RESEARCH FINDINGS ON ND VACCINATION AND DEWORMING RESEARCH FINDINGS ON ND VACCINATION AND DEWORMING PRESENTED AT THE “ENHANCING CHICKEN PRODUCTIVITY THROUGH.

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RESEARCH FINDINGS ON ND VACCINATION AND DEWORMING RESEARCH FINDINGS ON ND VACCINATION AND DEWORMING PRESENTED AT THE “ENHANCING CHICKEN PRODUCTIVITY THROUGH PARASITE MANAGEMENT FOR EFFECTIVE NEWCASTLE DISEASE VACCINATION IN KENYA – MBEERE STAKEHOLDERS WORKSHOP ON 4 TH DECEMBER 2013” BY DAVID C KEMBOI DEPARTMENT OF VETERINARY PATHOLOGY, MICROBIOLOGY AND PARASITOLOGY UNIVERSITY OF NAIROBI

Newcastle disease (ND) is the most important poultry disease in the world, causing devastating losses in both commercial and village chickens As a viral disease; it can only be effectively controlled through vaccination.

Parasites stress birds through nutrient consumption, blood sucking and irritation; There is a high parasite prevalence levels in chickens of Eastern province (Mbeere) - 90 – 96% (Maina, 2005; Sabuni, 2009) Stress has been reported to cause immunosuppression (Njagi et al., 2010).

Why was the study done? This study was carried out to check on the extent to which these parasites (ecto- and endo-) may suppress immune response to ND vaccination. This was done through monitoring of antibody titers after selective parasite treatments followed by ND vaccination.

5 MATERIAL AND METHODS Study area

6 Agricultural activities practiced

Experimental birds: Seventy two chickens from Mbeere District were used for the study Purchase of chicken from farmers Transport of chicken to Kabete for the experiment

Fig 2: Round worm Fig 3: Lice Fig 4: Coccidia Fig 1: Tape worms Findings from examination of the birds

Table 1: Experimental chicken groups, showing parasite and coccidia treatments and Newcastle Disease vaccination Group of chicken Number of chicken in a group Endoparasites treatment Ectoparasites treatment Newcastle Disease vaccination Coccidia treatment 18---Tolrazuril (Intracox) 28Albendazole--Tolrazuril (Intracox) 38Sevin+permethrin-Tolrazuril (Intracox) 48AlbendazoleSevin+permethrin-Tolrazuril (Intracox) 58Albendazole-+Tolrazuril (Intracox) 68-Sevin+permethrin+Tolrazuril (Intracox) 78AlbendazoleSevin+permethrin+Tolrazuril (Intracox)

Fig 2: AVIVAX-F Vaccine Fig 3: Drugs used for treatment Fig 4: Investigator performing hemagglutination inhibition test Fig 1: Experimental chickens in cages, University of Nairobi.

Examination and identification of the parasites Endo- parasites were physically examined Ectoparasites were examined physically Blood was collected from the birds on weekly basis for six weeks and serum tested using Hemagglutination inhibition

RESULTS

Endoparasites treatment

ND protection for vaccinated and non vaccinated groups

Total parasite control vs partial parasite control

Conclusion This study has shown that parasite control results in improved immune response to ND vaccination by the village chicken Ecto- or endo-parasites combined treatments gives better immunity level to NDV than treatment of ecto-parasites or endo-parasites alone. Albendazole at a dosage of 20mg/kg bwt is both safe and efficient for helminth treatment (except Gonngylonema inguivicola)

Acknowledgment The authors would like to thank: Technical Assistance of : J.K. Kibe, Mary Mutune R.O. Otieno, The poultry farmers of Mbeere for their corporation, University of Nairobi and RUFORUM for their sponsorship and funding of the project

THANK YOU