Publications

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chlamydiosis in birds in great britain. 1. serological reactions to chlamydia in birds sampled between 1974 and 1983.a total of 6593 serum samples from birds, received for diagnostic testing or surveys between 1974 and 1983, were titrated by direct complement fixation (cf) test against chlamydia psittaci antigen. the percentage of positive reactions found was variable for domestic poultry, ranging from 1.5 in chickens to 22.2 in geese, and was highest in pigeons columba livia (47.3) and collared doves streptopelia decaocto (51.4). a moderate incidence was found for game birds (29.0), wild ducks (23.3) and impo ...19863734430
seroprevalence of toxoplasma gondii and chlamydia psittaci in domestic pigeons (columbia livia domestica) at sebele, gaborone, botswana.high antibody titres to toxoplasma gondii and chlamydophila psittaci were demonstrated in serum collected from domestic pigeons at average titres of 1:128 and 1:64 respectively. the public health implications of these findings are discussed.200111585096
wild pigeons and pheasants--a source of chlamydophila psittaci for humans and animals.the authors present results of serological examination in 275 pheasants (phaisanus colchicus) and 273 pigeons (columba livia f. domestica) for the presence of chlamydophila (ch) psittaci igg antibodies. using micromethod of complement fixation (cf) test with genus-specific antigen ch. psittaci (bioveta, ivanovice na hané, czech republic), the seropositivity in pheasants oscillated between 31.5-40.4 %. no clinical signs of chlamydiosis were detected in pheasants under study. the seropositivity in ...200212498596
health status of free-living pigeons (columba livia domestica) in the city of ljubljana.in the year 2000 an epidemiological research was undertaken on the health status of free-living pigeons in the city of ljubljana, slovenia. a total of 139 pigeons were captured and examined for the most common bacterial, viral, and parasitic diseases. serum samples, oropharyngeal and cloacal swabs as well as samples of droppings and feathers were taken from the captured birds. antibodies to paramyxovirus type 1 were found in 84.2% of the sera examined, and 23.7% of birds were serologically posit ...200415168753
survey for haemoproteus spp., trichomonas gallinae, chlamydophila psittaci, and salmonella spp. in galapagos islands columbiformes.endemic free-ranging galapagos doves (zenaida galapagoensis) and introduced rock doves (columba livia) were surveyed in several islands of the galapagos archipelago to establish sample prevalence of hemoparasites, trichomonas gallinae, chlamydophila psittaci, and salmonella species. a haemoproteus sp., the only hemoparasite identified, was found in 89% of the galapagos doves sampled but not in the rock doves. trichomonas gallinae was detected by polymerase chain reaction in 44% of rock doves fro ...200415193075
epidemiological investigation of chlamydophila psittaci in pigeons and free-living birds in croatia.during 2003, 278 adult pigeons (columba livia) and 54 birds of 11 other free-living species were caught in the various locations in the city of zagreb, croatia. sera from 182 pigeons were tested for the presence of antibodies against chlamydophila (c.) psittaci by elisa test and 174 of them (95.6%) were found positive. because of the high positivity rate in sera, cloacal swabs of 278 pigeons as well as 54 other species of free-living birds were tested for the presence of c. psittaci antigen. fou ...200515943062
prevalence of chlamydophila psittaci in fecal droppings from feral pigeons in amsterdam, the netherlands.in many cities, the feral rock dove is an abundant bird species that can harbor chlamydophila psittaci. we determined the prevalence and genotype of c. psittaci in fresh fecal samples from feral pigeons in amsterdam, the netherlands. the prevalence was 7.9% overall (26/331; 95% confidence interval, 5 to 11). ten genotyped pcr-positive samples were all genotype b.200616751560
[detection of some zoonotic agents in the domestic pigeon (columba livia) in the city of chillán, chile].there is an increase in the population of doves (columba livia) as well as their contact with healthy and immunocompromised hosts.200717554438
chlamydial infections in feral pigeons in europe: review of data and focus on public health implications.feral pigeons (columba livia domestica), which thrive in most european towns and cities, are commonly infected with the zoonotic bacterium chlamydophila psittaci, the agent of psittacosis (also known as ornithosis) in humans. a number of surveys carried out over the last thirty years across europe have detected high seropositivity values and high percentages of infection in feral pigeon populations. overall, when considering data from 11 european countries, seropositivity values to c. psittaci i ...200918977610
