Presentation on theme: "Tom Rand’s presentation Perinatal infection continued: Elusive cause of meningitis in a young infant Contributed by Ingrid Lundgren, MD, MPH St. Luke’s."— Presentation transcript:
Tom Rand’s presentation Perinatal infection continued: Elusive cause of meningitis in a young infant Contributed by Ingrid Lundgren, MD, MPH St. Luke’s Children’s Infections and Immune Deficiency Clinic
History 7-week-old term Hispanic male presents with fever to 102 F, fussiness Eating well, normal urine output, no V/D Physical exam- essentially normal, except appeared inconsolable in ED prompting complete septic workup
Birth History 39 weeks gestation, 7lbs 1oz NSVD, no complications Pregnancy - maternal hypertension, denied h/o sexually transmitted diseases. Prenatal labs normal Mother recalled receiving antibiotics during the delivery, but was afebrile and prenatal GBS negative
Past Medical History No prior hospitalizations No surgeries No past antibiotic prescription No medications No allergies With birth dose hep B, immunizations up to date Diet: breast fed with Similac supplementation
Social/Family History Social History: – Lives with mother, father, 2-year-old sister in Marsing, Idaho. – No known sick contacts. No travel or pets. – Parents originated in Mexico. Spanish speaking. Family History: – No relatives with severe infection, immune deficiency, or infant death. – Healthy 2 year old sister. Mother and father 32 years old and healthy.
Hospital course Given IV vancomycin, cefotaxime, and dexamethasone for meningitis Clinicians’ subjective impression bacterial meningitis and intention to treat for full course Admitted to Children’s Hospital, defervesced quickly Gradual improvement in irritability Thought to be baseline fussy infant Final Lab Results: – CSF culture: no growth – Bagged urine culture: mixed flora 80,000 colonies/ml with predominant Staphylococcus aureus. – Blood culture: no growth – Urine pneumococcal and GBS antigens: negative. – CSF HSV PCR: negative. Completed 10 day course of IV cefotaxime
2 days after discharge… Fussiness and fever to 102 F returned Normal neurologic signs except irritability CSF: WBC 3480 (84% neut, 4% lymph, 12% mono) RBC 13, glucose 37, protein 267 CSF Gram stain: many WBC, no organisms. Initially treated IV ampicillin, gentamicin, cefotaxime, and acyclovir
Testing 2 nd hospital admission CSF, blood, and urine cultures: no growth CSF enterovirus, paraechovirus, HSV, West Nile Virus PCR negative Brain MRI: Slightly prominent fluid overlying the frontal lobes and temporal lobes
Recurrent, culture-negative meningitis in young infant DDX? Regular bacterial pathogens GBS, E. coli, pneumococcus with failure of treatment of the first meningitis episode (10 days cefotaxime) Other fastidious GNR (HACEK group) Listeria TORCH – Toxoplasma, Syphilis, CMV, HSV, HIV Viral meningitis Tuberculosis Parameningeal focus of infection or anatomic abnormality – CSF communication
Further testing 2 nd hospital admission Anatomic Evaluation MRI of the spine: No epidural abscess, no abnormality of vertebrae Consultation and physical exam by pediatric neurosurgeon -No signs of lumbosacral defects or any other communication with CNS TORCH Evaluation Toxoplasma IgG and IgM negative, Toxo PCR on CSF negative Rule-out congenital syphilis Treponemal antibody screen positive Treponema pallidum particle agglutination (TPPA) positive Serum and CSF VDRL non-reactive, serum RPR non-reactive Long bone films, brain MRI, ophthalmologic exam, and hearing test normal Maternal RPR negative at prenatal 9 week visit, subsequent maternal RPR positive postpartum Conclusion: Mother acquired syphilis infection during pregnancy. Infant not infected.
Management 2 nd hospital admission Further CSF testing not done as no remaining fluid available Treatment: – Acyclovir stopped – CSF HSV PCR negative, MRI normal – 10 days of ampicillin then 10 days of penicillin, 7 days of gentamicin during 21 days of cefotaxime treating possibilities GBS, syphilis, Listeria, fastidious GNR, pneumococcus Repeat lumbar puncture performed after 3 days of antibiotics: RBC 0, WBC 0, glucose 30 and protein 94. Discharged home, seen in follow-up 1 week later, doing great Happy, not fussy, eating well, gaining weight, development on track
4 weeks after discharge… The patient is now 4 months old Fever F, mild rhinorrhea/congestion Seizure- left-sided facial twitching of forehead and eyelids, drooling and generalized shaking. ED: generalized tonic-clonic seizure for 30 min, rectal Diastat given CSF: 660 WBC (85% neut, 13% lymph), 338 RBC, glucose 39, protein 125 Gram stain: many WBC, no organisms seen Negative antigens: pneumococcus, GBS, Hib and Neisseria meningitidis
3 rd Time’s a charm? Expanded DDX? Relapsed CNS congenital syphilis Viral – enterovirus, parechovirus, CMV, rotavirus, astrovirus, VZV, EBV, HTLV ½, HIV, respiratory viruses Genital Mycoplasma and Ureaplasma Other spirochete Cryptococcus Malignancy – astrocytoma, lymphoma, etc. Immune deficiency Autoimmune – sarcoidosis, SLE, NOMID, other
Management 3 rd hospital admission Vancomycin, cefotaxime, acyclovir, and penicillin G IV Repeat LP after 48 hours: WBC 82 (59% neut, 18% lymph, 22% mono), RBC: 0, Gucose: 39, Protein 138
Additional Lab Studies CSF: NEGATIVE STUDIES Bacterial, fungal, AFB culture VDRL HSV PCR Enterovirus parechovirus PCR CMV PCR HHV-6 PCR Cryptococcal antigen Cytology SEROLOGIES: NEGATIVE CMV IgG and IgM, and PCR Toxoplasma IgG and IgM HIV antibody, and PCR Cryptococal Antigen Mycoplasma pneumoniae IgM HTLV ½ antibody Other - NEGATIVE: Stool culture Rotavirus antigen Urine CMV culture Respiratory viruses PPD IMMUNOLOGIC - NORMAL Quantitative immunoglobulins Lymphocyte subsets Complement CH 50 RADIOLOGY STUDIES Spine MRI CT temporal bone Repeat Brain MRI – slight increase extra-axial fluid
MRI Findings Small bilateral subdural effusions Small 2 mm focal hyperintensity along frontal dura – This may represent a tiny subacute hemorrhage or short segment focal venous thrombosis.
