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Infection and Immunity, March 1994, p. 1008-1014, Vol. 62, No. 3
0019-9567/1994/$04.00+0     DOI:

research-article

Immunoblot analyses of chimpanzee sera after infection and after immunization and challenge with Mycoplasma pneumoniae.

Laboratory of Mycoplasma, Food and Drug Administration, Bethesda, Maryland 20892.

ABSTRACT

Consecutive weekly or biweekly serum specimens obtained during a 3- or 4-month study from 16 chimpanzees were examined by immunoblot analyses to identify the immunogenic components of Mycoplasma pneumoniae. Six experimentally infected chimpanzees showed significant signs of overt disease, including cough, pharyngitis, rhinitis, fever, and loss of appetite. The sera of these infected chimpanzees recognized from 17 to 20 protein bands. Two control chimpanzees that were not inoculated were included in the study. Three chimpanzees immunized with a formalin-inactivated OSU-1A vaccine and three chimpanzees immunized with an experimental acellular vaccine showed minimal signs of disease on challenge. After challenge, the serum immunoblot responses of the immunized chimpanzees were similar to those of the infected chimpanzees. Before challenge, the sera of two previously infected chimpanzees recognized protein bands of 169 (which comigrated with the P1 adhesin), 148, 130, 117, 86, 61, 44, 35, 30, and 29 kDa. After challenge, the previously infected chimpanzees showed the most intense serum immunoblot responses and were most protected against colonization and disease. The sera from each of the 16 chimpanzees examined recognized a large number of immunogenic components, and the serum immunoblot responses were virtually identical to those of patients. Sera from each chimpanzee and patient recognized 169-, 148-, 130-, 117-, 86-, 44-, and 35-kDa bands and many of them recognized 67-, 63-, 61-, 56-, 32-, 30-, and 29-kDa protein bands.

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