This document describes a case of maggot infestation in a male dog. Maggots were seen on the lateral side of the dog's left thigh. The maggots were manually removed after applying Topicure Spray. The dog was given injections of HITEK, Monocef, and Melonex for 3 days to treat the infestation and prevent spread. Maggot infestation, also called myiasis, is caused by fly larvae feeding on live or dead tissue. Primary flies can initiate myiasis while secondary flies extend existing lesions. Treatment involves removal of maggots and use of insecticides, antiseptics, and fly repellents.

1. MAGGOT INFESTATION IN A DOG
SAYAR AHMAD BEIGH

2. CASE
• OPD No. –1566 date : 13/10/14
 SPECIES –Canine
 SEX – Male
 HISTORY
 Maggot wound infestation on lateral side of left thigh.
 On examination maggots were seen on the affected area.

3. DIAGNOSIS- MAGGOT INFESTATION
TREATMENT
 Maggots were removed manually after Topicure Spray
 Inj.HITEK-0.6ml S/C (single dose)
dose rate-10mg/50kg bwt
 Inj. Monocef - 500 mg O.D I.M. for 3days
dose rate-15-25mg/kg bwt.
 Inj. Melonex-0.75 ml o.d. i.m. for 3 days
dose rate-0.5mg/kg bwt.

4. MAGGOT INFESTATION(MYIASIS)
 SYNONYMS
 Myiasis
 Fly strike
 Blow fly strike
 DEFINITION
 The invasion of organs and tissues of animals with dipterous
larvae, which for at least a period feed upon the living or dead
tissue of the host
 Larvae are called as maggots
 There is no role of adult fly in myiasis ,only larval stages are
responsible.

5. CLASSIFICATION OF MYIASIS
 ACCORDING TO
 Type
 Clinical presentation
 Species
 BY TYPE
 Obligate-fly is unable to complete lifecycle without
host.eg oestrous ovis
 Facultative-fly complete lifecycle without host caused
by calliphorid flies.
 Accidental-fly larvae feed on host not of usual source.

6. CLASSIFICATION [CONT.]
 BY CLINICAL PRESENTATION
 Cutaneous-caused by blow flies
 Nasal-caused by oestrous ovis.
 Visceral or somatic-caused by hypoderma & gastrophillus.
 Wound (traumatic myiasis)-maggot infestation of wound or
ulcers.
 BY SPECIES CAUSING IT
 Primary myiasis
 Secondary myiasis

7.  PRIMARY MYIASIS
 Primary flies have capability
to initiate myiasis
 Flies deposit eggs on the edges of
abrasions and small wounds.
 Flies have habbit of breeding only
in wounds.
 Maggots hatching out from the eggs burrow
deep into tissues and enlarges the wound cavity.
 Maggots of primary flies feed on living tissues.
 Larva causes laceration of skin and produce
proteolytic enzymes which causes liquifaction
of host tissue

8.  PRIMARY MYIASIS CAUSING FLIES ARE-
 Lucilia cuprina(green bottle fly,copper bottle fly)
 Lucilia sericata
 Calliphora erythrocephala & c.vomitoria(blue
bottle fly)
 Phormia terrae novae
 Phormia regima(black bottle fly)

9. •SECONDARY MYIASIS
 Larvae of secondary flies have capabilty to extend
and deepen the lesions.
 Formation of great lesions.
 Larvae are active and require protein for their
growth.
 They attack on the fleshy part of the body.

10.  SECONDARY MYIASIS FLIES ARE-
 Chrysomia bezziana & c.chloropyga(bluish green bottle
fly)
 Sarcophaga haemorrhoidalis( flesh fly)

11. LIFE CYCLE
Flies lay their eggs on the body surface
Hatching of eggs in one day
larvae(drops on soil)
6days
pupa
(8-21 days,depending on temp.)
adult fly
 NOTE-average time to complete life cycle is 21 days

13. FACTORS EFFECTING PREVALENCE OF
MYIASIS
Climatic factor
temperature rainfall humidity
 temp should be 30-35oC with suitable high relative
humidity.so flies are found in late winter/start of
summer/end of rainy seasons(feb-april,oct-nov)
 Heavy rainfall decreases their no.
 Flies also present in winter but their life cycle is
prolonged.

14. CLINICAL SIGNS
 Animal becomes anorectic and deblitate.
 If condition is present on anterior part of the body then
there is attempt to bite.
 Wagging of tail.
 If lesions present on hind quarter then they stamp their
feet on ground.
 Lesions cause great irritation to animal

16. PROGNOSIS
 PRIMARY MYIASIS
 Without treatment for 2weeks or more can cause death of
the animal in seasons when flies are numerous due to
repeated and intensive infestations.
 Wounds treated within 4days after infestation usually
recover though it may take about month.
 SECONDARY MYIASIS
 Easily responds to treatment.

17. TREATMENT
 Maggots that are superficial are removed with the
forceps and a gauze dipped in chloroform,terpentine or
camphor in oil,is allowed to remain in wound for about 24
hours .gauze is removed and by that time most of the
maggots are killed.remove using forceps and repeat if
maggots are not completely removed.
 Better idea to use patent preparations
like LORAXANE which
contains insecticide.
 Loraxane plus antiseptic
proflavine is used

18. CONTD.
 Herbal sprays like TOPICURE is used which
has fly repellent properties.
COMPOSITION-tailaparna oil,devadarna oil,karanja
oil,tulsi oil,sarala oil,curcumin(colouring agent).
• HIMAX –broad spectrum skin ointment which
is antiseptic and fly repellant.

19. CONT.
 Paste of fresh anona leaves which is claimed
to Be fly repellent and antiseptic is used
alternatively.
 A single subcutaneous injection of IVERMECTIN(brand name-IVOMAC) is
effective
-Available as 10 mg/ml solution
-dose
dog,cattle,goat,sheep-1ml/50 kg bw subcut.