Chlamydiosis in farmed chickens in Slovakia  and zoonotic risk for humans

Cechová, L; Halánová, Monika; Babinská, Ingrid; Danišová, Oľga; Bartkovský, Martin; Marcinčák, Slavomí­r; Marcinčáková, Dana; Valenčáková, Alexandra; Čisláková, L.

doi:10.26444/aaem/82948

Cited by 8 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Swabs of the choana detected significantly more Chlamydiaceae-positive birds than cloacal swabs, which is in accordance with studies on farmed chickens, ducks, geese, pigeons, turkeys, and cockatiels [9,40,41]. One study investigating the pathogenicity of different C. psittaci strains in chickens found that the overall pharyngeal excretion was slightly higher than the cloacal excretion and that the intensity of excretion varies depending on the C. psittaci strain involved [42].…”

Section: Swab Typessupporting

confidence: 84%

Occurrence of Chlamydiaceae in Raptors and Crows in Switzerland

et al. 2020

View full text Add to dashboard Cite

Bacteria of the family Chlamydiaceae are globally disseminated and able to infect many bird species. So far, 11 species of Chlamydia have been detected in wild birds, and several studies found chlamydial strains classified as genetically intermediate between Chlamydia (C.) psittaci and C.abortus. Recently, a group of these intermediate strains was shown to form a separate species, i.e., C.buteonis. In the present study, 1128 samples from 341 raptors of 16 bird species and 253 corvids representing six species were examined using a stepwise diagnostic approach. Chlamydiaceae DNA was detected in 23.7% of the corvids and 5.9% of the raptors. In corvids, the most frequently detected Chlamydia species was C.psittaci of outer membrane protein A (ompA) genotype 1V, which is known to have a host preference for corvids. The most frequently detected ompA genotype in raptors was M56. Furthermore, one of the raptors harbored C.psittaci 1V, and two others carried genotype A. C.buteonis was not detected in the bird population investigated, so it remains unknown whether this species occurs in Switzerland. The infection rate of Chlamydiaceae in corvids was high compared to rates reported in other wild bird species, but neither Chlamydiaceae-positive corvids nor raptors showed overt signs of disease. Since the Chlamydiaceae of both, raptors and crows were identified as C.psittaci and all C.psittaci genotypes are considered to be zoonotic, it can be suggested that raptors and crows pose a potential hazard to the health of their handlers.

show abstract

Section: Swab Typessupporting

confidence: 84%

Occurrence of Chlamydiaceae in Raptors and Crows in Switzerland

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Chlamydia is an obligate intracellular gram-negative bacterium, which is widely distributed throughout the world and endangers human health and has a huge economic impact on animal husbandry (Cong et al 2014, Cechova et al 2018. In this study, the overall seropositivity rate for Chlamydia (21%) exposure in poultry (Table 1) is higher than those in Slovakia (6.88%) (Cechova et al 2018), 15.0% in chickens in Italy (Donati et al 2018), and 7.3% in wild birds in Poland (Krawiec et al 2015). However, the rate detected in our study was lower than the rate of 39.67% reported in China (Nie et al 2018).…”

Section: Discussionmentioning

confidence: 99%

A Seroepidemiological Survey of Toxoplasma gondii and Chlamydia Infection in Chickens, Ducks, and Geese in Jilin Province, Northeastern China