Then …. Mycoplasma hominis identified by PCR of CSF: Positive by Mycoplasma-specific primers and universal 16S bacterial primers Treated with 6 weeks of moxifloxacin and rifampin, initially IV followed by PO CSF PCR negative on therapy at 14 days Clinic follow-up over 12 months after completion of therapy – normal development
Mycoplasma hominis Genital mycoplasmas (M. hominis, M. genitalium, and Ureaplasma) found in female genital tract, often in conjunction with other STIs. Considered co-pathogen in chorioamnionitis and other genital tract infection. Very rare neonatal CNS pathogen (premature infants) 1988 study of 100 preterm infants with suspected meningitis – 5 M. hominis, 8 Ureaplasma by culture Another study 318 neonatal meningitis – 9 M. hominis, 5 Ureaplasma Most cases cleared meningitis without directed therapy Clinical course variable – asymptomatic to neurologically devastating Chronic infection has been observed
Perinatal infection of term infant with Mycoplasma hominis? Risk factors : prematurity, maternal chorioamnionitis Presence of syphilis may have predisposed to ascending infection with M. hominis, with inflammation of placenta and genital tract
Unique features of case Clinical response to beta-lactam antibiotic with recrudescence after each of 2 full courses. Successful treatment with fluoroquinolone. Purulent CSF in typical bacterial range (700 to 3000 WBC neutrophil predominant) Congenital syphilis was evaluated due to untreated maternal syphilis, but ultimately not consistent with serologic evaluation. Molecular diagnosis of culture-negative CSF
References Krausse R, Shubert S. In vitro activities of tetracyclines, macrolides, fluoroquinolones and clindamycin against Mycoplasma hominis and Ureaplasma ssp isolated in Germany over 20 years. Clin Micro and Infect Bayraktar et al. Prevalence and antibiotic susceptibility of Mycoplasma hominis and Ureaplasma urealyticum in pregnant women. Intl. J Infect Dis Hata et al. Mycoplasma hominis meningitis in a neonate: Case report and review. J of Infection Wolthers et al. A case of Mycoplasma hominis meningo-encephalitis in a full-term infant: rapid recovery after start of treatment with ciprofloxacin. Eur J Pediatr Waites K, et al. Congenital and opportunistic infections: Ureaplasma species and Mycoplasma hominis. Sem in Fetal and Neonatal Med Watt K, et al. Pharmacokinetics of Moxifloxacin in an infant with Mycoplasma hominis meningitis. Pediatr Infect Dis J Knausz et al. Meningo-encephalitis in a neonate cuased by maternal Mycoplasma hominis treated successfully with chloramphenicol. J. Med Microbiol Chong et al. Successful treatment of multiple subdural empyemata caused by Mycoplasma hominis in a newborn. Neonatology Waites et al. Mycoplasmal infections of cerebrospinal fluid in newborn infants from a community hospital population. Pediatr Infect Dis J Waites et al. Chronic Ureaplasma urealyticum and Mycoplasma hominis infections of central nervous system in preterm infants. Lancet 1988.
Case example is ideal for molecular diagnosis by PCR (polymerase chain reaction) M. hominis culture not readily available and not very sensitive – Even the reference lab would rather do PCR Also detected by universal bacterial PCR for 16S ribosomal sequences Will PCR replace all other testing for infections? Answer: nope
Where you would not use PCR Well standardized diagnostic approach detects with clinically appropriate sensitivity/specificity – Antigen (throat swab for group A Strep) – Antibody (West Nile virus meningoencephalitis) – Culture (abscess I&D) Main hazard of PCR is cross-contamination that is eliminated by proper lab practices
Apply the best test for the specimen Cutaneous HSV lesion: viral culture for HSV appropriate sensitivity, cost and availability CSF for HSV encephalitis: PCR necessary for sufficient sensitivity
You may have learned Recommendations for neonatal HSV have become more aggressive – dose and duration of IV acyclovir – pre-emptive treatment of known perinatal exposure – suppressive oral acyclovir after IV treatment Congenital CMV causes delayed-onset hearing loss missed by newborn hearing screening. Antiviral therapy is used selectively for symptomatic congenital CMV. Valganciclovir oral dosing allows duration of therapy that may prevent progressive hearing loss.
You may have learned Perinatal prophylaxis for hepatitis B with HBIG and HB vaccine fails to prevent infection 5% of cases, so follow-up testing for infant is important. Role for maternal antiviral therapy is developing and appears to be safe. No consistent consequences on infant neurodevelopment result from Lyme disease in pregnancy. Ebolavirus in pregnancy is nearly always associated with death of mother and fetus. Molecular testing by PCR identifies some perinatal infections that traditional microbiology or serology testing fails.