Table 1.

Causes of transient neutropenia

INFECTION
Viral	Cytomegalovirus, Epstein-Barr virus, HIV, influenza, parvovirus B19
Bacterial	Brucella, paratyphoid, tuberculosis, tularemia, typhoid; Anaplasma phagocytophilum and other rickettsia
Protozoan	Plasmodium vivax, P. falciparum
DRUGS
Anticonvulsant	Carbamazepine, valproate
Antimicrobial	Sulfonamides, penicillins, trimethoprim/sulfamethoxazole
Antipsychotic	Clozapine, olanzapine, phenothiazines
Antirheumatic	Gold, levamisole, penicillamine
Antithyroid	Methimazole, propylthiouracil
Other	Aminopyrine, deferiprone, rituximab, levamisole-adulterated cocaine
IMMUNE
Neonatal isoimmune
Autoimmune