This document contains descriptions of lesions observed in various organs of poultry and other birds, along with the suspected diseases. Examples include nervous signs in a baby chick suspected to be due to avian encephalomyelitis or vitamin E deficiency, and congestion in the brain of a chicken suspected to be due to Newcastle disease. Wart-like nodules on the head of chickens and pigeons are described as being characteristic of the dry form of fowlpox and pigeonpox respectively.

3. ORGAN : Baby Chick
LESIONS : Nervous manifestation
SUSP.DIS. : AE or ND or Vit. E. Def.

4. ORGAN : Brain of chicken
LESIONS : Congestion
SUSP. DIS. : ND

5. ORGAN : Head of chicken
LESIONS : Conjunctivitis
SUSP. DIS. : V V ND

7. ORGAN : Proventriculus and gizzard
LESIONS : Peticeal hemorrhages on
proventricular gland.
SUSP. DIS. : ND

8. ORGAN : Proventriculus and gizzard
LESIONS : Peticeal hemorrhages on
proventricular gland.
SUSP. DIS. : ND

10. ORGAN : Ovary
LESIONS : Congested and Flaccid Ova
SUSP. DIS. : ND

12. ORGAN : Head of chicken
LESIONS : Swelling and cyanosis of comb &
wattle
SUSP. DIS.: Avian influenza (AI)

14. ORGAN : Leg of chicken
LESIONS : Hemorrhage in sub cut tissues

15. ORGAN : Chest cavity
LESIONS : Peticheal hemorrhages in coronary fat
SUSP. DIS.: AI Or VV ND

17. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Adult chicken
LESIONS : Extended head and neck (dyspnea)
SUSP.DIS. : ILT

18. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Trachea
LESIONS : Hemorrhagic trachities
SUSP.DIS. : ILT

19. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Trachea
LESIONS : Hemorrhagic tracheities
SUSP.DIS. : ILT

20. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Trachea
LESIONS : Caseous trachitis mixed with blood
SUSP.DIS. : ILT

21. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Trachea
LESIONS : Acute tracheitis
SUSP.DIS. : ILT , IB

23. Pale shelled compared with normal eggs
SUSP.DIS. : EDS or ND

24. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Egg
LESIONS : Rough-shell egg
SUSP.DIS. : IB

25. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Eggs
LESIONS : Abnormal shell quality
SUSP.DIS.: IB or EDS or ND

26. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Egg content
LESIONS : Watery albumin
SUSP.DIS. : IB

27. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Chest cavity
LESIONS : Caseous plugs in the syrinx
SUSP.DIS. : IB

28. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Trachea
LESIONS : Caseous Plugs
SUSP.DIS. : IB

29. ORGAN : Trachea
LESIONS : Caseated material
SUSP.DIS.: IB or ILT or ND

31. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Neck of bird
LESIONS : Thymus atrophy
SUSP. DIS. : CIA

32. ORGAN : Opened long bone
LESIONS : Pale gelatinous bone marrow

33. ORGAN :
LESIONS :
SUSP.DIS. :
Atrophied (bottom) and normal (top) size
thymus gland
SUSP.DIS. : CIA

35. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Pelvic Cavity
LESIONS : Bursal pathological changes
SUSP. DIS.: IBD

36. ORGAN :
LESIONS :
SUSP.DIS. :
AN : Pelvic Cavity
ONS : Hemorrhagic bursitis & nephrosis
DIS : Infectious bursal disease (IBD)

37. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Pelvic cavity
LESIONS : Purulent exudates in bursa
SUSP. DIS. : IBD

38. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Bursa of Fabricuis
LESIONS : Hemorrhagic bursitis
SUSP. DIS.: IBD

39. ORGAN : Thigh muscle
LESIONS : Hemorrhage
SUSP. DIS.: IBD or CIA

41. ORGAN : Pelvic cavity
LESIONS : Enlarged pale liver with subcapsular
Hemorrhages
SUSP. DIS. : IBH

42. ORGAN : Liver
LESIONS : Sub Capsular Hemorrhages
SUSP.DIS. : IBH

43. ORGAN : Spleen
LESIONS : Enlarged and mottled
SUSP.DIS. : Avian Adeno Virus Infection

44. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Intestine of Turkey
LESIONS : Distended and congested
intestine filled with hemorrhage
SUSP.DIS.: Turkey Hemorrhagic Enteritis

45. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Small intestine of Turkey
LESIONS : Hemorrhage and mucosal debris
SUSP.DIS. : Turkey Hemorrhagic Enteritis

47. ORGAN : Chickens
LESIONS : Abnormal growth performance
SUSP.DIS. : Mal absorption syndrome (REO)

49. ORGAN : Chickens
LESIONS : Mal feathering
SUSP.DIS. : Mal-absorption syndrome (REO)

50. ORGAN : Chicken
LESIONS : Enlargment of proventriculus
SUSP.DIS. : REO

51. ORGAN : Leg of bird
LESIONS : Arthritis
SUSP.DIS. : Viral Arthritis (REO)

52. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Duodenum
LESIONS : Pancreatic atrophy (bottom)
SUSP.DIS. : REO

53. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Opened small intestine
LESIONS : Undigested food
SUSP. DIS. : REO

