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Article

A One Health Approach Molecular Analysis of Staphylococcus aureus Reveals Distinct Lineages in Isolates from Miranda Donkeys (Equus asinus) and Their Handlers

1
Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
2
Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
3
Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
4
Associated Laboratory for Green Chemistry (LAQV@REQUIMTE), University NOVA of Lisboa, 2825-466 Lisbon, Portugal
5
National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections (NRL-AMR/HAI), Department of Infectious Diseases, National Institute of Health Dr Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
6
Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, Oporto University, 4051-401 Oporto, Portugal
7
AEPGA, Association for the Study and Protection of Asinines, Atenor, 5225-011 Miranda do Douro, Portugal
8
BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, NOVA University of Lisbon, 2825-466 Almada, Portugal
9
Proteomass Scientific Society, 2825-466 Almada, Portugal
10
CECAV—Veterinary and Animal Research Centre, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
11
Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Antibiotics 2022, 11(3), 374; https://doi.org/10.3390/antibiotics11030374
Submission received: 31 January 2022 / Revised: 24 February 2022 / Accepted: 4 March 2022 / Published: 10 March 2022
(This article belongs to the Special Issue Antibiotics and Alternative Treatments in Zoonosis Therapy)

Abstract

:
Donkeys (Equus asinus) are in decline in Europe. Occupational exposure to farm animals has been associated with increased staphylococci carriage. We aimed to isolate S. aureus and coagulase-negative staphylococci (CoNS) from donkeys and handlers and characterize the antimicrobial resistance profiles and genetic lineages of S. aureus strains. Oral and nasal swab samples were collected from 49 Miranda donkeys and 23 handlers from 15 different farms. Staphylococci species were identified by MALDI-TOF MS. The presence of antimicrobial resistance genes and virulence factors was investigated by PCR. Molecular typing was performed in S. aureus isolates. From the 49 donkey samples, 4 S. aureus (8.2%) and 21 CoNS (42.9%) were isolated. Ten handlers (43.5%) were carriers of S. aureus and 4 (17.4%) carried CoNS. The CoNS isolates showed resistance to several classes of antimicrobials encoded by the mecA, aph (3′)-IIIa, ant (4′)-Ia, tetM, tetK, lnuA, ermB, ermC, dfrA and dfrG genes. S. aureus isolates were resistant to penicillin, aminoglicosides and tetracycline harboring the blaZ, aph (3′)-IIIa, tetL, tetM and tetK genes. All S. aureus isolates from donkeys belonged to ST49 and spa-type t208 while the strains isolated from the handlers were ascribed to 3 STs and 7 spa-types. However, human isolates were from different STs than the donkey isolates. Donkeys are mainly colonized by methicillin-resistant S. sciuri. S. aureus transmission between donkeys and their handlers appears not to have occurred since the isolates belonged to different genetic lineages.

