Metallic flies

1.

METALLIC FLIES.
Medical Academy named after S.I. Georgievsky
of Vernadsky CFU.
Department of MEDICAL biology.
Under the guidance. of :- Ph.D. SVETLANA SMIRNOVA
PRESENTED BY:- FAIZAN KHURSHID.
GROUP :- 193 A

2.

INTRODUCTION.
The
common green bottle fly is a
blowfly found in most areas of the
world and is the most well-known
of the numerous green bottle fly
species. Its body is 10–14
millimeters in length – slightly
larger than a house fly – and has
brilliant, metallic, blue-green or
golden coloration with black
markings.

3.

CLASSIFICATION.

4.

GEOGRAPHICAL DISTRIBUTION.

5.

MORPHOLOGY.
Adults: The adults are usually a metallic green and can also have a
copper green color. The mouthparts are usually yellow (Apperson et
al. 2011). The back is hairy and the overall diameter is about 8–10
mm. The squamae at the base of the wings are hairless

6.

Eggs: The eggs of L. sericata are usually white, but can be a pale
yellow. They are often deposited in batches or masses. The eggs are
elongated with one end tapered slightly, and are approximately 1.5
mm long

7.

Pupae: The pupae are enclosed in a hardened shell that
is usually reddish brown, light brown or black in color. This
shell is comprised of the last larval instar skin. They are 9–
10 mm long with a width ranging from 3 to 4 mm

8.

LIFE CYCLE.
The Life cycle of Lucilia sericata consists of four stages that include adult, egg,
larva, and pupa. Each female can lay 2000-3000 eggs in 9-10 batches within only 3
weeks! ... Maggots then hatch from the eggs and attach themselves to an
organism that it is on. After about 4-9 days the maggots are done with
development.
Maggots then hatch from the eggs and attach themselves to an organism that it is
on. After about 4-9 days the maggots are done with development.
The maggots will then go into a pre-pupa stage where they will burrow themselves
into soil and then pupate into a pupa.
In this stage, the maggot is encompassed in a hardened shell where it will molt
and gain wings. They are motionless, do not eat, and cannot protect themselves.
An average pupa stage will last about 7 days. Some flies can stay in the pupa
stage for up to 115 days because of low soil temperatures.

9.

Continue………
Adult flies will then escape from their pupa and journey above the surface of the
soil
At first the fly will be soft and not contain its bright green color. It will take the
body of the fly 48 hours to harden, which it will then display, color and finally
have fully functional wings. Mating activity will then occur anywhere from 3-8
days after emergence. Then the life cycle will start all over again!

10.

11.

SOME FILTHY FACTS ABOUT IT:-

12.

Disease caused by them…..
Semi-specific myiasis:
also called facultative/opportunistic. They are not normally
parasitic, but will do so if the opportunity arises, particularly if
facilitated by wounds/sores already present. They can, however,
develop without the host
These also include species that normally lay eggs in animal or
vegetable matter (transmission that ingesting contaminated food)
The most notable of the semispecific is probably the green-bottle
fly, Lucilia

13.

Some of the photos shown here to
describe the disease.

14.

Geograpical distribution of disease.

15.

DIAGNOSES.
Diagnosis is typically made by identification of fly larvae
or maggots.
CBC count may show leukocytosis and eosinophilia.
LARVAL PRESERVATION AND IDENTIFICATION
Blood examination
Finding larva in tissues.

16.

TREATMENT:
Applies once an infestation is established. In many circles the
first response to cutaneous myiasis once the breathing hole
has formed, is to cover the air hole thickly with petroleum
jelly.
Lack of oxygen then forces the larva to the surface, where it
can more easily be dealt with.
A clinical or veterinary setting there may not be time for
such tentative approaches, and the treatment of choice might
be more direct, with or without an incision.
First the larva must be eliminated through pressure around
the lesion and the use of forceps. Secondly the wound must be
cleaned and disinfected. Further control is necessary to avoid
further reinfestation.

17.

SymptomS….
myiasis affects the human body depends on where the larvae are
located.
Larvae may infect dead, necrotic (prematurely dying) or living tissue
in various sites: the skin, eyes, ears, stomach and intestinal tract, or in
genitourinary sites.
They may invade open wounds and lesions or unbroken skin. Some
enter the body through the nose or ears.
Larvae or eggs can reach the stomach or intestines if they are
swallowed with food and cause gastric or intestinal myiasis
Crawling sensations and buzzing noises. Smelly discharge is
sometimes present. If located in the middle ear, larvae may get to
the brain.

18.

PREVENTION AND CONTROL:
The first control method is preventive and aims to eradicate
the adult flies before they can cause any damage and is
called vector control. The second control method is the
treatment once the infestation is present, and concerns the
infected animals (including humans).
One prevention method involves removing the environment
most favorable to the flies, such as by removal of the tail.
Another example is the crutching of sheep, which involves the
removal of wool from around the tail and between the rear
legs, which is a favorable environment for the larvae.

19.

PREVENTION AND CONTROL:-
To prevent myiasis in humans, there is a need for
general improvement of sanitation,
personal hygiene,
and extermination of the flies by insecticides.
Clothes should be washed thoroughly, preferably in hot water,
dried away from flies, and ironed thoroughly.
The heat of the iron kills the eggs of myiasis-causing flies

20.

SOME LINKS FOR BETTER UNDERSTANDING…..
https://www.youtube.com/watch?v=39-kK0Uj4c4
https://www.youtube.com/watch?v=msraFceTXyE
https://www.youtube.com/watch?v=NsX9zod_RXA

21.

HAVE A NICE DAY…….
FAIZAN KHURSHID
GROUP-193 A