Incidence Of Myiasis Research Articles

Canine Myiasis and its Causal Agents in India

Myiasis, the invasion of tissues of live humans and vertebrate animals with dipteran larvae is common throughout the tropical regions of the world. It is a real welfare problem of worldwide distribution and a matter of great concern among medical and veterinary fields. The reports indicate that dogs are the most common canine species affected by myiasis. The present study was conducted to ascertain prevalence of myiasis among pet dogs and to identify myiasis-causing flies in India. The study resulted in the identification of three species of myiasis causing flies among pet dogs. The Old World Screw-worm fly- Chrysomya bezziana was reported to be the predominant fly species followed by Musca domestica and Sarcophaga ruficornis. The overall infestation rate was high in rainy season followed by summer, spring, autumn and least in winter. Incidence of myiasis was found to be higher among adult males than the females. The most frequently infested body regions were the face, neck and perianal region among males and face, neck and vulvar lips among females. Most infestations were found in the wounds at front body parts of the adult males, suggesting the common occurrence of myiasis in consequence of competitive fighting.

Incidence of myiasis among humans-a review.

Myiasis, the infestation of tissues of live humans and other vertebrate animals with dipteran larvae (maggots), is a phenomenon of widespread occurrence throughout the tropical regions of the world. It is commonly seen in domestic and wild animals but occurs rarely in man also. The tissue invasion in man by maggots is generally a well-recognized complication of neglected wounds. The condition may be asymptomatic but occasionally results in more or less severe problems and even death when larvae invade body cavities or areas that forbid their direct visual examination. Many cases of myiasis, however, usually do not reach the attention of medical practitioners because of the tendency of the mature larvae to migrate out of the lesion for pupation. In the present study, the authors reviewed the past literature describing the cases of human myiasis, causative fly species and predisposing factors for the onset of the same. The aim of the present manuscript is to provide a database for the future reference of medical entomologists, medical practitioners and veterinarians. Review of literature revealed that 37 fly species belonging to ten families were responsible worldwide for the onset of human myiasis. The incidence of myiasis among humans can be correlated to increasing fly populations, poor hygienic conditions and presence of domestic animals in the close vicinity. Other factors responsible for myiasis include neglected open wounds and foul-smelling discharge from natural body openings. Moreover, ignorance plays a key role in its occurrence since people are generally unaware about the actual cause and often correlate the condition to their superstitious beliefs. It is emphasized that the patients should not neglect their wounds and should take proper medical care; otherwise, myiasis may supervene.

Incidence of Myiasis and bionomics of cyclorrhaphan flies in small ruminants of Jammu

A study was conducted to determine the incidence of myiasis and bionomics of cyclorrhaphan flies in small ruminants of Jammu. Sheep and goats (10 each) having cutaneous wounds were examined monthly (total 240 animals) for the presence/absence of maggots. The incidence of active maggot wound myiasis was 37.1%. The larvae of Lucilia cuprina were recovered from both sheep and goats whereas Calliphora erythrocephala and Phormia spp. larvae were found only in sheep and Hypoderma spp. larvae only in goats. There were marked seasonal fluctuations in the occurrence of infestation rate of maggots with a significantly (P<0.05) maximum incidence (71.7%) in monsoon season. To study the bionomics of cyclorrhaphan flies, meat pieces of sheep and goats were kept in open field as well as in dairy farm. Eight species viz. Lucilia cuprina, Calliphora erythrocephala, Chrysomyia megacephala, Sarcophaga rufifaciens, Phormia regina, Musca domestica and Stomoxys calcitrans of cyclorrhaphan flies were recorded. The study would help to formulate an appropriate control strategy against cutaneous myiasis causing flies and to minimize the perpetuating financial losses to animal owners in the region.

Myiasis Secondary to Dermatobia hominis (Human Botfly) Presenting as a Long-standing Breast Mass

Abstract A case of a 54-year-old woman who presented with a breast mass is reported. Histologically, a chronic granulomatous inflammatory response was observed. The response was associated with an organism diagnosed as a fly larva, Dermatobia hominis (human botfly). The incidence of myiasis, infestation by fly larvae, presenting as a long-standing breast mass and mimicking a neoplasm is extremely rare, especially in the United States.

Myiasis in a Turkey

A case of cutaneous myiasis was reported in a 3.5-month-old turkey. The bird was invaded by a very large number of maggots on its posterior half. The maggots killed the bird and consumed all the flesh within 48 hours. Microscopic examination of the maggots revealed that they belonged to Lucilia sericata (a dipterous fly). The incidence of myiasis in birds was also discussed.