1. Introduction

Staphylococcus spp. are widely disseminated worldwide and have been isolated from human infections, community humans, pets, livestock, wild animals and the natural environment [1]. Both Staphylococcus aureus and coagulase-negative staphylococci (CoNS) are commensal bacteria that colonize the skin and mucosa of humans and animals [2]. Nevertheless, staphylococci are opportunist pathogens that are responsible for a wide-range of infections, including skin and soft-tissue infection, septicemia and endocarditis [3]. Staphylococci, particularly S. aureus, have the ability to easily acquire antimicrobial resistance determinants [4]. Methicillin resistance in staphylococci is conferred by the acquisition of the mec genes (mecA, mecB or mecC), which are carried by the staphylococcal cassette chromosome mec (SCCmec) [5]. Methicillin-resistant S. aureus (MRSA) are usually associated with complicated infections representing a public health concern [6]. It is considered that the mecA gene may have originated from some species of CoNS since homologues of this gene have been found in the S. sciuri group species [4]. CoNS carrying the mecA gene may act as potential donors leading to the emergence of methicillin-resistant S. aureus (MRSA) clones [7].
Animals can be a source of staphylococci zoonotic infections, particularly the clones that possess no host specificity [2]. It has also been demonstrated that the close contact between animals and humans can facilitate the transmission of pathogens. Staphylococci transmission events have been documented mainly between pets and owners and livestock and their handlers [8,9]. Molecular typing techniques, such as multilocus sequence typing (MLST), have provided information on the evolution of human and animal strains and shown that humans were the main hosts of S. aureus, but due to the occurrence of transmission it had acquired the ability to infect animals [10]. The frequent human-to-animal transmission eventually led to specific strain lineages adapting to new animal hosts [10,11]. MLST analysis showed that some sequence types (STs) and clonal complexes (CCs) are predominant in animal S. aureus, such as CC398, CC9, CC1, CC97, CC133 and CC121, and others are prevalent in human S. aureus (CC1, CC5, CC8, CC12, CC15, CC22, CC25, CC30, CC45 and CC51) [10]. The emergence of S. aureus and CoNS in equines, including horses, donkeys and mules, has been demonstrated [12,13,14]. The frequency of S. aureus colonization in horses ranges from 4% to 39% in Europe and CC8, CC22 or CC398 are the most common lineages identified [12,15,16]. Nevertheless, although studies reporting staphylococci in horses are common, studies in healthy donkeys are still very scarce [13].
The donkey population has been decreasing since 1970 but lately this trend has reversed, and it is estimated that the donkey population is 4.3 million globally [17]. In Europe, donkeys are mainly found in Portugal, Spain, Italy and Greece. Miranda donkey is a native Portuguese donkey breed that originated from the Trás-os-Montes region [18]. Donkeys played an important role in maintaining rural communities and sustainable farming practices. However, more recently, these animals began to be used as companion animals and in therapeutic activities and ecotourism [11]. Therefore, we aimed to study the prevalence of S. aureus and CoNS in healthy donkeys and their handlers as well as the antimicrobial resistance and genetic lineages of the isolates in order to investigate a possible human-to-animal transmission or vice-versa.

2. Results

2.1. Characterization of S. aureus Isolates

In this study, 49 and 23 swab samples were collected from Miranda donkeys and handlers, respectively. Staphylococci were recovered from all 15 farms sampled. S. aureus were isolated from 10 farms while CoNS were isolated from 8 farms. From the 49 donkey samples, 4 S. aureus were identified while 10 S. aureus were isolated from handlers’ samples. However, no MRSA has been identified. Three donkeys colonized by S. aureus were from the same farm and their ages ranged from 3 to 8 years (Supplementary Materials Table S1). However, none of these donkeys’ handlers were S. aureus carriers. All S. aureus from donkeys belonging to the same farm (isolates VS3111, VS3113 and VS3114) had resistance to penicillin and kanamycin conferred by the blaZ and aph (3′)-IIIa genes (Table 1). Furthermore, all 3 isolates were ascribed to ST49, spa-type t208 and agr type II. The S. aureus isolated from the remaining donkey showed resistance to aminoglycosides and tetracycline and carried the aph (3′)-IIIa and tetK genes. Yet, these isolates also belonged to ST49, t208 and agr II. Regarding the virulence genes, all four isolates harbored the hla, hlb and hld genes with the exception of isolate VS3111, which also carried the tst gene.
The 10 S. aureus isolated from handlers had similar resistance patterns, showing resistance to penicillin, aminoglycosides, tetracycline and fusidic acid. The isolates carried the blaZ, aph (3′)-IIIa, tetL and tetM genes. S. aureus isolated from handlers carried the hla (n = 10), hlb (n = 7), hld (n = 10), eta (n = 3) and tst (n = 4) virulence genes. Isolates VS3101 and VS3102 also carried the scn and sak genes of the immune evasion cluster (IEC) system and were ascribed to type E. Both isolates were ascribed to ST1290 (CC1), spa-type t131 and agr I. Moreover, these isolates belonged to two handlers working at the same farm. Six isolates were ascribed to ST30 (CC30) and agr III. However, these isolates were distributed over four different spa-types. Finally, two isolates belonged to ST398 (CC398) and spa-types t571 and t011.

