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Natural cross chlamydial infection between livestock and free-living bird species.

Lemus JA, Fargallo JA, Vergara P, Parejo D, Banda E - PLoS ONE (2010)

Bottom Line: Avian chlamydiosis is a zoonotic disease whose effects have been mainly investigated in humans, poultry and pet birds.We investigated whether gammapathies were associated with Chlamydiaceae infections.In addition, we found kestrels to be infected by Chlamydia suis and Chlamydia muridarum, the first time these have been detected in birds.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain. jlemus@ebd.csic.es

ABSTRACT
The study of cross-species pathogen transmission is essential to understanding the epizootiology and epidemiology of infectious diseases. Avian chlamydiosis is a zoonotic disease whose effects have been mainly investigated in humans, poultry and pet birds. It has been suggested that wild bird species play an important role as reservoirs for this disease. During a comparative health status survey in common (Falco tinnunculus) and lesser (Falco naumanni) kestrel populations in Spain, acute gammapathies were detected. We investigated whether gammapathies were associated with Chlamydiaceae infections. We recorded the prevalence of different Chlamydiaceae species in nestlings of both kestrel species in three different study areas. Chlamydophila psittaci serovar I (or Chlamydophila abortus), an ovine pathogen causing late-term abortions, was isolated from all the nestlings of both kestrel species in one of the three studied areas, a location with extensive ovine livestock enzootic of this atypical bacteria and where gammapathies were recorded. Serovar and genetic cluster analysis of the kestrel isolates from this area showed serovars A and C and the genetic cluster 1 and were different than those isolated from the other two areas. The serovar I in this area was also isolated from sheep abortions, sheep faeces, sheep stable dust, nest dust of both kestrel species, carrion beetles (Silphidae) and Orthoptera. This fact was not observed in other areas. In addition, we found kestrels to be infected by Chlamydia suis and Chlamydia muridarum, the first time these have been detected in birds. Our study evidences a pathogen transmission from ruminants to birds, highlighting the importance of this potential and unexplored mechanism of infection in an ecological context. On the other hand, it is reported a pathogen transmission from livestock to wildlife, revealing new and scarcely investigated anthropogenic threats for wild and endangered species.

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Between-area differences in kestrel gammaglobulin levels.Differences in gammaglobulin levels (percentage of total proteins) between the three study areas for both Eurasian and Lesser kestrels. Interaction between species and study area is statistically significant.
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pone-0013512-g001: Between-area differences in kestrel gammaglobulin levels.Differences in gammaglobulin levels (percentage of total proteins) between the three study areas for both Eurasian and Lesser kestrels. Interaction between species and study area is statistically significant.

Mentions: Protein electrophoresis showed that both kestrel species from LL showed higher levels of γ-globulins than kestrels from CA and LM, being this difference statistically significant (GLMM, F 2,65 = 47.73, P<0.001, Fig. 1). Lesser kestrels showed higher values than common kestrels (GLMM, F 1,65 = 15.47,P<0.001, Fig. 2). This was due to the between-species difference found in LL while no between-species differences were found in CA and LM. This resulted in a significant species x area interaction (GLMM, F 2,65 = 23.89, P<0.001, Fig. 2). In Figure 3 the protein electrophoresis profiles in LL kestrels are represented showing a standard profile and the detected gammapathies.


Natural cross chlamydial infection between livestock and free-living bird species.

Lemus JA, Fargallo JA, Vergara P, Parejo D, Banda E - PLoS ONE (2010)

Between-area differences in kestrel gammaglobulin levels.Differences in gammaglobulin levels (percentage of total proteins) between the three study areas for both Eurasian and Lesser kestrels. Interaction between species and study area is statistically significant.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2957445&req=5

pone-0013512-g001: Between-area differences in kestrel gammaglobulin levels.Differences in gammaglobulin levels (percentage of total proteins) between the three study areas for both Eurasian and Lesser kestrels. Interaction between species and study area is statistically significant.
Mentions: Protein electrophoresis showed that both kestrel species from LL showed higher levels of γ-globulins than kestrels from CA and LM, being this difference statistically significant (GLMM, F 2,65 = 47.73, P<0.001, Fig. 1). Lesser kestrels showed higher values than common kestrels (GLMM, F 1,65 = 15.47,P<0.001, Fig. 2). This was due to the between-species difference found in LL while no between-species differences were found in CA and LM. This resulted in a significant species x area interaction (GLMM, F 2,65 = 23.89, P<0.001, Fig. 2). In Figure 3 the protein electrophoresis profiles in LL kestrels are represented showing a standard profile and the detected gammapathies.

Bottom Line: Avian chlamydiosis is a zoonotic disease whose effects have been mainly investigated in humans, poultry and pet birds.We investigated whether gammapathies were associated with Chlamydiaceae infections.In addition, we found kestrels to be infected by Chlamydia suis and Chlamydia muridarum, the first time these have been detected in birds.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain. jlemus@ebd.csic.es

ABSTRACT
The study of cross-species pathogen transmission is essential to understanding the epizootiology and epidemiology of infectious diseases. Avian chlamydiosis is a zoonotic disease whose effects have been mainly investigated in humans, poultry and pet birds. It has been suggested that wild bird species play an important role as reservoirs for this disease. During a comparative health status survey in common (Falco tinnunculus) and lesser (Falco naumanni) kestrel populations in Spain, acute gammapathies were detected. We investigated whether gammapathies were associated with Chlamydiaceae infections. We recorded the prevalence of different Chlamydiaceae species in nestlings of both kestrel species in three different study areas. Chlamydophila psittaci serovar I (or Chlamydophila abortus), an ovine pathogen causing late-term abortions, was isolated from all the nestlings of both kestrel species in one of the three studied areas, a location with extensive ovine livestock enzootic of this atypical bacteria and where gammapathies were recorded. Serovar and genetic cluster analysis of the kestrel isolates from this area showed serovars A and C and the genetic cluster 1 and were different than those isolated from the other two areas. The serovar I in this area was also isolated from sheep abortions, sheep faeces, sheep stable dust, nest dust of both kestrel species, carrion beetles (Silphidae) and Orthoptera. This fact was not observed in other areas. In addition, we found kestrels to be infected by Chlamydia suis and Chlamydia muridarum, the first time these have been detected in birds. Our study evidences a pathogen transmission from ruminants to birds, highlighting the importance of this potential and unexplored mechanism of infection in an ecological context. On the other hand, it is reported a pathogen transmission from livestock to wildlife, revealing new and scarcely investigated anthropogenic threats for wild and endangered species.

Show MeSH
Related in: MedlinePlus