metronidazole for recurrent malodour. Dimethyl trisulfide, a product of anaerobic necrosis causes malodour and can attract maggot-producing flies to decaying tissues. Therefore, to reduce anaerobic malodour in vulnerable settings, we propose a ladder for metronidazole titration. High-risk patients should start with 400 mg thrice daily ×7 days and continue 200 mg once daily. The SNIFFF severity (Smell-Nil, Faint, Foul or Forbidding) can guide follow-up dosage: 200 mg once daily to continue for nil or faint smell; breakthrough courses of 400 mg thrice daily ×1 week for foul smell and 2 weeks for forbidding smell, followed by 200 mg once daily.The effectiveness and limitations of maintenance metronidazole and the SNIFFF ladder should be prospectively evaluated.

A case of Ignatzschineria bacteraemia in an unconscious man from the Netherlands

Introduction:

Ignatzschineria species were previously known as Schineria species and are well known inhabitants of the larvae of the parasitic fly Wohlfahrtia magnifica.

Case presentation:

We report a case of Ignatzschineria species bacteraemia in a Dutch patient with a wound infested with maggots.

Conclusion:

In the past, these bacteria have been isolated from Wohlfahrtia magnifica, a fly not indigenous to The Netherlands. Other fly larvae such as the blowfly larvae probably infested the wound and harboured this Ignatzschineria strain which subsequently caused this bacteraemia. A two-week course of amoxicillin/clavulanic acid was given with good clinical response.

Maggot debridement therapy as primary tool to treat chronic wound of animals

Maggot debridement therapy (MDT) is a safe, effective, and controlled method ofhealing of chronic wounds by debridement and disinfection. In this therapy live, sterile maggots of green bottle fly, Lucilia (Phaenicia) sericata are used, as they prefernecrotic tissues over healthy for feeding. Since centuries, MDT is used in humanbeings to treat chronic wounds. Lately, MDT came out as a potent medical aid in animals. In animals, although, this therapy is still limited and clinical studies are few. However, with the increasing antibiotic resistance and chronic wound infections in veterinary medicine, maggot therapy may even become the first line of treatment for some infections. This paper will present a brief discussion of MDT and its role in veterinary medicine that may add one more treatment method to utilize in non-healing wounds of animals and overcome the use of amputation and euthanasia. The objective of this review paper is to assemble relevant literature on maggot therapy to form a theoretical foundation from which further steps toward clinical use of maggot therapy in animals for chronic wounds can be taken.

Temporal and Spatial Analysis of the New World Screwworm (Cochliomyia hominivorax) in Darien and Embera, Panama (2001-2011)

Larvae (maggots) of Cochliomyia hominivorax, the New World Screwworm fly, are voracious consumers of living flesh that have a negative economic impact by decreasing productivity, predisposing to other pathogens, and, in severe cases, causing death of domestic livestock. Screwworm caused extensive financial losses to the livestock industry in North America prior to its eradication. Sterile insect technique (SIT) was used to eradicate screwworm throughout North and Central America and continues to be the main tool to control it in eastern Panama. The goal of this study was to evaluate the temporal and spatial trends of screwworm myiasis cases reported in the Province of Darien and Comarca Embera (border with Colombia), Panama, from 2001 to 2011. We hypothesized that screwworm cases would vary seasonally and be spatially clustered near Colombia as a result of effective eradication strategies in Panama and the presence of an autochthonous population of flies in western Colombia. Temporal and spatial data were retrieved from COPEG-USDA records (Panama) and analysed by anova, Ripley's K function, discrete Poisson spatial statistic scan and Getis-Ord Gi*. No significant temporal trend was found, but cases were spatially distributed in four clusters. One cluster of cases occurred from 2001 to 2003 and was considered a focal temporal and spatial cluster. One cluster occurred in 2001 and 2007 indicating more rare outbreaks in an area with fewer cattle. The two remaining clusters contained cases from 2004 to 2011 and 2001 to 2011 suggesting regular breaks in the control barrier due to occasional failures of the SIT programme, difficulties implementing border quarantine strategies, livestock smuggling or the movement of infested wildlife.

An unusual evolution of a case of Klippel-Trenaunay syndrome

Klippel-Trenaunay syndrome (KTS) is a rare congenital disorder. KTS can be diagnosed on the basis of any 2 of 3 features: cutaneous capillary malformations, soft tissue or bony hypertrophy and varicose veins. We present an unusual case of KTS complicated by an infection of venous ulcers of the lower limb by larvae. The treatment of infection was a complete debridement; however baseline treatment of KTS is still in evaluation.