2.2. Characterization of CoNS Isolates

Donkey and handler samples were also screened for the presence of methicillin-resistant CoNS (MRCoNS). Only four (17.4%) handlers carried MRCoNS, these being 3 S. epidermidis and one S. sciuri (Table 2). Out of the 49 donkeys, 21 (42.9%) were colonized by CoNS including S. sciuri (n = 17), S. lentus (n = 2), S. xylosus and S. vitulinus. Two S. epidermidis were multidrug-resistant since they were resistant to four classes of antimicrobials. They were resistant to penicillin, aminoglycosides, erythromycin, tetracycline and trimethoprim/sulfamethoxazole and harbored the blaZ, aac (6′)-Ie-aph (2″)-Ia, aph (3′)-IIIa, ermC, dfrA and dfrG genes. The only S. sciuri isolated from one handler showed resistance penicillin, cefoxitin and clindamycin and harbored the mecA and lnuA genes. Even though all CoNS were isolated from ORSAB medium supplemented with 2.5 mg/L of oxacillin, two S. epidermidis, one S. lentus and one S. xylosus isolates lacked the mecA gene. All the remaining isolates caried the mecA gene even those showing phenotypic susceptibility to all antimicrobials tested (n = 7). One S. lentus isolate also displayed a multidrug-resistant phenotype with resistances to penicillin, ciprofloxacin, macrolides and licosamides conferred by the mecA, blaZ and lnuA genes. S. sciuri isolates showed a variety of resistances encoded by optrA, aph (3′)-IIIa, ant (4′)-Ia, str, ermB, tetK and tetM. Finally, only four CoNS carried virulence genes: two eta, one tst and one hla.