chlamydophila psittaci and toxoplasma gondii infection in pigeons (columba livia) from são paulo state, brazil.pigeons (columba livia) cohabit with humans in urban and rural areas, representing a public health problem since microorganisms are transmitted through the inhalation of dust from their dry feces (chlamydiosis) and through ingestion of their undercooked or poorly refrigerated meat (toxoplasmosis). this study aimed to evaluate the presence of chlamydophila psittaci and toxoplasma gondii in pigeons from four cities in são paulo state, brazil. c. psittaci was evaluated through hemi-nested polymeras ...201021055877
Impact of urban environment and host phenotype on the epidemiology of Chlamydiaceae in feral pigeons (Columba livia).Chlamydiaceae are obligate intracellular Gram-negative bacteria found all over the world and known to cause various forms of disease in animals and humans. Urban pigeons are known to be an important reservoir of Chlamydia psittaci, the agent of human psittacosis. In this study, we examined the influence of pigeon houses used to regulate pigeon populations and of melanin-based coloration on several epidemiological parameters of Chlamydiaceae in 708 urban pigeons in Paris. We also identified speci ...201121933318
prevalence of chlamydia psittaci in the feral pigeon population of basel, switzerland.feral pigeons (columba livia) are commonly infected with chlamydia psittaci, the agent of psittacosis in humans. to assess the zoonotic risk posed by feral pigeons in the urban environment, we examined the presence of the chlamydia psittaci outer membrane protein a (ompa) gene in pharyngeal and cloacal samples of 202 feral pigeons present in a loft in basel, switzerland. additionally, we examined 620 fresh faecal droppings of feral pigeons at 6 public sites in basel. the ompa gene of c. psittaci ...201121921110
molecular survey on zoonotic tick-borne bacteria and chlamydiae in feral pigeons (columba livia domestica).to determine the presence of zoonotic tick-borne bacteria in feral pigeons (columba livia domestica) from urban areas.201627086148
pcr-based diagnosis, molecular characterization and detection of atypical strains of avian chlamydia psittaci in companion and wild birds.chlamydiosis is one of the most important infectious diseases of birds. in this study, 253 clinical samples were taken from 27 bird species belonging to seven orders. thirty-two (12.6%) samples were positive for chlamydia psittaci major outer membrane gene (ompa) dna by a nested polymerase chain reaction (pcr). twelve nested pcr-positive specimens were typed by ompa gene-based pcr-restricted fragment length polymorphism, using ctu/ctl primers and alui restriction enzyme. four restriction pattern ...201323391180
detection of chlamydia psittaci in feral pigeons (columba livia domestica) in slovakia and their characterisation.chlamydia psittaci, an obligate intracellular bacterium, which is the etiologic agent of avian chlamydiosis in birds and ornithosis/psittacosis in humans, has been reported to be one of the most common pathogens found in feral pigeons worldwide, and thus constitutes a zoonotic risk. the aim of the study was to investigate pigeons in slovakia living in areas in close proximity to humans for the presence of c. psittaci, using pharyngeal and cloacal swabs.201627007521
wild-pigeon-related psittacosis in a family.three members of a family acquired psittacosis after exposure to a wild pigeon. each of the patients had pulmonary infiltrates, prominent headache, abdominal complaints, and serologic evidence for infection with chlamydia psittaci. of 759 cases of psittacosis reported to the centers for disease control for the period of 1974 to 1981, some 75 (10 percent) were associated with pigeons. fifty-two of the cases were associated with domestic pigeons and 23 with wild pigeons. pigeons represent a largel ...19863769573
screening for several potential pathogens in feral pigeons (columba livia) in madrid.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.201020569487
epidemiology of chlamydia psittaci infection in racing pigeons and pigeon fanciers in beijing, china.over 3 million racing pigeons (columba livia) are registered in beijing city center for gambling purposes. during 2008-2010, we evaluated the occurrence and prevalence of chlamydia psittaci in racing pigeons as well as the possible zoonotic transmission to pigeon fanciers in six districts of beijing where pigeon races are particularly popular. c. psittaci-specific serum antibody titres were obtained from 370 pigeons and 79 fanciers using enzyme-linked immunosorbent assay. in addition, 206 and 67 ...201525244602
[efficacy of doxycycline for treatment of chlamydiosis in flocks of racing and fancy pigeons].evaluation of the clinical efficacy of doxycycline application via drinking water in the treatment of chlamydiosis in infected, clinically ill flocks of racing and fancy pigeons (columba livia f. domestica) under field conditions.201324326879
