Presence of C. albidus, C. laurentii and C. uniguttulatus in Crop and Droppings of Pigeon Lofts (Columba livia)

Rosario, Inmaculada; Soro, Gbombélé; Déniz, S.; Ferrer, O.; Acosta, F.; Padilla, Daniel; Acosta, B.

doi:10.1007/s11046-009-9262-0

Cited by 25 publications

(21 citation statements)

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“…Other yeasts, such as Rhodotorula and Trichosporon, can cause blood infections in patients with indwelling central venous catheters and cancer (Cafarchia et al 2006). Several studies have confirmed the role of pigeon in the epidemiology of these opportunistic pathogen agents causing human infection due to inhalation or contact with their dried feces (Andrade-Silva et al 2010, Rosario et al 2010. In the present work, not all isolates of yeasts evidenced by biochemical test were confirmed and/or detected by MALDI TOF MS.…”

Section: Discussioncontrasting

confidence: 45%

Microbiological and parasitological survey of zoonotic agents in apparently healthy feral pigeons

Marenzoni¹,

Morganti²,

Moretta³

et al. 2016

Polish Journal of Veterinary Sciences

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Microbiological and parasitological investigation was carried out on a colony of feral pigeons, located in a green area near the main hospital of a Central Italy city. One hundred pigeons were submitted to clinical examination. Cloacal swabs, grouped in pool of 4 samples, were analyzed to detect the presence of Coxiella burnetii, Chlamydia psittaci, Chlamydophila spp. using a biomolecular procedure, while individual cloacal samples were examined for Salmonella spp., Campylobacter spp., and yeasts by means of a specific culture media. An ELISA test was used to determine the presence of Giardia spp., and Cryptosporidium spp. coproantigens. Individual serological samples were also tested with the modified agglutination test (MAT) in order to detect antibodies against Toxoplasma gondii. The pigeons did not show any clinical signs. The cloacal pools proved to be negative for C. burnetii DNA while three pools were positive for C. psittaci or Chlamydophila spp. DNAs. Salmonella spp. was not detected. C. jejuni and C. coli were found in 13% and 4% of the samples, respectively. No Giardia spp. and Cryptosporidium spp. were detected. Thirty-three out of 100 samples (33%) were positive for yeast colonies. The seroprevalence for T. gondii was 8%. Although with moderate incidence, potentially zoonotic agents were present thus highlighting the need for sanitary surveillance on feral pigeon colonies.

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Section: Discussioncontrasting

confidence: 45%

Microbiological and parasitological survey of zoonotic agents in apparently healthy feral pigeons

Marenzoni¹,

Morganti²,

Moretta³

et al. 2016

Polish Journal of Veterinary Sciences

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“…Thus, pigeons harbouring having thermal‐tolerant yeasts could be a source of continuous spread of these pathogens. However, the survival capability of yeasts in pigeon cloacae is unclear (Littman and Borok 1968; Rosario et al. 2009).…”

Section: Discussionmentioning

confidence: 99%

Prevalence of yeast-like fungi and evaluation of several virulence factors from feral pigeons in Seoul, Korea