3. Discussion

In this study we collected oral and nasal swab samples from 49 Miranda donkeys and 23 handlers to investigate the frequency of staphylococci in donkeys and a possible transmission between animals and humans due to the close proximity. It has been shown that the close contact between pets and humans offers favorable conditions for transmission by direct contact [19]. In our study, S. aureus were isolated from 4 (8.2%) donkeys and 10 (43.5%) handlers among the 49 and 23 donkeys and handlers’ samples, respectively, and were further characterized by molecular typing in order to investigate a possible transmission. Studies reporting the infection or colonization of donkeys by S. aureus are very scarce. Nevertheless, one study conducted with nasal samples of healthy donkeys and another with conjunctival swabs reported a frequency of S. aureus of 50% and 47.8%, respectively [13,20]. Another study investigated the occurrence of S. aureus in healthy donkeys and donkeys with respiratory tract disease and reported an incidence of 13.2% [21]. As for handlers, the proportion of samples that were positive for S. aureus is in line with the normal frequency of human colonization, which is approximately 30% [22]. S. aureus from donkeys were ascribed to the same clonal lineage while S. aureus isolates from handlers belonged to several different lineages. All S. aureus isolated from donkeys belonged to ST49, spa-type t208 and agr II, which was a clonal lineage distinct from those found in humans. Furthermore, no S. aureus was isolated from handlers of those donkeys. In fact, isolates from humans were from different STs than the ones from donkeys. Three donkeys were from the same farm and all isolates presented the same resistance phenotype and genotype, which suggests a possible animal-to-animal transmission. One S. aureus was isolated from a donkey living in a different farm. Gharsa et al. conducted a study on S. aureus from donkeys destined to food consumption in Tunisia and reported a wider diversity of clones with ST133 as the main lineage (present in 44% of the isolates) which is frequently found in ruminants [13]. Little et al. studied the occurrence of S. aureus in diseased equines, including six donkeys, and isolated two S. aureus from donkeys which were ascribed to ST8-t064 and ST398-t011 [12]. S. aureus ST49-t208 has been widely reported as a cause of infection in European red squirrels [23,24,25] and it has also been found in wild rodents [26] and in pigs [27]. In Portugal, this particular clonal lineage has been reported in surface waters and as the dominant clone in wild night raptors [28,29]. Therefore, it seems that S. aureus ST49-t208 lacks host specificity, but it is associated with animals. Although studies reporting S. aureus in donkeys are rare, studies conducted with horses showed that the most common lineages in Europe are ST1, ST254, ST22 and ST398 [30]. Regarding the human S. aureus strains isolated from donkey handlers, two isolates were ascribed to ST1290, t131 and agr I and carried the same antimicrobial and virulence genes. Both strains were isolated from handlers from the same farm, which may suggest a possible human-to-human transmission. Furthermore, both isolates carried the IEC system genes (ascribed to type E), which indicates a human origin since the adaptation of human strains to animals required genome alterations including the loss of elements that contain the IEC [31]. S. aureus ST1290-t131 was first reported to be associated with community-acquired MRSA and it has also been reported among vancomycin-intermediate S. aureus from bloodstream infection and wild rodents from Portugal [32,33,34]. Most S. aureus isolates from handlers were ascribed to ST30 and agr III which, in turn, belonged to four different spa-types (t021, t338, t012 and t1642). S. aureus ST30 is primarily associated with human colonization and infection but it has spread to pets and farm animals [35]. S. aureus CC30 is associated with the carriage of the virulence genes PVL and tst [36,37]. In our study, four of the six ST30 S. aureus carried the tst gene but all were negative for the gene encoding PVL. Finally, two handlers’ S. aureus isolates belonged to ST398 (CC398) and spa-types t571 and t011. S. aureus ST398 is a lineage initially described as colonizing livestock pigs and later other farm animals, such as poultry, horses, cows and veal calves, and it has also been described as colonizing humans [38,39,40,41]. Most ST398 found among humans are associated with methicillin-susceptible S. aureus, whereas in animals ST398 is more often found linked to MRSA strains [42,43]. Furthermore, most ST398 S. aureus isolated from humans belong to spa-type t571 while t011 is more predominant in animals [43]. In fact, in our study, the ST398-t011 isolate was resistant to tetracycline carrying the tetL and tetM genes and according to other studies tetracycline-resistance may be a phenotypic marker of animal-associated ST398 [44]. By contrast, the ST398-t571 isolate not only lacked tetracycline resistance but it was also susceptible to all antimicrobials tested. Some of the donkey handlers tested in this study live off agriculture and it is very likely that they have more farm animals; the detection of a tetracycline-resistant ST398-t011 S. aureus may thus have actually resulted from an animal-to-human transmission.
MRCoNS were detected in almost half of the donkeys (42.9%) and in four (17.4%) handlers. Although studies showing the frequency of S. aureus in donkeys are scarce, studies of CoNS are even rarer. Moreover, the few studies conducted with donkeys focused on non-S. aureus staphylococci and determined only one species, mainly S. pseudintermedius [45,46]. Foti et al. described the bacterial flora present in the normal conjunctiva of donkeys and detected four species of CoNS species including S. xylosus (n = 22), S. chromogenes (n = 4), S. cohnii (n = 2) and S. lentus (n = 2) [20]. In the same study, CoNS were more frequent than S. aureus, which is in accordance with our results [20]. In a study by Gutema et al., CoNS were isolated from 9.2% of healthy donkeys and 10.6% of donkeys with respiratory problems [21]. However, in that study, the CoNS species were not identified. S. sciuri was the most prevalent species among donkeys. S. sciuri and S. lentus were also among the most frequently detected CoNS species in horses [47,48,49,50,51]. However, other studies report other species of CoNS as the most common in horses such as S. capitis and S. equorum [14,52]. S. lentus is commonly detected among farm animals [53]. Staphylococci from the S. sciuri group (S. sciuri, S. lentus, S. xylosus) are commensal bacteria of the skin and mucous membranes of different animal species and are known to have a broad host range [48]. Nevertheless, they are occasionally responsible for opportunistic infections both in animals and humans [54,55,56]. All S. sciuri isolates carried the mecA gene, including the strain isolated from one handler, as previously reported among equine staphylococcal isolates, which was not a surprise since it had been hypothesized that S. sciuri may be the evolutionary precursor of the mecA gene [4,52,57]. One handler was colonized by S. sciuri and one of their donkeys (VS3127) was also a carrier of S. sciuri. Transmission of S. sciuri strains between horses and their handlers have been previously documented [58]. Three handlers were colonized by S. epidermidis, which are one of the most common members of the healthy cutaneous microbiome both in humans and animals [59,60]. However, two S. epidermidis isolates were multidrug-resistant. Furthermore, although S. epidermidis possesses fewer virulence factors than S. aureus, two of the isolates carried virulence genes [61]. eta is an exfoliative toxin and was detected in two CoNS isolates—one S. epidermidis and one multidrug-resistant S. sciuri—and it has been previously reported in different staphylococcal species [62,63]. The S. sciuri isolate carrying the eta gene was also the only isolate showing resistance to linezolid conferred by the optrA gene. This gene was first found in enterococci in China, and later in S. sciuri isolated from pigs [64,65,66]. By contrast to cfr, which also confers resistance to linezolid and other antimicrobial classes, optrA only confers resistance to oxazolidinones [64].

