Bacterial Respiratory Disease and Air-sacculitis
Learn what the condition is, how it may be detected early, how it is treated or managed, and which breeds or species are linked to it.
Condition snapshot
A concise guide to the condition’s pattern, detection, management and urgency.
This snapshot is a general guide, not a diagnosis or treatment plan. New, severe or worsening signs require veterinary assessment.
About the condition
Bacterial respiratory disease can involve nares, choana, trachea, lungs and air sacs. Air-sacculitis is inflammation of the thin air sacs and may follow primary bacterial infection, aspiration, immunosuppression or spread from another organ. Gram-negative opportunists such as Klebsiella, Pseudomonas and Escherichia coli are important in companion birds, but Mycoplasma and gram-positive organisms also occur.
Poor ventilation, crowding, malnutrition, contaminated nebulisers or hand-feeding equipment, transport stress and preceding viral or fungal disease weaken defences. Signs include nasal discharge, sneezing, altered voice, tail bobbing, increased respiratory rate, exercise intolerance, open-mouth breathing and weight loss. Air sacs lack the same blood supply as lungs, allowing fibrin and caseous material to persist. Infection can become systemic.
Respiratory signs do not prove bacterial disease. Aspergillosis, chlamydiosis, air-sac mites, goitre, cardiac enlargement, reproductive pressure and inhaled toxins overlap. A superficial cloacal or cage swab does not identify the organism in the lower airway, and finding normal flora in the mouth can lead to inappropriate antibiotics.
Prognosis is good for early susceptible infection with corrected husbandry and guarded for extensive caseous air-sac disease, resistant organisms or a continuing aspiration source. Birds hide respiratory compromise and can collapse during restraint. Antibiotic selection must reach the infected site at an effective dose; brief empirical courses encourage relapse and resistance. Prevention focuses on nutrition, ventilation, clean respiratory equipment and safe feeding technique rather than routine antibiotics at every sneeze. Bacteria may infect the upper airway, lungs or air sacs as a primary problem or after viral disease, aspiration, poor ventilation or immune compromise. Nasal discharge, voice change, exercise intolerance and tail bobbing are common but nonspecific. Air-sac infection can become chronic because poorly vascularised membranes limit immune access and drug penetration.
Screening & Early Detection
Observe the undisturbed bird for respiratory rate, tail movement, posture, voice and tolerance before capture. Record diet, ventilation, aerosols, hand feeding, regurgitation, recent antibiotics and contact disease. Examination includes nares, choana, trachea, coelomic distension and body condition with minimal restraint.
Complete blood count and chemistry evaluate inflammatory and systemic effects. Radiographs assess lungs, air sacs and organ enlargement. Choanal sampling can help upper-airway disease, but tracheal wash, air-sac aspirate or endoscopic biopsy more accurately represents lower lesions. Cytology is paired with aerobic and anaerobic culture and susceptibility before antimicrobials where safe.
PCR is selected for Mycoplasma, Chlamydia or other specific agents rather than as a generic panel. Oxygen stabilisation precedes invasive testing in dyspnoea. Rechecks use gram weight, respiratory effort, blood values and repeat imaging or endoscopy. A bird that improves briefly but relapses needs review for abscessed material, fungal disease, aspiration or an incorrect drug. A guarded respiratory sample collected before antibiotics is preferable to a superficial mouth swab. Cytology demonstrates inflammation, and culture with susceptibility testing guides drug choice. Radiographs or endoscopy localise air-sac and lung disease; chlamydiosis, aspergillosis, obstruction and cardiac illness remain important alternatives.
Treatment & Management
Provide oxygen, controlled warmth and minimal handling to birds with increased effort. Fluids and nutrition are tailored to respiratory capacity and crop function; force feeding a severely dyspnoeic bird risks aspiration. Remove smoke, dust and abdominal compression contributors.
Start an antimicrobial chosen from lesion cytology, likely pathogens and local resistance, then refine it with culture and susceptibility. Route and duration must achieve air-sac or lung concentrations. Nebulisation can supplement systemic therapy for selected agents but is not a substitute for adequate blood delivery. Caseous plaques may require endoscopic removal or air-sac lavage. Treat aspiration source, chlamydiosis, immunosuppression or fungal coinfection separately.
Monitor hydration, kidney and liver values for drug toxicity and repeat imaging in deep infection. Clean nebulisers after every use and correct ventilation, crowding and malnutrition. Treatment continues until objective disease has resolved, not merely until voice or appetite improves. If respiratory effort worsens, reassess airway obstruction and oxygenation immediately. Contacts are treated only when a transmissible agent and exposure plan justify it; opportunistic air-sacculitis is not automatically a flock outbreak. Antibiotics are selected from culture and delivered for an adequate duration, sometimes by nebulisation in addition to systemic therapy. Oxygen and warmth precede stressful procedures. Caseous air-sac plaques may require endoscopic removal, while ventilation, aspiration risk and any vitamin A deficiency are corrected.
Breeds or species affected
Adelaide Rosella
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Bar-shouldered Dove
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Blue-faced Parrot Finch
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Bourke's Parrot
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Brown Quail
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Budgerigar
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Cockatiel
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Common Bronzewing
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Crested Pigeon
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Diamond Dove
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Eastern Rosella
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Elegant Parrot
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Emerald Dove
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Galah
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Gouldian Finch
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Hooded Parrot
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King Quail
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Little Button-quail
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Little Corella
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Long-billed Corella
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Musk Lorikeet
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Painted Button-quail
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Painted Finch
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Pale-headed Rosella
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Peaceful Dove
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Port Lincoln Parrot
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Princess Parrot
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Rainbow Lorikeet
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Red-capped Parrot
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Red-collared Lorikeet
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Red-rumped Parrot
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Scaly-breasted Lorikeet
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Scarlet-chested Parrot
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Star Finch
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Stubble Quail
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Sulphur-crested Cockatoo
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Twenty-eight Parrot
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Western Corella
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Western Rosella
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Yellow Rosella
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Zebra Finch
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Canary
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Society Finch
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Domestic Pigeon
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Indian Ringneck Parakeet
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Alexandrine Parakeet
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Peach-faced Lovebird
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Fischer's Lovebird
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Sun Conure
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Jenday Conure
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