VTPB 334 EXAM 1 QUESTIONS AND ANSWERS
100% PASS
Common fungal diseases - ANSWER • Aspergillosis
• Candidiasis
• Aflatoxicosis
What is Aspergillosis? - ANSWER - An acute or chronic fungal disease caused by
Aspergillus fumigatus that primarily affects the lower respiratory system
- Also referred to as
• brooder pneumonia
• mycotic pneumonia
• pneumomycosis
Aspergillus occurs in ? - ANSWER most species of poultry as well as wild birds and
captive exotics
Where can Aspergillus be found? - ANSWER Normally present in feed and litter to some
extent
What is Aspergillus fumigatus? - ANSWER • A. fumigatus has two life cycle phases
- Spore form
• When fungus encounters adverse conditions, it becomes dormant
- Allows the fungus to withstand excessively dry, hot or cold temperatures, or lack of
nutrients
• In this form, the fungus is very resistant to disinfectants
Hatchery infection of embryos and young birds with A. fumigatus - ANSWER - can
, penetrate eggshells if conditions are optimal (heat, moisture)
- Puncturing eggs for in ovo vaccination increases the susceptibility of eggs to
contamination
- Infected eggs break in the hatchery, releasing high numbers of spores which newly
hatched chicks inhale
Infection of birds on the farm (less common) with A. fumigatus - ANSWER - Adult birds
may contract the disease through the inhalation of large numbers of spores from the
environment
Clinical Signs of Aspergillosis - ANSWER • Respiratory lesions
- dyspnea (labored breathing)
- cyanosis
• Variable morbidity
• High mortality with notable increases following high-stress situations
• Green-tint to eggs upon candling
• Inappetence
Aspergillosis Lesions - ANSWER • Patchy or diffuse reddening of the lungs
• Millet-shaped yellow or grey nodules in the lungs, air sacs, trachea, or bronchi
• Grey, green, blue, or black fuzzy material on the air sacs and bronchi of the lungs
• Survivors may develop ascites or round heart
Diagnosis of Aspergillosis - ANSWER • observation of classical signs and lesions
• observing lesions microscopically
Aspergillosis Control & Treatment - ANSWER • Treatment is very difficult
• Cull clinically infected birds and remove mold source
• Clean and disinfect the house before spraying it with a 1:2000 copper sulfate solution,
100% PASS
Common fungal diseases - ANSWER • Aspergillosis
• Candidiasis
• Aflatoxicosis
What is Aspergillosis? - ANSWER - An acute or chronic fungal disease caused by
Aspergillus fumigatus that primarily affects the lower respiratory system
- Also referred to as
• brooder pneumonia
• mycotic pneumonia
• pneumomycosis
Aspergillus occurs in ? - ANSWER most species of poultry as well as wild birds and
captive exotics
Where can Aspergillus be found? - ANSWER Normally present in feed and litter to some
extent
What is Aspergillus fumigatus? - ANSWER • A. fumigatus has two life cycle phases
- Spore form
• When fungus encounters adverse conditions, it becomes dormant
- Allows the fungus to withstand excessively dry, hot or cold temperatures, or lack of
nutrients
• In this form, the fungus is very resistant to disinfectants
Hatchery infection of embryos and young birds with A. fumigatus - ANSWER - can
, penetrate eggshells if conditions are optimal (heat, moisture)
- Puncturing eggs for in ovo vaccination increases the susceptibility of eggs to
contamination
- Infected eggs break in the hatchery, releasing high numbers of spores which newly
hatched chicks inhale
Infection of birds on the farm (less common) with A. fumigatus - ANSWER - Adult birds
may contract the disease through the inhalation of large numbers of spores from the
environment
Clinical Signs of Aspergillosis - ANSWER • Respiratory lesions
- dyspnea (labored breathing)
- cyanosis
• Variable morbidity
• High mortality with notable increases following high-stress situations
• Green-tint to eggs upon candling
• Inappetence
Aspergillosis Lesions - ANSWER • Patchy or diffuse reddening of the lungs
• Millet-shaped yellow or grey nodules in the lungs, air sacs, trachea, or bronchi
• Grey, green, blue, or black fuzzy material on the air sacs and bronchi of the lungs
• Survivors may develop ascites or round heart
Diagnosis of Aspergillosis - ANSWER • observation of classical signs and lesions
• observing lesions microscopically
Aspergillosis Control & Treatment - ANSWER • Treatment is very difficult
• Cull clinically infected birds and remove mold source
• Clean and disinfect the house before spraying it with a 1:2000 copper sulfate solution,
