The main external parasites that are problematic for poultry are mites and lice. Mite parasites feed on the blood of chickens and can cause anaemia and possible death, while lice feed on dander and feathers. The red mite causes the most problems in poultry.

1. Common parasitic diseases
in poultry
Sachith Sri Mihiraj
BSc (Special), M.Agri

2. Parasites
Internal parasites
 Tape Worm
 Round worm
External Parasites
 Mites
 Fleas
 Lice
Protozoa
 Coccidia
 Histomonas

3. Factors affecting the incidence and
severity of parasitic diseases
 Age
 Season
 System of housing
 Nutrition
 Hygiene and management
 Use of medicaments

4. Parasitic Diseases
 Coccidiosis
 Round Worms Damage
 Tape Worm Damage
 Blackhead Disease
 Red mite Damage

5. Coccidiosis
 Causative agent-: Emeria nectrix
Emeria tenella
 Transmission -: contamination of feces
 Clinical signs-: weight losses
bloody droppings
 Treatment and preventions: anticoccidial chemicals
feed meditation
Coccidiosis vaccination

6. Black head Disease
Yong chicken been most susceptible
 Causative agent-: Protozoan parasite- Histomanas meleagridis
 Transmission-: direct transmission
indirect transmission by infected water,feed,droppings eggs of the ceacal worm

7.  Clinical signs-: Depression
stand or sit with ruffled feathers
yellowish diarrhea
 Treatment and preventions-: protozoan chemotherapeutics
Proper hygiene
Elimination of ceacal worms

8. Round worms Damage
 Causative agent-: Ascaris
 Transmission-: by droppings
worm eggs picked by intermediate hosts
 Clinical signs-: enteritis
anemia
 Treatment and preventions-: treated with piperzine
 To control-: remove backyard flocks
deworming
removing infected litter after each cycle

9. Tape Worms Damage
 Causative agent-: Cestodes
 Transmission-: house fly –mostly affect for birds kept in cages
 Clinical signs-: Poor Growth,Diarrhea
 Control-: no approved medication
controlling the intermediate hosts

10. Red mite Damage
 Causative agent-: Blood sucking mites Dermanyssus
gallinae
 Transmission-:
transport equipment
vaccination crew
rodents
 Clinical signs-: leading to anemia
Irritation and stress
Increase feed intake

11.  Control-: poultry house hygiene
whole flock replacement rather than partial culling
cleaning thoroughly after removing previous flock
avoid bringing in new mites via,
 transport Equipments
 vaccination crew
 rodents

12. Thank you