| | Incubation | Treatments | Symptoms | Transmission |
| PBFD virus | Minimum of 1-4 weeks, possibly months | Put in quarantine, adult birds can survive infection | Feather dystrophy and loss, beak deformities, secondary infections, death
| Through areosols, droppings, crop feeding and dander |
| Polyoma virus | As little as 48 hours to a few weeks. | Put in quarantine, adult birds can survive infection | Eventual lesions, weight loss, poor feather formation, tremors, decreased hatchability
| Through areosols, droppings, crop feeding and dander |
| Pacheco's Disease virus | As little as 48 hours after exposure | Acyclovir; natural immunity can occur, quarantine | Lethargy, anorexia, drowsiness, ruffled plumage, intermittant diahrrea, liver lesions
| Feces, nasal discharge, spreads rapidly, birds can survive infection and become asymtomatic carriers.
|
| Avian Influenza virus | Few hours to 3 days, varies | Very sensitive to disinfectants, readily inactivated by heating and drying | Variable, decreased food consumption and drop in egg production
| Saliva, nasal secretions and feces (wild birds a major source) |
| West Nile virus | Unknown
| No known treatment | Tremors, lethargy | Can be transmitted from bird to bird through mosquitoes |
| Newcastle Disease virus | Usually 3-7 days, in some cases up to 25 days | Resistant to most disinfectants | Respiratory problems, diarrhea, depression, tremors, drop in egg production, tissue swelling
| Direct contact between healthy birds and infected birds |
Chlamydia
(Psittacosis) | Minimum of 4-6 weeks, maximum is unknown | Antibiotic treatment | Rough plumage, lethargy, emanciation, dehydration, yellow green droppings
| Air circulation of dry feces or dander, mites |
| Tuberculosis (Mycobacterium avium) | Weeks to years | No effective treatment | Chronic wasting disease, loss of balance, respiratory problems, eventual death
| Through feces, urine, upper respiratory fluid |
| Clostridium | Days to weeks. | Antibiotic treatment antitoxin | Toxins cause respiratory paralysis, diarrhea, digestive track disorders
| Ingestion, wound infection, spores survive for years in the environment |
| E. Coli | 24 - 48 hours | Sensitivity test, antibiotic treatment | Rough plumage, lethargy, diarrhea, emaciation, dehydration
| Ingestion, dust egg transmission |
| Pasteurella | 24 - 48 hours | Sensitivity test, specific antibiotic treatment | Chronic respiratory disease, damaged blood vessels, diarrhea
| Shed from upper respiratory tract, mucus; fecal shedding is rare
|
| Pseudomonas | Few hours | Sensitivity test, antibiotic treatment | Rough plumage, lethargy, diarrhea, upper respiratory tract problems
| Ingestion, proliferates in H2O, secondary in open wounds
|
| Cryptosporidium | Days to weeks | No effective therepy | Diarrhea, depression, anorexia, weight loss
| Shed through fecal material, contaminated soil, water and surfaces
|
| Giardia | Days to weeks | Asymptomatic carriers may exist. Metronidazole | Diarrhea, depression, lethargy, anorexia, weight loss, itchy skin, feather plucking
| Cysts and trophozoites are shed through fecal material |
| Aspergillosis | 3 - 7 days | Antifungal agents surgical | Weight loss, respiratory problems, anorexia, vomiting, diarrhea
| Airborne spores, infected shavings or feed |
| Candida | Primary crop infections 24 - 72 hours | Antifungal agents, Nystatin | Regurgitation, vomiting, increased crop emptying time, crop irritations
| Improper hygiene |
