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Bulletin No. 20 - Winter 2004
BacterologyChlamydia
LONGBOTTOM D
Chlamydial infections of domestic ruminants and swine: new nomenclature and new knowledge [Editorial].
Veterinary Journal, 2004, Volume 168, Nº1, 9-11
The new nomenclature of the family Chlamydiaceae comprises two genera, Chlamydia and Chlamydophila. The genus Chlamydia comprises C. trachomatis, C. muridarumand C. suis while the genus Chlamydophila comprises C. psittaci, C. pecorum, C. pneumoniae, C. abortus, C. felis and C. caviae. In swine, chlamydiosis can be caused by C. abortus C. pecorum and C. suis. C. abortus has been identified as responsible for abortion in swine but only sporadically. Concomitant infections with C. abortus and C. suis may often occur making it difficult to attribute the clinical manifestations to one or the other. As for C. pecorum, it can cause a wide range of pathologies including polyarthritis, conjunctivitis, pneumonia, metritis, encephalomyelitis and subclinical enteric infections. Infection with C. suis (the former C. trachomatis-like swine isolates) can result in enteritis, pneumonia, conjunctivitis, pericarditis, perinatal mortality and reproductive disorders. The main problem researchers have to deal with is the lack of epidemiological and prevalence data about chlamydial infections in livestock. In this context a European collaborative network has been created with the aim of standardizing methods for diagnosis of chlamydiosis and accumulating information in order to better understand the impact of chlamydiosis in livestock and propose possible means of control.