Yang

Yin

et al. 2020

Vector-Borne and Zoonotic Diseases

View full text Add to dashboard Cite

Toxoplasma gondii and Chlamydia are common protozoan pathogens, which can pose health risks to people around the world and cause considerable economic losses. Although information on the seroprevalence of T. gondii and Chlamydia in chickens can be found in China, knowledge on the infection of these two diseases in rural chickens, ducks, and geese is limited. Therefore, blood samples from 377 chickens, 268 ducks, and 379 geese were taken from rural areas in seven cities in northeastern China, and their seropositivity was analyzed by the indirect hemagglutination antibody (IHA) test with a cutoff titer of 1:64. The overall seroprevalence of T. gondii and Chlamydia was 10.6% and 21.0%, respectively. Moreover, the free-range poultry (20.75% and 30.55%) have significantly higher seroprevalences than caged poultry (5.47% and 15.66%) (p < 0.001). Moreover, the seroprevalence of T. gondii in older and younger poultry was found to be 5.48% and 12.89%, and those in Chlamydia were 23.53% and 15.16%, respectively. There were significant differences between different ages (p < 0.05). But regarding the prevalence of both, it is not clear in this way which one is the prevalence for younger and older for each specific pathogen. Logistic regression analysis suggested that geography were considered as a risk factor for T. gondii infection in this study. Our study is the first report on the seroprevalence of T. gondii and Chlamydia in poultry in rural areas of Jilin Province, China. These data reflect that T. gondii and Chlamydia are widespread in poultry in northeastern China, leading to a risk of infection in human health. Therefore, the prevention and control of Toxoplasma and Chlamydia infection in poultry, other animals, and humans should be strengthened.

show abstract

“…The present study reports the first detection of different Chlamydia species in gallinaceous birds from commercial and backyard farms in Costa Rica and in Central America. The percentage of positivity observed in pooled samples collected from commercial farms (8.0%) was higher than that reported in Mexico (3.4% (20/526 individual samples)) and Slovakia (6.9% (19/276 individual samples) [9, 13] but lower than that found in commercial poultry farms in Poland (23% (26/113 pooled samples)), Netherlands (49% (74/151 pooled samples)) and Argentina (40.3% (27/67 individual samples)) [7, 25, 26]. Likewise, the percentage of positivity detected in the backyard farms in Costa Rica (28.6%) was higher than that in other countries, such as the United States (13.6% (64/472 pooled samples)), Italy (15% (24/160 individual samples)) and China (24.7% (442/1791 individual samples)) [11, 12, 14], but similar to that recently reported in Mexico (28.6% (83/293 individual samples)) [13].…”

Section: Discussionmentioning

confidence: 70%

“…However, the positivity percentages in the two groups may be underestimated because, on the one hand, the bacterium is excreted intermittently in asymptomatic animals [29] and, on the other hand, birds typically excrete the bacterium through either the pharynx or cloaca and not from both sites [9]. Zoonotic potential should be assumed possible in asymptomatic carriers of C. psittaci even without presence of clinical signs [30] This Germany, Belgium, France, Slovakia, Italy, and China [14] [9], causing economic losses to the poultry industry due to its mandatory reporting [9]. The percentages of infection in all these countries do not exceed 6.9% (Slovakia), in contrast to the percentage obtained in the present study (45.5%).…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization ofChlamydiaspecies in commercial and backyard poultry farms in Costa Rica

Morales

Dolz

2022

Epidemiol. Infect.

View full text Add to dashboard Cite

Conflicts of Interest: None. Availability Statements:The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to restrictions apply to the availability of these data, which were used under license for the current study, and so are not publicly available. Data are however available from the authors upon reasonable request and with permission of [SENASA,

show abstract

Chlamydiosis in farmed chickens in Slovakia and zoonotic risk for humans

Abstract: C. psittaci infections are apparently emerging in chickens. Chicken-processing plant employees should be considered a risk group for human psittacosis. There is a need for higher awareness and for efficient risk assessment and management.

Cited by 8 publications

References 34 publications

Occurrence of Chlamydiaceae in Raptors and Crows in Switzerland

Occurrence of Chlamydiaceae in Raptors and Crows in Switzerland

A Seroepidemiological Survey of Toxoplasma gondii and Chlamydia Infection in Chickens, Ducks, and Geese in Jilin Province, Northeastern China

Molecular characterization ofChlamydiaspecies in commercial and backyard poultry farms in Costa Rica

Contact Info

Product

Resources

About