Myiasis of the ear: a review with entomological aspects for the otolaryngologist

OBJECTIVE

Myiasis is the infestation of live humans (or animals) by fly larvae. Although the diagnosis is relatively straightforward, how to best treat aural myiasis has not been well described in the literature. This comprehensive literature review, therefore, was performed to identify current management principles in aural myiasis, especially with regard to the causative fly family. In addition, we explore the possible relationship between aural myiasis and the highly lethal intracranial myiasis.

DATA SOURCES

Literature review using the Medline database (PubMed), Scopus, and Google Scholar.

REVIEW METHODS

Manuscripts published in the English language between January 1, 1992, and December 31, 2012, were included.

RESULTS

Forty-five cases of aural myiasis were reported in 34 manuscripts. Most cases were caused by species of the Sarcophagidae family (n=26/45, 57.8%). The majority of cases (n=40/45, 88.9%) were successfully treated with simple aural toilet and topical treatments alone. No deaths were reported and no cases were seen in conjunction with intracranial myiasis.

CONCLUSION

Aural myiasis is a rare but benign fly infestation of the ear, most commonly by species of the Sarcophagidae family. The overwhelming majority of cases can be successfully managed without the need for surgical intervention.

Oral myiasis involving palatal mucosa of a young female

In literal terms myiasis is the invasion of the tissues and organs of human beings by fly larvae. This phenomenon is well documented in the skin, especially among animals and people in developed and developing countries. When the tissues of oral cavity are invaded by the parasitic larvae of flies, the condition is called as oral myiasis. With the paper we are presenting a case of 19-year-old female suffering from oral myiasis of upper lip and palate. The treatment consisted of manual removal of the larvae, surgical debridement of the wound and oral therapy with doxycycline used as a locally acting drug for faster and better recovery.

Evaluation of the influence of the antibiotic ciprofloxacin in the development of an Old World screwworm fly, Chrysomya putoria

Chrysomya putoria (Wiedemann) (Diptera: Calliphoridae), an Old World screwworm fly, is a species with potential for maggot therapy practice and has been described in myiasis and forensic entomology studies. The objective of the present study was to assess the action of different ciprofloxacin concentrations on the growth and development of C. putoria. First instar maggots of the third generation were raised on 60 g of chicken gizzard homogenate in 65% agar diet and received ciprofloxacin chloridrate. Each concentration of the antibiotic tested (3.33 µg/mL, 6.66 µg/mL, and 13.33 µg/mL) and the control (no antibiotic) were replicated four times (40 maggots/replication). The control received distilled water instead of the antibiotic. Maggots were kept in an acclimatized chamber at 30° C during the day and 28° C at night, with 70 + 10% RH and a 14:10 L:D photoperiod. They were weighed in batches of five and stored in test tubes sealed with nylon fabric and elastic. Microsoft Excel and STAT were used for the analysis. The variation among the maggot weight means and the duration of the maggot stage, pupal stage, and time to total development (neolarvae to adult) were analyzed by Student's t-test (α= 5%). The viabilities and the normality rates were compared using ANOVA, and the expected sex ratio frequency was tested by the chisquared test (χ(2)). There was no significant difference among the four treatments regarding mean individual maggot weight, mean duration of the maggot inoculation until abandonment, the duration of the maggot and pupal stages, and the total duration of all stages. The sex ratios found in the four treatments did not differ from the expected. Only treatment 2 (6.66 µg/mL concentration of ciprofloxacin) differed significantly from the control in maggot and total viability. The antibiotic did not seem to alter C. putoria development in the postembryonic period.

Orbital myiasis caused by green bottle fly

An 80-year-old farmer, presented with large, maggot infested ulceration involving the medial part of the right upper lid. The left eye was phthisical. There was history of untreated traumatic laceration of the right upper lid. Mechanical removal of maggots was done under turpentine coverage with regular antibiotic dressing. Microbiological examination of maggots revealed the larvae to be of Lucilia sericata (green bottle fly). The ulceration completely healed in two weeks following manual removal of maggots and regular dressing. Orbital myiasis is an uncommon clinical condition, with isolated case reports in literature.

Myiasis of the foot and leg caused by Chrysomya bezziana

Myiasis is the infestation of the skin and mucous membranes by fly larvae. Myiasis of the lower extremity caused by Chrysomya bezziana is rarely fatal, but it can be associated with considerable morbidity. Proper wound exploration and en masse removal of all the larvae using thorough wound debridement can eradicate the infestation and promote wound healing. In the present report, the management of 4 separate cases of lower extremity infestation with fly larvae is described.

