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Q. What is the reason behind neutropenia in an infant?

Answered by
Dr. Prakash H Muddegowda
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Oct 21, 2016 and last reviewed on: Oct 05, 2020

Hello doctor,

My baby boy is 3.5 months old. When he was 38 days old, he got a fever. I went to the hospital and the doctor said any infant who has fever without any other symptoms may have meningitis and so lumbar puncture was performed. It was positive and the WBC was 570 (clear), monomorph 80% and polymorph 20%. Though the culture of CSF was negative, no bacteria found. He was put on Penicillin and Cefotaxime for two days, but the fever did not settle down. Then, Penicillin was replaced with Vancomycin and the fever finally went away. He was on Cefotaxime and Vancomycin for 14 days. Then, CBC and differential had been tested and the neutrophils were low. It read 0.6. The next day before my baby was discharged it read 0.7. The doctor said that as long as it kept raising there was nothing to worry about. A week later the same test was done and the neutrophils were 0.9. Two weeks later it read 0.6 and then 0.9 and 0.6 in an interval of every two weeks. It kept raising and decreasing, but overall it is still very low.

I have not noticed any viral infection other than sometimes he gets red eyelid and teary eyes, but it disappears within a few hours. He usually rubs his face, eyes, nose and ears, especially when he wants to sleep. When he was in the hospital, I found a soft lump on his head. We did an MRI and the doctor said it is just a hematoma. He was born by an emergency C-section. I visited a pediatrician today who encouraged me to meet a hematologist. What is the reason behind neutropenia? Also, he has high lymphocytes of 7.70, lymphocytosis. Could it be something serious? I have attached his final test reports. Can you see anything else? Please help us.

#

Hi,

Welcome to icliniq.com.

Based on your query and attached reports (attachment removed to protect patient identity), my opinion is as follows:

  • Your baby boy probably had viral meningitis looking at the positive WBC and high monomorph along with a negative culture. Now, that he does not have any fever shows that he has responded very well to the treatment.
  • The count of neutrophils is usually low in infants and monomorph is usually high. Additionally, the neutrophils range keeps on varying with day of time, stress, any associated infections, etc.
  • The major worry would have been bone marrow depression if any or any infection. As neutrophils are being maintained above the critical 0.5, it is nothing to be worried about.
  • If there is any bacterial infection and the count is not raised, then it is a worry. All other values are good, so the bone marrow function is good.
  • Also, as the lymphocyte count is high (which is normal up to 4 years and it peaks around six months), relatively the neutrophil count appears fallen. Unless, he has an infection, these counts are totally acceptable.
  • There is no need to repeat the test, unless he has an infection. Repeating it every week will not change it and it should be done, only if he has an infection.
  • Red eyelids and teary eyes might be due to exposure to dust or crying. Nothing to worry, he is in good health.

Investigations to be done:

Routine evaluation is not necessary. Repeat complete blood count after three months or if there is any infection.

Treatment plan:

Continue the same.

Preventive measures:

Near normal range and variations are normal.

Regarding follow up:

For further information consult a hematologist online.---> https://www.icliniq.com/ask-a-doctor-online/hematologist

Thank you doctor,

Should I do any other test to make sure nothing serious? I searched on the internet and got terrified after reading leukemia, lupus, virus infection, hepatitis, herpes, etc. Do you think antibiotics through IV affected my baby's bone marrow? Is it fine to give regular vaccines for him?

#

Hi,

Welcome back to icliniq.com.

  • Bone marrow is not affected. If it were to be affected, hemoglobin, platelet counts and total white blood cell counts would have fallen.
  • Yes, antibiotics can affect marrow at any age group; however, here it is not affected.
  • These counts are totally acceptable and no further tests are necessary. The internet will show plenty of things and we always notice the bad things first.
  • This is very much within normal range and he is in good health.
  • The vaccine can be given. He is not immunocompromised or anything. His immunity is good. He might get a mild fever, which is normally seen after vaccination and can be controlled with Paracetamol.
  • Increased WBC in CSF (cerebrospinal fluid) usually means meningitis. Here, the blood report is normal and so cannot think of anything else.
  • There is no need to protect him. His neutrophil count is good enough to ward any bacterial infection. He is in good health and you need not worry.

For further information consult a hematologist online --> https://www.icliniq.com/ask-a-doctor-online/hematologist


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