A cura di Alessandra Russo. Specialista in Tossicologia Medica. Messina
Caso clinico (1)
Una bimba di 2 mesi venne ricoverata per la comparsa di diarrea e di febbricola (37,7°C).
La frequenza cardiaca era 132 battiti/min; frequenza respiratoria 32 atti/min; pressione sanguigna 85/54 mmHg.
I risultati degli esami di laboratorio erano i seguenti:
- Leucociti 17 × 109/l (neutrofili 60,2%; eosinofili 1,2%);
- Emoglobina, 107 g/l;
- PCR 17 mg/l;
- ALT 32 U/l;
- AST 28 U/l.
La bimba era stata sottoposta in precedenza ad intervento chirugico a livello intestinale ed era stata trattata con molti antibiotici per un lungo periodo di tempo.
Il giorno del ricovero venne trattata con vancomicina per via orale e metronidazolo per via endovenosa.
Venne osservato un miglioramento della diarrea.
Tuttavia, il quarto giorno di ricovero, i risultati degli esami di laboratorio erano i seguenti:
- Leucociti 23,27 × 109/l (neutrofili 29,4%; eosinofili 35%);
- Emoglobina, 101 g/l.
Il settimo giorno di ricovero, i risultati degli esami di laboratorio erano i seguenti:
- Leucociti 16,59 × 109/l (neutrofili 30%; eosinofili 23,9%);
- Emoglobina, 101 g/l;
- ALT 37 U/l;
- AST 30 U/l.
I test di funzionalità renale erano nel range della norma.
Una volta che i sintomi clinici migliorarono, la bimba venne dimessa dall’ospedale, con la seguente terapia: vancomicina (40 mg/kg/die) e metronidazolo (25 mg BID) per via orale per 1 settimana.
Due settimane dopo la fine della terapia, i risultati degli esami di laboratorio erano i seguenti: leucociti 9,6 × 109/l (neutrofili 42%; eosinofili 2,1%) ed emoglobina, 97 g/l.
Le reazioni avverse più spesso osservate nei pazienti trattati con vancomicina includono nefrotossicità, ototossicità e febbre (2).
A seguito dell’esposizione alla vancomicina, è stata anche riportata l’insorgenza di anemia, leucopenia, trombocitopenia e reazioni cutanee (3-6).
Sono stati segnalati anche diversi casi di eosinofilia associata ad uso di vancomicina (7-38).
Bibliografia
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