Screening for several potential pathogens in feral pigeons (Columba livia) in Madrid.
BACKGROUND
Pathogens with the zoonotic potential to infect humans, such as Campylobacter jejuni, Campylobacter coli and Chlamydophila psittaci, can be found in feral pigeons (Columba livia). Given the high density of these birds in the public parks and gardens of most cities, they may pose a direct threat to public health.


METHODS
A total of 118 pigeons were captured in three samplings carried out in 2006-2007 in public parks and gardens in Madrid, Spain. Standard haematological and morphological analyses were carried out on the pigeons. PCR was used to screen for the presence of Campylobacter jejuni, C. coli and Chlamydophila psittaci. Positive samples were confirmed by DNA sequencing.


RESULTS
The analyses demonstrated a high prevalence of Chlamydophila psittaci (52.6%) and Campylobacter jejuni (69.1%) among the birds captured. In contrast, Campylobacter coli was rarely detected (1.1%).


CONCLUSIONS
Pigeons in Madrid can carry Chlamydophila psittaci and Campylobacter jejuni. They may be asymptomatic or subclinical carriers of both pathogens.
Vázquez
Belén
B
CISA-INIA, Animal Health Research Center, Madrid, Spain.
Esperón
Fernando
F
Neves
Elena
E
López
Juan
J
Ballesteros
Carlos
C
Muñoz
María Jesús
MJ
D000818:Animals; D001424:Bacterial Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D001715:Bird Diseases / Q000097:blood / Q000453:epidemiology / Q000382:microbiology*; D001772:Blood Cell Count / Q000662:veterinary; D017000:Campylobacter coli / Q000235:genetics / Q000302:isolation & purification*; D016123:Campylobacter jejuni / Q000235:genetics / Q000302:isolation & purification*; D016009:Chi-Square Distribution; D002691:Chlamydophila psittaci / Q000235:genetics / Q000302:isolation & purification*; D002988:Cloaca / Q000382:microbiology; D010856:Columbidae; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D006400:Hematocrit / Q000662:veterinary; D016133:Polymerase Chain Reaction / Q000662:veterinary; D015995:Prevalence; D013030:Spain / Q000453:epidemiology; D015047:Zoonoses / Q000382:microbiology
D004269:DNA, Bacterial