54. ORGAN : Hock joint
LESIONS : Ruptured of gastrochnamious tendon
SUSP.DIS. : Viral Arthritis (tenosynovitis)

55. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Gastroecnemius tendon
LESIONS : Rupture of gastroecnemius tendon
SUSP.DIS. : Viral arthritis (REO)

56. ORGAN : Chicken embryo
LESIONS : liver necrosis & greenish
discoloration
SUSP.DIS. : REO

58. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Chicken
LESIONS : Paralysis of the left Leg
SUSP.DIS. : Marek’s diseases

59. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Chest cavity
LESIONS : Unilateral enlargement of brachial
plexus ( Left one)
SUSP.DIS. : Marek’s Disease

60. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Eyes of chickens
LESIONS : Abnormal pigmentation with iris
irregularity
SUSP.DIS. : Marek’s Disease (Eye Form)

61. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Skin of chicken
LESIONS : Tumor of the feather follicle
SUSP. DIS. : Marek’s disease

62. ORGAN : Skin of chicken
LESIONS : Tumor of the feather follicle
SUSP.DIS. : Marek’s disease

63. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Parenchymatous organs
LESIONS : Hemorrhage and rupture of spleen
SUSP.DIS. : Tumor viruses (ALC, MD, RE)

64. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Liver
LESIONS : Diffuse Enlargement
SUSP.DIS. : Tumor viruses (ALC, MD, RE)

65. ORGAN : Pelvic cavity
LESIONS : Nodular enlargement of liver
SUSP.DIS. : Tumor viruses (ALC, MD , REV)

66. ORGAN : Pelvic cavity
LESIONS : Diffuse enlargement of kidney
SUSP.DIS. : Tumor viruses (ALC, MD & REV)

67. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Bursa and liver
LESIONS : Nodular enlargement of liver with
persistence of Bursa of Fabricius
SUSP.DIS. : ALC

68. ORGAN : Pelvic cavity
LESIONS : Diffuse enlargement of liver
SUSP.DIS. : Erythro-blastosis

69. ORGAN : Liver and heart
LESIONS : Diffuse enlargement
SUSP.DIS. : Lymphoproleferative diseas

70. ORGAN : Spleen
LESIONS : Pale foccal nodule
SUSP.DIS. : Lymphoproleferative disease

71. ORGAN : Cross section of long bone
LESIONS : Increase in thickness of bone
SUSP. DIS. : Osteo-petrosis

73. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Head of chicken
LESIONS : Wart like nodules
SUSP.DIS. : Dry form of fowl pox

74. ORGAN : Head of chicken
LESIONS : Wart like nodules
SUSP. DIS. : Dry form of fowl pox

75. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Buccal cavity
LESIONS : Diphtheretic lesions
SUSP. DIS. : Wet form of fowl pox

76. ORGAN : Legs of chicken
LESIONS : Wart like nodules
SUSP.DIS. : Dry form of fowl pox

77. ORGAN : Head of chicken
LESIONS : Wart like nodules
SUSP.DIS. : Dry form of fowl pox

78. ORGAN : Head of pigeon
LESIONS : Wart like nodules and diphtheretic
membrane in the buccal cavity
SUSP.DIS. : Mixed form of pigeon pox

79. ORGAN : Head of pigeon
LESIONS: Diphtheretic lesions in the buccal cavity
SUSP. DIS: Wet form of pox

80. ORGAN : Leg of pigeon
LESIONS : Nodule on ankle Joint
SUSP.DIS. : Dry form of pigeon Pox

81. ORGAN : Feather follicle
LESIONS : Scattered raised spots 5-D post vaccine
SUSP.DIS. : Pox vaccinal takes

84. ORGAN : Small intestine
LESIONS : Necrosis & sloughing of intestinal
mucosa
SUSP.DIS. : DVE

85. ORGAN : Intestine of duck
LESIONS : Congestion of annular fold
SUSP. DIS. : DVE

86. ORGAN : Liver and spleen of duck
LESIONS : Congestion and necrosis
SUSP. DIS. : DVE

87. ORGAN : Heart of duck
LESIONS : Congestion with peteceal hemorrhages
SUSP. DIS. : DVE

88. ORGAN : Embryos of duck
LESIONS : Congested (left)
SUSP. DIS. : DVH

90. ORGAN : Duckling
LESIONS : Nervous signs
SUSP.DIS. : DVH

91. ORGAN : Pelvic cavity
LESIONS : Subcapsular hemorrhages in liver
SUSP.DIS. : DVH

92. Organ: Duck
Lesion: Lamness, Runting & mal-featnering
Susp. Dis: Derzzy

93. ORGAN : Pigeon
LESIONS : Nervous signs
SUSP.DIS. : Paramyxo virus or paratyphoid

95. Different stages of nervous signs in pigeon
SUSP. DIS. : Paramyxo-virus infection

96. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Head of poult
LESIONS : Sinusitis with mucoid exudate.
SUSP.DIS. : TRT

97. ORGAN :
LESIONS :
SUSP.DIS. :
ORGAN : Head of chicken
LESIONS : Purulent subcutenous exudate
SUSP.DIS. : Swollen head syndrome

98. Organ : Rabbit
Lesion: Errythyma & ulcers in nostril and eye-lid
Susp. Dis. Myxoma virus Infection

99. Organ : Rabbit
Lesion: Tumor formation in eye-lid
Susp. Dis. Fibroma virus Infection