Jang

Lee

Lee³

et al. 2011

Letters in Applied Microbiology

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Aims: Studies of pigeon‐borne yeasts have tended to focus on species, such as Cryptococcus neoformans and Candida albicans, with scant attention to feral pigeons in Korea. We studied the prevalence of yeasts from faecal samples of feral pigeons obtained in various public places in Seoul, Korea, and assessed their potential capacity as human pathogens. Methods and Results: Three hundred and six pigeon faeces samples were collected at city squares and parks in 21 localities in Seoul and Seoul Grand Park and analysed for yeast with conventional methods. Of the 306 samples, 126 (41·2%) were positive for yeast. Seventeen species of yeast were identified. The most frequent species were Candida glabrata (34·1%), Candida famata (12·7%), Cryptococcus albidus (14·3%) and Cryptococcus laurentii (7·9%). The yeast isolates were tested for virulence. Of the 116 isolates (ten isolates missing), 70·7% (n = 82) grew at 37°C. All the Cryptococcus spp. isolates possessed a capsule, 16·4% (n = 19) produced melanin, and 33·6% (n = 39) produced proteinase. Two Ca. glabrata, a Ca. famata and Ca. albicans as well as three C. neoformans, a C. laurentii and Ca. albicans isolates had three virulence factors. Accordingly, 29·3% (n = 34) isolates possessed more than two virulence factors except capsule formation. Conclusions: These results of this study indicate that feral pigeons harbour a variety of yeasts and are a reservoir of human pathogenic fungi. Significance and Impact of the Study: This study is the first time about the microflora (fungi) presents in faecal samples collected from a variety of public areas throughout Seoul, Korea.

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“…Currently, most C. laurentii isolates described around the world have been identified by morphological criteria, which can miss subtle differences and misidentify cryptic species [1], [14], [15]. Unlike C. neoformans and C. gattii , few studies have applied DNA sequencing to describe the molecular phylogeny of C. laurentii [11], [16], [17].…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Analysis of Phenotypically Characterized Cryptococcus laurentii Isolates Reveals High Frequency of Cryptic Species

et al. 2014

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BackgroundAlthough Cryptococcus laurentii has been considered saprophytic and its taxonomy is still being described, several cases of human infections have already reported. This study aimed to evaluate molecular aspects of C. laurentii isolates from Brazil, Botswana, Canada, and the United States.MethodsIn this study, 100 phenotypically identified C. laurentii isolates were evaluated by sequencing the 18S nuclear ribosomal small subunit rRNA gene (18S-SSU), D1/D2 region of 28S nuclear ribosomal large subunit rRNA gene (28S-LSU), and the internal transcribed spacer (ITS) of the ribosomal region.ResultsBLAST searches using 550-bp, 650-bp, and 550-bp sequenced amplicons obtained from the 18S-SSU, 28S-LSU, and the ITS region led to the identification of 75 C. laurentii strains that shared 99–100% identity with C. laurentii CBS 139. A total of nine isolates shared 99% identity with both Bullera sp. VY-68 and C. laurentii RY1. One isolate shared 99% identity with Cryptococcus rajasthanensis CBS 10406, and eight isolates shared 100% identity with Cryptococcus sp. APSS 862 according to the 28S-LSU and ITS regions and designated as Cryptococcus aspenensis sp. nov. (CBS 13867). While 16 isolates shared 99% identity with Cryptococcus flavescens CBS 942 according to the 18S-SSU sequence, only six were confirmed using the 28S-LSU and ITS region sequences. The remaining 10 shared 99% identity with Cryptococcus terrestris CBS 10810, which was recently described in Brazil. Through concatenated sequence analyses, seven sequence types in C. laurentii, three in C. flavescens, one in C. terrestris, and one in the C. aspenensis sp. nov. were identified.ConclusionsSequencing permitted the characterization of 75% of the environmental C. laurentii isolates from different geographical areas and the identification of seven haplotypes of this species. Among sequenced regions, the increased variability of the ITS region in comparison to the 18S-SSU and 28S-LSU regions reinforces its applicability as a DNA barcode.

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Presence of C. albidus, C. laurentii and C. uniguttulatus in Crop and Droppings of Pigeon Lofts (Columba livia)

Cited by 25 publications

References 32 publications

Microbiological and parasitological survey of zoonotic agents in apparently healthy feral pigeons

Microbiological and parasitological survey of zoonotic agents in apparently healthy feral pigeons

Prevalence of yeast-like fungi and evaluation of several virulence factors from feral pigeons in Seoul, Korea

Phylogenetic Analysis of Phenotypically Characterized Cryptococcus laurentii Isolates Reveals High Frequency of Cryptic Species

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