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Chlamydia psittaci Antibody, Serum (IgM and IgG)

Published: August 9, 2026Updated: August 16, 2026

This test checks for antibodies to *Chlamydia psittaci*, a bacterium linked to certain respiratory infections. Antibodies indicate past or potential exposure.

Quick summary

["This test helps assess risk for psittacosis, a rare but serious illness."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
111422-2
Short code
C psittaci Ab Msmt Ser
Synonyms
C psittaci Ab Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test detects two types of antibodies—IgM (acute phase) and IgG (long-term response)—against *Chlamydia psittaci*. IgM appears early if you recently had an infection, while IgG may persist longer if you were previously exposed.

Why Might You Need This Test?

You may be tested if you have symptoms like fever, cough, or pneumonia after contact with birds (e.g., parrots, cockatiels) or exposure to contaminated environments. Doctors may also order it for people with unexplained respiratory infections.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein in your arm. The serum portion of your blood is tested for antibodies.

What to Expect After the Test

Results are typically ready within 2–5 business days. You’ll discuss them with your healthcare provider, who may recommend further testing or treatment if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Chlamydia psittaci antibodies

Frequently asked questions

What does a positive result mean?
A positive result suggests past or recent exposure to *Chlamydia psittaci*. This doesn’t always mean you’re sick now, but it may indicate a risk for psittacosis. Your doctor will guide next steps, including whether to treat symptoms or monitor closely.
What does a negative result mean?
A negative result means no detectable antibodies were found at this time. However, it doesn’t rule out past exposure—antibodies may take weeks to develop. Repeat testing may be needed if you suspect exposure.
Could this test be affected by medications?
Yes, certain medications (e.g., antibiotics, immunosuppressants) or chronic illnesses (e.g., HIV) might influence antibody levels. Your doctor will consider these factors when interpreting results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy