Q: My child has no fever but tested positive for Streptococcus and Haemophilus. What do these pneumonia test results mean?
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
My child didn't have a fever or a severe cough, but since pneumonia is going around, our doctor suggested a swab test for the nose and throat. The results came back positive for Streptococcus and Haemophilus bacteria. Mycoplasma was negative. A simple blood test showed an inflammation level of 0 and a normal white blood cell count.
I also heard a viral level (it sounded like "HPV") was high, and the doctor mentioned it was judged as a combination of a virus and pneumonia. I have a few questions:
I heard a blood test can accurately determine if it's Mycoplasma pneumonia, but I didn't get to ask about it. Is there any chance it could still be Mycoplasma?
If a child doesn't have a bad cough or fever, and they had bacterial pneumonia without being tested or treated, would it become severe without us knowing?
I only heard the bacteria was Haemophilus. Do we need a more detailed blood test to find out if it's an antibiotic-resistant strain or just a common bacteria?
Answer:
It is completely understandable to have many questions after seeing your child's test results. Let's break down the information step by step.
【Understanding the Test Results】
Streptococcus and Haemophilus detected (via PCR swab test): These bacteria commonly live in the noses and throats of healthy children as normal flora. Therefore, simply detecting them does not definitively mean they are the cause of pneumonia.
Negative Mycoplasma + Inflammation level (CRP) of 0 + Normal white blood cells: This indicates that the likelihood of a severe bacterial infection right now is very low.
Regarding the "high HPV" level: It is highly likely that this was actually referring to HRV (Rhinovirus) or HMPV (Human Metapneumovirus), which are common respiratory viruses. HPV typically refers to the human papillomavirus, which is almost never part of a standard respiratory test panel.
【Addressing Your Questions】
The possibility of Mycoplasma
If the nasal and throat PCR test was negative, the current chance of a Mycoplasma infection is very low. While it can be further confirmed with a blood antibody test (IgM/IgG), additional testing is likely unnecessary right now since your child's symptoms are mild and inflammation levels are normal.
What if bacterial pneumonia is missed due to a lack of symptoms?
If it were true bacterial pneumonia, children typically present with a high fever, worsening cough, difficulty breathing, and decreased appetite. It is very rare for bacterial pneumonia to become severe without showing such noticeable symptoms. Given the lack of fever, mild cough, and normal inflammation levels, this is much more likely a simple viral infection combined with the detection of bacteria that naturally reside in the respiratory tract.
Determining if Haemophilus is an antibiotic-resistant strain
To find out if Haemophilus is resistant to antibiotics, a culture and susceptibility test is required. A PCR test alone cannot determine antibiotic resistance. Since the symptoms are mild and the inflammation levels are normal, monitoring your child's condition is more important right now than worrying about resistant bacteria. If antibiotics were prescribed, observe the symptoms; if there is no improvement or if they worsen within three days, a clinical re-evaluation is needed.
【What to Do Next】
Administer any prescribed medications exactly as directed by your doctor.
Ensure your child gets plenty of fluids and rest.
Please seek an immediate in-person medical evaluation if any of the following occur:
A fever of 38.0°C (100.4°F) or higher
A sudden or rapid worsening of the cough
Shortness of breath or chest retractions (the chest pulling in when breathing)
Complete refusal to drink fluids or eat
Severe lethargy (your child is much less active than usual and unresponsive to play)
In summary, the current results lean much more toward a viral infection with the detection of normal respiratory bacteria, rather than a severe bacterial infection. Keep a close eye on your child's symptoms, and consult your pediatrician again if their condition worsens or fails to improve.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
