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9th International Symposium on Avian Influenza


New with the March 2014 issue of Avian Diseases: You can read your issue of Avian Diseases on your favorite Reader (iPad, Kindle and more). Look online for ePub or Mobi files under "Supplemental Material" to download onto your device. Available for AAAP Members and Avian Diseases subscribers.


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USDA ARS Postdoctoral Program


Gift A Chicken Project, coordinated by Arizona State University, provides rural Ugandan families with flocks of special, hybrid chickens that will guarantee the families better nutrition and a sustainable source of income.

Congratulations to Dr. Jagdev Sharma, & Dr. Sylvia Lemus Sharma.

Learn More here.


Avian Health Online™
is a specialist and interactive online course for veterinarians working in the general poultry industry worldwide.

Presented by
University of Melbourne
and the
Poultry Disease Research Center, UGA, USA


Avian Pathology Continuing Education Materials Available On-Line

A collection of over 600 virtual slides of avian histopathology cases with a reduced rate for AAAP Members

Provided by
Dr. Oscar Fletcher

Available through the Continuing Education office in the College of Veterinary Medicine at NC State


FAQ on Tumor virus Diseases

Prepared by AAAP Tumor Virus Committee 2012
Posted 1/22/2013


Commentary from CAST available: The Direct Relationship between Animal Health and Food Safety Outcomes


Interview with
Dr. Julius Fabricant
One of AAAP's founding members


AVMA


Keep our Food Safe


Frequently Asked Questions about Antimicrobial Use and Antimcrobial Resistance


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AAAP Slide Study Set Modules

  Available as pdf downloads

Continuing Education Program.

These Slide Study Sets are produced and distributed by the American Association of Avian Pathologist (AAAP).

Reproduction is prohibited without permission. Images may be used for educational purposes as long as credit is
given to AAAP.  These Slide Sets have been produced and updated through the leadership of the AAAP Education 
and Electronic Information Committees and the generous contributions of the slide study set authors.

 

  • Current Slide Sets  (See Below) $20.00 each                  AAAP Slide Study Set Order Form
    (AAAP Members login to receive 10% discount)

 

ASPERGILLOSIS  1995       INFECTIOUS CORYZA    1983
AVIAN CARDIOVASCULAR SYSTEM 2010       INFECTIOUS LARYNGOTRACHEITIS    2011
AVIAN ENCEPHALOMYELITIS 2011       MARBLE SPLEEN DISEASE RING-NECKED PHEASANTS    1992
AVIAN INFLUENZA 2011       MAREK'S DISEASE    2005
AVIAN POX 1986       MUSCULOSKELETAL DISORDERS CHICKENS &TURKEYS    2010
CHICKEN INFECTIOUS ANEMIA 1994       MYCOPLASMA GALLISEPTICUM INFECTION    2007
CLOSTRIDIAL DISEASES  2013       MYCOPLASMA MELEAGRIDIS INFECTION    1983
COCCIDIOSIS IN CHICKENS AND TURKEYS 1997       MYCOPLASMA SYNOVIAE INFECTION    2012
DIFFERENTIAL DIAGNOSIS OF LYMPHOID AND MYELOID TUMORS 2005       NECROTIC ENTERITIS    2012
EMERGING AND EPIDEMIC DISEASES OF WILD BIRDS 2007       PULLORUM DISEASE AND FOWL TYPHOID    1996
FOWL CHOLERA 1995       RNA TUMOR VIRUSES  2009
GROSS LESIONS OF VELOGENIC VISCEROTROPIC NEWCASTLE DIS 1973     SYSTEMIC VIRAL DISEASES OF PET BIRDS  1995
HISTOMONIASIS 2012       VIRAL ARTHRITIS 1975
INCLUSION BODY HEPATITIS OF CHICKENS 1973      AN OVERVIEW OF EXOTIC NEWCASTLE DISEASE  2013
INFECTIOUS BURSAL DISEASE 1985      


 * Disponible en Español e Inglés

 

alt

ASPERGILLOSIS alt (Slide study set # 9) *

Aspergillosis is the most common respiratory mycotic disease of poultry.
Aspergillosis is defined as any disease condition caused by a member of
the fungal genus Aspergillus. 


F. Merrill Ranck, Jr
1978
Revised by
Andrea M. Miles
1995

Slide 12

THE AVIAN CARDIOVASCULAR SYSTEM alt (Slide study set # 25A)

The avian heart differs from the mammalian heart in that it is cone-shaped,
has a thin right ventricle (RV) and thick left ventricular (LV) wall, with a thickness
ratio
 of 1:4. A muscular flap, rather than a mammalian valve, separates the
right atrium (RA)
from the RV. This muscular flap is a continuation of muscle
from the right ventricular
 wall. Other valves are similar to those found in
the mammalian heart.


alt
Richard J. Julian
2010

alt

AVIAN ENCEPHALOMYELITISalt (Slide study set # 5A)

Avian encephalomyelitis (AE) is an infectious viral disease of young
(1 to 3 week old)chickens, turkeys, pheasants, and quail. The causative
virus is a member of the Picornaviridae family. Older chickens may have
cataracts as a consequence of AE infection.Susceptible laying hens can
have reduction in egg production and hatchability. Because the virus
can be transmitted through the egg, immunization of hens is critical
for control of this disease. 

 

alt
O. J. Fletcher
T. Abdul-Aziz
2011

Turkey ovary with atretic and congested follicles

AVIAN INFLUENZA  alt (Slide study set # 31)

AI is an infections, viral disease of birds caused by several subtypes of the type A
strain of the influenza virus.  The virus occurs natuarally among waterfowl and
shorebirds which remain asymtomatic but may transmit the virus to domestic
poultry such as chickens, turkeys, and ducks.

 

alt
N. L. Tablanta
H. L. Shivaprasad
2011

Slide 18

AVIAN POX  alt (Slide study set # 16) *

Avian poxviruses--fowl, pigeon, turkey, canary, junco, quail, sparrow, and
psittacine poxviruses--are members of the genus Avipoxvirus of the
Poxviridae family. Fowl poxvirus is the type species of the genus. Because
of similar clinical manifestation in different avian species, only fowl pox is
described here.  
 

 

alt
D. N. Tripathy
1986

Slide 3

CHICKEN INFECTIOUS ANEMIA  alt (Slide study set # 20) *

Chicken infectious anemia (CIA) is a disease characterized by aplastic anemia,
generalized lymphoid depletion, subcutaneous and intramuscular hemorrhages,
and immunodepression. Because of the immunodepression, increased mortality
due to secondary complications is often observed.

 

alt
H. L. Shivaprasad
B. Lucio
1994

alt

CLOSTRIDIAL DISEASES alt (Slide study set #34)

Clostridia are spore-forming Gram positive bacilli that can cause
various diseases with different clinical signs in poultry, ratites, psittacines,
waterfowl, and wild birds. Many Clostridia can be found normally in the soil
and in the gastrointestinal tract of many animals. All Clostridia produce a
vast array of exotoxins.

alt
H. L. Shivaprasad
N. L. Tablante
2013

Slide 2

COCCIDIOSIS IN CHICKENS AND TURKEYS  alt(Slide study set # 7) *

The coccidia are in the phylum Apicomplexa and may be grouped into
numerousgenera consisting of more than a thousand species;
however, this discussion will berestricted to the genus Eimeria,
which infects chickens and turkeys.

 

alt
Kevin L. Watkins
Ken Opengart
1997 

Slide 8

DIFFERENTIAL DIAGNOSIS OF LYMPHOID AND MYELOID TUMORS
IN THE CHICKEN alt
 (Slide study set # 27)

This documentation and slide study set is to provide a conceptual basis for the
differential diagnosis of lymphoid and myeloid tumors in chickens and may also
serve as a teaching aid.  It is directed primarily to the academician although
students and field veterinarians should also find the information useful. 
No attempt is made to illustrate all lesions associated with tumor virus infection
in chickens as this is considered in other slide sets.

 

alt
R. L. Witter
I. M. Gimeno
A. M. Fadly
2005

Slide 25

EMERGING AND EPIDEMIC DISEASES OF WILD BIRDS  alt
(Slide study set # 28)

While most of the American Association of Avian Pathologists study sets are
devoted to descriptions of disease conditions in domestic poultry, this study
set will describe diseases of wild birds.  Diseases of wild birds are important not
only in their relation to the health of wild bird populations, but also because
they represent important endemic infectious agents which pose threats to
both poultry and in some cases human health.

