3 The child is 1 years old, got sick a few hours ago. It started with an increase in temperature 40C, Complaints of vomiting, anxiety, rash on the body. In the,,CBC: Hemoglobin 105 g/11, Erythrocytes 3.0x1012/1,4 Leukocytes 22.5 x 109/1, segmented 80%, Lymphocytes 10%, Rod-shaped 10%, ESR 30 mm/h CSF analysis: cytosis of 860 cells, neutrophils - 800 cells. lymphocytes-60 cells, protein - 1.0 g/l, glucose - 2.0 mmol/l, chlorides -115 mmol/l 47 1. Make a preliminary diagnosis 2. Prescribe a test to confirm this diagnosis? /Assign an analysis to confirm this diagnosis 3. Prevention/Aldyn alu sharalary/ Prevention
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Clinical Analysis
Patient Summary
- Age: 1 year old
- Onset: Acute (a few hours)
- Symptoms: High fever (40°C), vomiting, anxiety/irritability, body rash
- CBC: Leukocytosis (22.5 × 10⁹/L), left shift (segmented 80%, band neutrophils 10%), mild anemia, elevated ESR
- CSF: Cytosis 860 cells (neutrophils 800 / lymphocytes 60), protein ↑ (1.0 g/L), glucose ↓ (2.0 mmol/L), chlorides ↓ (115 mmol/L)
1. Preliminary Diagnosis
Purulent (Bacterial) Meningitis — Meningococcal Meningitis (Neisseria meningitidis) with probable Meningococcemia
Reasoning:
| Finding | Significance |
|---|---|
| Age 1 year, acute onset | Peak incidence of meningococcal disease is 6 months – 5 years (peak ~18 months) |
| Fever 40°C + vomiting + irritability/anxiety | Classic triad in infants (headache is rare at this age) |
| Rash on the body | Petechial/purpuric non-blanching rash occurs in >80% of meningococcal disease; initially may appear macular |
| CBC: Leukocytosis 22.5 × 10⁹/L + left shift (bands 10%, segs 80%) | Marked bacterial infection response |
| CSF: 860 cells, predominantly neutrophils (800/860) | Purulent (neutrophilic) pleocytosis — hallmark of bacterial meningitis |
| CSF protein 1.0 g/L (↑, normal <0.45) | Blood-brain barrier disruption |
| CSF glucose 2.0 mmol/L (↓, normal ≥2.8; CSF:serum ratio <0.5) | Bacterial consumption of glucose |
| CSF chlorides 115 mmol/L (↓, normal 120–130) | Consistent with bacterial meningitis |
The combination of acute onset, infant age, petechial/purpuric rash + fever + purulent CSF is the classic presentation of meningococcal meningitis/meningococcemia caused by Neisseria meningitidis.
— Harrison's Principles of Internal Medicine 22E, Clinical Manifestations; ROSEN's Emergency Medicine, p. 2600
2. Confirmatory Tests
Primary (Gold Standard)
| Test | Purpose | Expected Result |
|---|---|---|
| CSF culture on chocolate agar (incubated 37°C in CO₂) | Isolate N. meningitidis | Growth of Gram-negative diplococci |
| CSF Gram stain | Rapid morphology identification | Gram-negative intracellular/extracellular diplococci |
| Blood culture | Bacteremia confirmation | Positive in majority of cases |
Secondary / Rapid Tests
| Test | Purpose |
|---|---|
| CSF PCR (N. meningitidis-specific) | Highly sensitive, especially after antibiotics started |
| Latex agglutination / antigen test of CSF | Rapid capsular polysaccharide antigen detection (serogroups A, B, C, Y, W-135) |
| Meningococcal serology / ELISA | Antibody titers |
| Coagulation panel (PT, APTT, fibrinogen, D-dimer) | Rule out DIC (purpura fulminans) |
| Skin lesion biopsy with Gram stain | Can identify organism from petechiae |
| Repeat CBC with differential | Monitor progression |
Diagnosis is made by culturing the cerebrospinal fluid on chocolate agar incubated at 37°C in CO₂. — Jawetz, Melnick & Adelberg's Medical Microbiology 28E
3. Prevention (Алдын алу шаралары)
A. Chemoprophylaxis for Close Contacts
All household/close contacts should receive prophylaxis within 24 hours of diagnosis (secondary cases occur within 1–14 days):
| Drug | Dose | Duration |
|---|---|---|
| Rifampicin (preferred in children) | 10 mg/kg/dose (max 600 mg) twice daily | 2 days |
| Ceftriaxone | Single IM injection (125 mg <15 yrs; 250 mg ≥15 yrs) | Single dose |
| Azithromycin | 500 mg oral | Single dose |
| Ciprofloxacin | 500 mg oral (adults) | Single dose |
⚠️ Penicillin does not eradicate nasopharyngeal carriage — do not use for prophylaxis.
B. Vaccination (Long-Term Prevention)
- Meningococcal polysaccharide-protein conjugate vaccines (covering serogroups A, C, Y, W-135) — reduce nasopharyngeal carriage and invasive disease
- Serogroup B vaccine (MenB) — separate schedule due to different immunogenicity
- Routine schedule: 11–12 years; however, infants in high-risk areas may receive earlier (MenACWY from 2 months in some schedules)
C. Public Health Measures
- Report to public health authorities (notifiable disease)
- Isolation of the patient (droplet precautions) for 24 hours after antibiotic initiation
- Surveillance of contacts for fever/rash in the 2 weeks following exposure
- Avoid overcrowding; improve ventilation
Providing vaccination to at-risk individuals is the best option for the long-term control of meningococcal disease. — Goldman-Cecil Medicine
Treatment note (for completeness): Immediate empiric IV penicillin G or ceftriaxone should not be delayed. Consider dexamethasone (0.15 mg/kg every 6 hours × 4 days) started before or with the first antibiotic dose to reduce inflammatory sequelae.
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