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EFFECTS OF DIFFERENCE TIMING OF ROUTINE VACCINATION SCHEDULES ON GROWTH PERFORMANCE, MORTALITY RATE AND BLOOD PARAMETERS OF BROILERS

Animal Science Project Topics & Materials

TABLE OF CONTENTS

Title page———————————————————————— —- i

Certification ——————————————————————– —- ii

Dedication ———————————————————————- —- iii

Acknowledgment————————————————————— —- iv

Table of Contents ————————————————————— —- v

List of Tables ——————————————————————- —- vii

Abstract  ———————————————————————— —- viii

CHAPTER ONE: INTODUCTION

1.1 Background of the Study ————————————————— —- 1

1.2 Objectives of the Study—————————————————– —- 4

  • Justification—————————————————————– —- 4

 

CHAPTER TWO: LITERATURE REVIEW

2.1 Some Common Diseases of Poultry.—————————————- —- 6

2.1.1 New Castle Disease:——————————————————- —- 6

2.1.2 Infectious Bursal Disease (Gumboro Disease):————————— —- 9

2.1.3 Fowl Pox—————————————————————— —- 11

2.2 Vaccines and Vaccination————————————————— —- 12

2.3 The Importance of Vaccination——————————————— —- 13

2.4 Deciding Whether or not to Vaccinate ————————————- —- 14

2.5 Types of Vaccines: ———————————————————- —- 15

2.6 Administration————————————————————– —- 16

2.7 Types of Vaccination Programmes—————————————— —- 18

2.8 Tips For Successful Vaccination ——————————————– —- 20

2.9 Vaccine Distribution——————————————————– —- 21

2.10 Factors Which Interfere With Vaccine Efficacy————————– —- 21

 

CHAPTER THREE: MATERIALS AND METHODS

3.1 Location and Duration of the Study————————————— —- 25

3.2   The Experimental Animals.———————————————— —- 25

3.3 General sanitation and Health measures———————————— —- 26

3.4 Experimental Design:——————————————————– —- 26

3.5 Data Collection Analysis—————————————————- —- 27

3.6 Analysis of Data————————————————————- —- 31

CHAPTER FOUR

 Results————————————————————————– —- 32

CHAPTER FIVE

 Discussion———————————————————————- —- 37

CHAPTER SIX

Summary Conclusion and Recommendation———————————— —- 39

References———————————————————————– —- 41

Appendices

LIST OF TABLES

 

Table 1: The vaccination programme for common diseases of poultry…………………. 19

Table 2: The day of vaccination and the treatments used………………………………….. 20

Table 3: Weekly live body weight of broiler subjected to varying vaccination

Schedule………………………………………………………………………………………….. 32

Table 4: Mean of daily live weight gain of broilers subjected varying vaccination

Schedule………………………………………………………………………………………….. 33

Table 5: Weekly shank length of broilers subjected to varying vaccination

Schedule………………………………………………………………………………………….. 34

Table 6: Mean daily shank length gain of broilers subjected to varying

vaccination schedule………………………………………………………………………….. 35

Table 7: Mortality rates of broilers subjected to different vaccination schedule……. 35

Table 8: Mean values for blood parameters of broilers subjected to different

vaccination schedules…………………………………………………………………………………… 36

 

ABSTRACT

This study was conducted to find the effect of the delayed routine vaccination schedules on growth performance, blood parameters and immunity levels of broilers reared in a humid tropical part of Nigeria. A total of 90 broiler chickens were procured and sorted  into three treatments (control, 1 week delay in vaccination and 2 weeks delay in vaccination). The results showed significant differences (P < 0.05) in all growth parameters studied with lower values for broilers with delayed vaccination schedules (Treatment 2 and 3). Shank length and gains in shank length were not significantly (P>0.05) affected by delayed vaccination schedule. The blood parameters (PCV and WBC) values were significantly (P<0.01) lower in birds whose vaccination schedule was delayed for two weeks, (Treatment 3) compared to other treatments while immunity levels were significantly (P<0.01) lower in Treatment 3 compared to Treatments 2 and 1 respectively. It was concluded that delayed vaccination schedule of up to two weeks considerably affected growth performance and immunity status of broilers.

 

 

CHAPTER ONE

INTRODUCTION

1.1 Background of the study                                                                              

The poultry industry in Nigeria is characterized by a mixture of backyard, peasant, household-oriented and modern large scale poultry farms which dot our country side and urban centres today. It can be said that poultry keeping has become a business in Nigeria since Poultry is now kept by practically every household in Nigeria especially in rural communities (Obioha 1992). Broilers are meat type chickens that reach market size at about 8-10 weeks of age. Nearly 80% of all commercial chicks hatched in Nigeria are broilers (Bundy et al 1975).

Poultry occupies a unique position in Nigeria animal production programme for several reasons. The most important of these is the fact that poultry are relatively free from the many pathological, ecological and economic constraints which affect the commercial production of other breeds and classes of livestock in Nigeria (Obioha 1992). The occurrence of disease in a poultry flock is a serious event and one that causes a lot of anxiety to a poultry farmer due to the fact that most commercial poultry are reared intensively with a large number of birds occuping a relative small area, a disease can spread rapidly among the whole flock causing a high level of mortality and huge financial loss to the farmer. The prevention of disease therefore is a decisive factor to the success or failure of a poultry enterprise. Diseases of poultry can be caused by four major factors namely: pathogens, poor management, deficiency of nutrients and metabolic disorders. Most poultry diseases are brought about by the presence of one or more pathogens or causative organisms. These organisms are always present in any poultry environment but they attain a virulent stage when the resistance of the chicken is low due to internal or external stress. The stress condition may be created by mismanagement, transportation, handling, internal parasite or even excessive excitement (Obioha 1992). The infectious organism may also gain easy access to the tissue of the birds following wound that may be cause by cannibalism. Some of the common sources of stress are lack of feed and water, poor ventilation, inadequate floor space, poor sanitation, high internal and external parasitic load, extremes of weather, vaccination failure, sudden changes in feed or environment, pests, flies, ants, nutritional deficiencies etc.

Apart from encouraging the invasion of pathogens, bad management may cause disease directly. Examples of bad management are over crowding, poor ventilation, failure to vaccinate at the right time, failure to remove dead birds promptly, failure to remove droppings regularly leading to accumulation of ammonia and breeding site of pathogens and parasites, cannibalism, uncontrolled access of visitors to poultry farms and absence of  disinfectant troughs or dips.

 

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