 

alt
Scott D. Fitzgerald
John R. Fisher
Nicole L. Gottdenker
2007

Slide 14

FOWL CHOLERA alt (Slide study set # 19) *

Fowl cholera is a septicemic disease caused by Pasteurella multocida which
affects a variety of domesticated and wild birds. This highly contagious
disease causes high morbidity and mortality resulting in great economic
losses, especially in large industrial-type poultry complexes. It usually
occurs as an acute disease, but chronic infections can also occur in
some outbreaks. 


alt
G. E. Onet
H. L. Shivaprasad
1995
 
alt

HISTOMONIASIS alt(Slide Study set # 33)

Histomoniasis is a protozoan disease caused by the parasitic protozoan Histomonas meleagridis. The disease has a worldwide distribution.


alt
Tahseen Abdul-Aziz
L. R. McDougald
H. John Barnes 2012

Slide 2

GROSS LESIONS OF VELOGENIC VISCEROTROPIC
NEWCASTLE DISEASE
 alt(Slide study set # 4) *       
           
These slides show the lesions most commonly observed in chickens
that die ofvelogenic viscerotropic Newcastle disease (VVND). Not all
of the lesions described in this report are present in all or even a
large percentage of chickens. 


alt
C. W. Beard
1973

Slide 13

INCLUSION BODY HEPATITIS OF CHICKENS alt (Slide study set # 2) *

IBHC appears to be an emerging disease, this program was prepared as
a summary of current knowledge which hopefully will provide useful
guidelinesfor the diagnostician

 

alt
A. A. Bickford,
R. W. Winterfield,
A. M. Fadly
1973

Slide 11

INFECTIOUS BURSAL DISEASE alt (Slide study set # 14) *

Infectious bursal disease (IBD) is an acute viral infection of young chickens that
affects the lymphoid tissue particularly the bursa of Fabricius. 

 

alt 

P. D. Lukert
Revised by
Ahmed Mutlib
1985

Slide 4

INFECTIOUS CORYZA alt(Slide study set # 10) *

Infectious coryza of chickens is an acute respiratory disease caused by
Haemophilus paragallinarum.  The disease occurs in poultry raising areas
throughout the world.

 

alt
R. B. Rimler
R. B. Davis
1983

Slide 15

INFECTIOUS LARYNGOTRACHEITIS alt (Slide study set # 15A)

Laryngotracheitis (LT) is an acute viral respiratory disease primarily of chickens.
Economic losses attributable to LT are increasingly important in many poultry
producing areas throughout the United States and the world.


alt
Tahseen Abdul-Aziz
James S. Guy
H. John Barnes
2011
Slide 13

MARBLE SPLEEN DISEASE OF RING-NECKED PHEASANTS  alt
(Slide study set # 17) *

Marble spleen disease (MSD) is a contagious disease of confinement-raised
pheasants. It has been a significant cause of mortality in many areas of the
United States, Canada, and Europe during the last 30 years. Marble spleen
disease is caused by a type II avian adenovirus.

 

 alt 

S. D. Fitzgerald
W. M. Reed
1992

Slide 30

MAREK'S DISEASE  alt(Slide study set # 26)

Marek’s disease virus (MDV) is able to induce a variety of syndromes and
pathological manifestation in chickens. Because of its economic impact, the
development of lymphomas in nerves and viscera is the pathological feature
that has received the greatest attention. Nonetheless, there are other syndromes
associated with the replication of MDV such as transient paralysis (TP), and
lymphodegenerative syndromes,  that occur independently of the development
of lymphomas and are also addressed in this slide set.

 

alt
Isabel M. Gimeno
Richard L. Witter
Andrea Miles
2005
Slide 80

MUSCULOSKELETAL DISORDERS CAUSING LAMENESS IN
CHICKENS AND TURKEYS
 alt (Slide study set # 30)

Many peculiarities of the avian skeleton are related to flight. Other differences are
related to egg production. Many avian bones are hollow and contain air sacs. Air
sacs in bones make bones lighter but are of significance because air sacculitis
can result in osteomyelitis, arthritis and synovitis.