seroprevalence of chlamydia psittaci infection in market-sold adult chickens, ducks and pigeons in north-western china.chlamydia psittaci, the agent of psittacosis in humans, infects a wide range of avian species. to assess the risk of psittacosis posed by domestic birds in the urban environment, the prevalence of c. psittaci antibodies in 413 chickens (gallus domesticus; 305 caged and 108 free-range), 334 ducks (anas spp.; 111 caged and 223 free-range) and 312 pigeons (columba livia) in lanzhou, north-western china, was detected using the indirect haemagglutination assay. the specific antibodies were found in s ...201323699067
chlamydia psittaci genotype b in a pigeon (columba livia) inhabiting a public place in san josé, costa rica.human chlamydiosis is a zoonotic disease of avian origin caused by chlamydia psittaci. the highest infection rates have been detected in parrots (psittacidae) and pigeons (columbiformes), the latter most frequently carry the genotypes b and e. these genotypes have been shown to also infect humans. because pigeons (columba livia) cohabit with humans in urban areas, c. psittaci present in the dust from dry feces of infected pigeons may be transmitted by inhalation and represent a significant publi ...201326623327
determination of the inhibitory concentration 50% (ic50) of four selected drugs (chlortetracycline, doxycycline, enrofloxacin and difloxacin) that reduce in vitro the multiplication of chlamydophila psittaci.a total of 18 chlamydial isolates from various psittacine birds, one isolate from a domestic pigeon and one isolate from a pekin duck were isolated in continuous buffalo green monkey (bgm) kidney cell cultures. all 20 isolates were identified by nested multiplex polymerase chain reaction as chlamydophila psittaci. these isolates were multiplied to high titres and subsequently tested for in vitro sensitivity against two tetracyclines (chlortetracycline and doxycycline) and two quinolones (enroflo ...200617147151
detection and characterization of chlamydophila psittaci in asymptomatic feral pigeons (columba livia domestica) in central thailand.to detect and characterize chlamydophila psittaci (c. psittaci) in asymptomatic feral pigeons in central thailand.201525902021
the prevalence and genetic characterization of chlamydia psittaci from domestic and feral pigeons in poland and the correlation between infection rate and incidence of pigeon circovirus.chlamydiosis is a zoonotic disease caused by chlamydia psittaci that occurs in a wide range of bird species. high infection rates with c. psittaci are found in pigeons, which can act as vectors transmitting this bacterium to poultry and humans. chlamydia shedding by pigeons is intermittent and can be activated by stressors or immunosuppression. the most common immunosuppressive factor for pigeons is a pigeon circovirus (picv) infection. the main aim of the study was to evaluate the prevalence of ...201425306457
transmission of antibodies to chlamydia psittaci and coxiella burnetii through eggs and "crop milk" in pigeons.young semi-domesticated pigeons captured or hatched from eggs gathered in bratislava during 1989-1991 were examined for complement fixing antibodies to chlamydia psittaci and agglutinating antibodies to coxiella burnetii. antibodies to ch. psittaci were present in 76% of birds younger than 24 h, in 47.7% between 1 and 10 days of age and in 12% of nestlings over 10 days old. antibodies to ch. psittaci were also detected in "crop milk" of 4.1% of 1 to 10 day old birds and in 4.5% of specimens olde ...19938519359
antibody prevalence and isolation of chlamydia psittaci from pigeons (columba livia).the isolation of chlamydia psittaci and serological detection of chlamydia-specific antibodies in racing pigeons and pigeons from public parks is described. several serological methods (complement fixation test, indirect microimmunofluorescence test, and enzyme-linked immunosorbent assay) were compared with bacteriological techniques (isolation both in embryonated eggs and mccoy cell monolayers). tests confirmed that 28.6%, 33.5%, and 35.9% of the pigeons, respectively, were seropositive by the ...19938363515
zoonotic agents in feral pigeons (columba livia) from costa rica: possible improvements to diminish contagion risks.most studies on zoonotic agents in pigeons have been conducted in the palearctic region, but the scarcity of data is notorious in the neotropical region, where these birds can breed all year around and are in close contact with humans. in this study, we used a combination of culture-dependent and culture-independent methods to identify infectious agents in 141 fecal samples from pigeons collected at four urban parks from costa rica. of these we identified 34 positive samples for salmonella enter ...201829243991
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