Oral myiasis in an adult associated with filariasis and Hansen's disease

Oral myiasis is a common parasitic infestation of live human and animals caused by species of dipteran fly larvae known as maggots which may be secondary to medical disease. This case involves a 51-year-old female, poorly debilitated with advanced periodontal disease infected by the dipteral larvae in the anterior maxillary region which belonged to the family Calliphoridae and Chrysomya bezziana species. This lady was neglected from her family and presented oral myiasis with the previous history of filariasis and Hansen's disease. Secondary infestations may occur in cancrum oris, oral extraction wounds, jaw bone wounds, oral leprosy lesion, filariasis, and carcinoma. Hansen's disease (leprosy) is bacterial in origin whereas filariasis (elephantiasis) is parasitic in origin like-myiasis. The treatment consisted of manual removal of the larvae by topical application of turpentine oil, oral therapy, and surgical debridement of the oral wound.

Myiasis in female external genitalia

Myiasis is derived from the Greek word-"Myia", meaning "fly". The term was first introduced by Hope in 1840 and refers to the infestation of human beings with dipterous larvae (maggots). Presence of maggots on exposed parts is already known, but on covered parts like external genitalia it is very rare. We hereby describe a case of young unmarried female who presented with multiple sinuses over external genitalia along with maggots coming out of it.

The use of insects in forensic investigations: An overview on the scope of forensic entomology

Forensic entomology is the study of insects/arthropods in criminal investigation. Right from the early stages insects are attracted to the decomposing body and may lay eggs in it. By studying the insect population and the developing larval stages, forensic scientists can estimate the postmortem index, any change in position of the corpse as well as the cause of death. Forensic odontologists are called upon more frequently to collaborate in criminal investigations and hence should be aware of the possibilities that forensic entomology have to offer and use it as an adjunct to the conventional means of forensic investigation.

Oral myiasis in children

Oral myiasis is a rare condition in humans and is associated with poor oral hygiene, severe halitosis, mouth breathing during sleep, mental handicap, cerebral palsy, epilepsy, anterior open bite, incompetent lips, and other conditions. In this report, a 14 year-old boy who had an orofacial trauma in the maxillary dentoalveolar region,which was neglected, has been described. There was a deep lacerated wound on the upper vestibule which was infected and maggots were found on the same wound. The clinical features, management, treatment are discussed and relevant literature is reviewed.

Alternative diets for Chrysomya putoria, an Old World screwworm fly

Abstract The purpose of this study was to evaluate the post-embryonic development of Chrysomya putoria (Wiedemann 1818) (Diptera: Calliphoridae) reared on a diet of gizzard or gizzard/agar homogenate, with a diet of beef used as the control. Four replicates per treatment were performed (60 mL of each diet). The gizzard (60%), distilled water, and agar homogenate were combined in a blender. Each replicate consisted of 40 newly hatched larvae of C. putoria (5(th) generation). Each glass beaker containing a diet was inserted into a larger flask containing sawdust, which was covered with a nylon cloth held in place by an elastic band. The larvae were weighed and stored in test tubes sealed with a nylon cloth and an elastic band. The average temperature, measured with a thermohygrograph, was 20.6 °C, and the average relative humidity was 67.7%. The variation in the mean weight of mature larvae and in the duration of the larval, pupal, and total stages (newly hatched larvae to imagoes) were analyzed by Student's t-test (α = 5%), while viability was compared by ANOVA. The sex ratio was evaluated by the chi-squared test. The average duration of the period from the larval to imago stage was 8.868 days on the beef diet, 8.676 on the gizzard diet, and 9.067 on the gizzard/agar homogenate diet. Larval survival rates on these diets were 98, 92, and 73%, respectively, while pupal viabilities were 98, 91, and 71%, respectively, and larva-to-imago viabilities were 93, 83, and 64%, respectively. The duration of the pupal period differed significantly between the blowflies reared on the beef and gizzard/agar homogenate diets. The two diets proved to be good alternatives for rearing C. putoria.

Vidi, vini, vinci: External ophthalmomyiasis infection that occurred, and was diagnosed and treated in a single day: A rare case report

Ophthalmomyiasis is an infestation of eye with larvae or maggots of certain flies. Oestrus ovis (sheep nasal botfly) belonging to family Oestridae is the most common cause of human myiasis. We describe here an acute presentation of a case of external ophthalmomyiasis, i.e., infestation of conjunctiva due to first instar larvae of Oestrus ovis. In this case report the occurrence, diagnosis and treatment all took place in the setting of a single day. Prompt treatment by removal of larvae mechanically followed by instillation of antibiotic and steroid eye drops helped to prevent serious complications. The taxonomic identification of fly is also important as some fly species are capable of penetrating deeper tissues of eyes, which is sight threatening.