Myiasis by Screw Worm Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae) in a Wild Maned Wolf Chrysocyon brachyurus (Mammalia: Canidae), in Brasília, Brazil

Cansi, ER; Bonorino, Rafael; Ataíde, HS; Pujol-Luz, José Roberto

doi:10.1590/s1519-566x2011000100025

Cited by 8 publications

(2 citation statements)

References 4 publications

(3 reference statements)

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“…128 This unknown quality explains why, although flies are often able to find and colonize remains with minutes of death, sometimes flies colonize an animal before death when wounds are present (ie, myiasis) or sometimes hours or days after death despite an otherwise normal process of decomposition. 6,39,44,45,80 This variation in colonization time presents a problem when attempting to use insects to determine PMI: the complex nature of their searching and colonizing mechanisms means they may or may not lay eggs on animal remains minutes after the animal dies. Entomologists therefore create a ''time of colonization estimation'' when analyzing insects on remains.…”

Section: Time Of Colonization: General Considerationsmentioning

confidence: 99%

Forensic Entomology in Animal Cruelty Cases

Brundage

Byrd

2016

Vet Pathol

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Forensic entomology can be useful to the veterinary professional in cases of animal cruelty. A main application of forensic entomology is to determine the minimum postmortem interval by estimating the time of insect colonization, based on knowledge of the rate of development of pioneer colonizers and on insect species succession during decomposition of animal remains. Since insect development is temperature dependent, these estimates require documentation of the environmental conditions, including ambient temperature. It can also aid in the detection and recognition of wounds, as well as estimate the timing of periods of neglect. Knowledge of the geographic distribution of insects that colonize animal remains may suggest that there has been movement or concealment of the carcass or can create associations between a suspect, a victim, and a crime scene. In some instances, it can aid in the detection of drugs or toxins within decomposed or skeletonized remains. During animal cruelty investigations, it may become the responsibility of the veterinary professional to document and collect entomological evidence from live animals or during the necropsy. The applications of forensic entomology are discussed. A protocol is described for documenting and collecting entomological evidence at the scene and during the necropsy, with additional emphasis on recording geographic location, meteorological data, and collection and preservation of insect specimens.Keywords forensic entomology, postmortem interval estimation, forensic pathology, insects, insect succession Forensic entomology, or the application of arthropod science to legal matters, has steadily increased its prominence within the forensic sciences. 5,28,41,46,77 While this definition allows for a broad interpretation of the scope of this science, forensic entomology is most commonly associated with use in death investigations.Although entomology has been used at crime scenes for centuries, research in recent decades has resulted in a significant advance of forensic entomological knowledge. 8,26,150 As a result, it is now commonly known that insect and arthropod evidence can assist in estimation of the postmortem interval (PMI) by the time of insect colonization on remains. 4,9,40,41,46,53 It can also aid in the detection and recognition of wounds, serve as indicators of perimortem and postmortem treatment of remains, and demonstrate neglect in both humans and animals 7,26,27 (Fig. 1). Arthropods may also be used to create associations between a suspect, a victim, and a crime scene. In some instances, it can aid in the detection of drugs or toxins within decomposed or skeletonized remains. 43,73 Recent research has even focused on the analysis of insect gut contents to determine the species on which fly larvae had fed. 43,87 These uses have made forensic entomology an invaluable tool for the death investigator.While the bulk of forensic entomological applications has been in human death investigations, recent years have seen an increase in forensic entomology...

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Section: Time Of Colonization: General Considerationsmentioning

confidence: 99%

Forensic Entomology in Animal Cruelty Cases

Brundage

Byrd

2016

Vet Pathol

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“…There are a few records of myiasis in free-ranging mammals in Brazil, including in maned wolf (Chrysocyon brachyurus) (Cansi et al, 2011), porcupine (Coendou prehensilis) (Lacey & George, 1981), opossum (Didelphis marsupialis) (Reis et al, 2008) and gracile mouse opossum (Gracilinanus sp.) (Reis et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

First report of myiasis caused by Cochliomyia hominivorax in free-ranging giant otter (Pteronura brasiliensis)

Foerster

Soresini²,

Paiva

et al. 2022

Rev. Bras. Parasitol. Vet.

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Giant otters are territorial semi-aquatic mammals. It is common to find several individuals exhibiting wounds and scars due to intraspecific conflicts. Myiasis is a parasitic infestation on living tissues of vertebrates caused by dipterous larvae, that usually develops in freshly open wounds and can seriously threaten the host’s health. Ectoparasites seem to be rare among giant otters and myiasis had not been recorded in this species until now. Here, is presented one record of myiasis in a free-ranging giant otter found dead in the Pantanal, Brazil. An ulcerative lesion was found in the frontoparietal region, from which 22 larvae were recovered and identified as Cochliomyia hominivorax. The low occurrence of ectoparasites in giant otters might reflect their semi-aquatic habits and their grooming behavior, which makes it difficult for parasites to remain on the skin. The injured otter probably got the larvae after an intraspecific fight. Agonistic encounters between groups of giant otters have been reported before and these fights can result in serious wounds or even death. It was hypothesized that the myiasis caused by C. hominivorax deteriorated the health of the infested giant otter, which prevented recovery and accelerated its death.

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Blowflies (Diptera, Calliphoridae) Associated with Pig Carcasses in a Caatinga Area, Northeastern Brazil

et al. 2014

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Studies that focused on Calliphoridae associated with pig carcasses are abundant in southern and southeastern Brazil; however, there are few in northeast. Here, we present an inventory of the blowfly species associated with the stages of decomposition of pig carcasses in a caatinga area during dry and rainy seasons. The study took place at the Private Reserve for the Environmental Inheritance "Fazenda Almas," state of Paraíba, Brazil. Using a modified version of the Shannon trap, 32,909 adult specimens belonging to eight species were captured. During the dry season, Cochliomyia macellaria (Fabricius) (52.2%) and Chrysomya albiceps (Wiedemann) (39.9%) were the most abundant species. In the rainy season, when the majority of individuals were captured (93.7%), Chloroprocta idioidea (Robineau-Desvoidy) (71.1%) was the most abundant. Five decomposition stages were recognized, being the active decay the most attractive to colonization by blowflies, except for Lucilia eximia (Wiedemann), which was more abundant in the bloated stage.

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Myiasis by Screw Worm Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae) in a Wild Maned Wolf Chrysocyon brachyurus (Mammalia: Canidae), in Brasília, Brazil

Cited by 8 publications

References 4 publications

Forensic Entomology in Animal Cruelty Cases

Forensic Entomology in Animal Cruelty Cases

First report of myiasis caused by Cochliomyia hominivorax in free-ranging giant otter (Pteronura brasiliensis)

Blowflies (Diptera, Calliphoridae) Associated with Pig Carcasses in a Caatinga Area, Northeastern Brazil

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