 

alt
Richard J. Julian
2010

alt

MYCOPLASMA GALLISEPTICUM INFECTION  alt(Slide study set # 29)

Mycoplasmas are very small bacteria that lack a cell wall and have a very small
genome. They are therefore resistant to antibiotics that act by inhibiting cell
wall synthesis, require a rich growth medium, and are more labile to inactivation
by environmental factors than are the more resistant typical bacteria with cell
walls, such as E. coli. Recent information, however, suggests that Mycoplasma
gallisepticum
(MG) cells survive longer outside the host than has been
previously believed. 

 

alt
S. H. Kleven
O. J. Fletcher
2007
alt

MYCOPLASMA MELEAGRIDIS INFECTION  alt(Slide study set # 13) *

Mycoplasma meleagridis (MM) was first isolated in 1958 from turkey poults with
air-sac lesions. Being antigenically distinct from M. gallisepticum, which was the
mycoplasma of primary concern in turkeys at that time, the new serotype was
named "Nstrain." Since then, the organism has been classified into the
H-serotype and given the present species name. 

 

alt
Richard Yamamoto
Herrad B. Ortmayer
Y. M. Saif
1983
alt

MYCOPLASMA SYNOVIAE INFECTION  alt(Slide study set # 12)

Mycoplasma synoviae(MS) is a pathogen of chickens and turkeys, causing
significant economic losses to poultry producers worldwide. Infection
can be associated with upper respiratory disease, airsacculitis, synovitis,
tenosynovitis, and bursitis. Disease severity has been influenced by other
respiratory pathogens (e.g., Newcastle disease virus, infectious
bronchitis virus), more virulent MS strains, and host species predilection
(turkeys more susceptible than chickens).

 

alt
Ziv Raviv
David H. Ley
2012

alt

NECROTIC ENTERITIS alt (Slide study set # 32)

Necrotic enteritis (NE) is an enteric bacterial disease of chickens,
turkeys, and a few other avian species caused by Clostridium perfringens.
The disease is characterized by damage to the intestinal mucosa by toxins
produced by the causative bacteria. It occurs worldwide and causes
considerable financial losses to broiler producers due to mortality,
treatment cost, and, in its milder subclinical form, poor growth and
feed utilization. The disease was first reported in chickens in 1961.

alt
Tahseen Abdul-Aziz
H. John Barnes
2012

 

 

 

 

Slide 11

PULLORUM DISEASE AND FOWL TYPHOID alt (Slide study set # 22) *

Pullorum disease (PD) and fowl typhoid (FT) are highly infectious and contagious
diseases of poultry first described in 1900 and 1888, respectively. Losses from
PD and FT were so severe that they once impaired the expansion of the poultry
industry. Currently, reports of FT in the U.S. are rare.  

 

alt
H. L. Shivaprasad
R. P. Chin
1996

alt

RNA TUMOR VIRUSES  alt(Slide study set # 27A)

Avian tumor viruses include Marek’s disease virus (MDV), reticuloendotheliosis
virus (REV) and the avian leukosis sarcoma group of retroviruses (ALSV). 
MDV is a herpesvirus, and REV and ALSV are retroviruses unrelated to each
other.  All avian retroviruses of economic significance are classified within the
family Retroviridae, subfamily Orthoretrovirinae.   

 

alt
Guillermo Zavala
2009

Slide 9

 SYSTEMIC VIRAL DISEASES OF PET BIRDS  alt(Slide study set # 21) *

The purpose of this slide study set is to review several of the important systemic      
viral diseases which are unique to pet birds. Three important systemic viruses
which are unique to pet birds will be described: herpesvirus (Pacheco's disease),
circovirus (psittacine beak and feather disease), and polyomavirus (budgerigar
fledgling disease).  

 

alt
S. D. Fitzgerald
W. M. Reed
1995
Viral Arthritis Slide 1 VIRAL ARTHRITIS  alt(Slide study set # 1) *

Viral arthritis is an infectious disease of chickens and turkeys, affecting
primarily the synovial membrane and tendon sheaths, caused by a reovirus.    

alt
N. O. Olson
1975
Revised by
G. E. Onet
1994

alt

AN OVERVIEW OF EXOTIC NEWCASTLE DISEASE alt(Slide study set #35)

Exotic Newcastle disease is a highly contagious acute viral disease of most
(if not all) species of birds. Often called "Exotic ND" or "END" in the USA
because virulent strains are not endemic in USA poultry.


alt
H. L. Shivaprasad
R. Crespo
2013


Marek's Disease               

 
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