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Carrión's Disease

II. Presence of Bartonella bacilliformis in the Peripheral Blood of Patients with the Benign Form

Blood cultures made over a period of six months from persons known to be infected with B. bacilliformis, the etiological agent of Carrión's disease, support the following conclusions:

1. The proportion of positive cultures is much higher in the first months of infection than later.

2. Negative blood cultures have little significance in the diagnosis of the benign form of the disease.

3. The results of blood culture are similar in both asymptomatic infections and those with manifest symptoms.

4. The inability to cultivate B. bacilliformis with regularity from the blood of asymptomatic cases reduces the likelihood that these cases can serve as reservoirs of the disease.

¹ Chief of the Section of Medical Entomology, National Institute of Hygiene and Public Health, Lima.