4. Materials and Methods

4.1. Sample Collection and Bacterial Isolates

Oral and nasal swab samples (one swab per animal/handler) were collected from 49 Miranda donkeys (Equus asinus) and 23 handlers from October 2019 to January 2020 in collaboration with the Association for the Study and Protection of Donkey Cattle (Associação para o Estudo e Proteção do Gado Asinino—AEPGA). Donkeys were housed in 15 different farms. The number of samples collected in each farm are shown in Table S1. The 49 donkeys consisted of 12 males and 37 females and ranging in age from 4 months to 21 years, with a median age of 8 years (Table S1). The handlers consisted of 13 men and 10 women with a median age of 54 years. All samples were correctly identified and sent to the laboratory within a maximum of 2 days after being collected. The swabs were inserted into tubes containing brain heart infusion (BHI) broth with 6.5% of NaCl and incubated at 37 °C for 24 h. Then, 100 µL of inoculum was seeded onto Baird–Parker agar and oxacillin resistance screening agar base (ORSAB) plates for the isolation of S. aureus and methicillin-resistant staphylococci. Baird–Parker plates were incubated at 37 °C for 24 h whereas ORSAB plates were incubated for 24 to 48 h. One colony was recovered from each plate. The isolate species were identified by matrix-assisted laser desorption/ionisation–time of flight mass spectrometry (MALDI-TOF MS).

4.2. Phenotypic Antimicrobial Resistance and Susceptibility

The resistance phenotype of each of the isolates was established by the Kirby–Bauer disk diffusion method. The susceptibility of the isolates was tested against 14 antimicrobial agents according to the standards of the European Committee on Antimicrobial Susceptibility Testing (EUCAST, 2018) [67] with the exception of kanamycin, which followed the American Guidelines of the Clinical & Laboratory Standards Institute (CLSI 2017) [68] at the following concentrations per disk: penicillin 1 U, cefoxitin 30 μg, tetracycline 30 μg, linezolid 10 μg, timetroprim/sulfamethoxazole 1.25/23.75 μg, ciprofloxacin 5 μg, erythromycin 15 μg, clindamycin 5 μg, gentamicin 10 μg, tobramycin 10 μg, chloramphenicol, 30 μg, fusidic acid 10 μg, kanamycin 30 μg and mupirocin 200 µg. S. aureus strain ATCC 25,923 was used as quality control in the susceptibility assays.

4.3. Detection of Antimicrobial and Virulence Genes

According to the phenotypic resistance of each isolate, the following antimicrobial resistance genes were studied by PCR: ß-lactams (blaZ and mecA), macrolides and lincosamides (ermA, ermB, ermC, ermT, msr (A/B), mphC, lnuA, lnuB, vgaA and vgaB), tetracycline (tetM, tetK, tetL and tetO), aminoglycosides (aac (6′)-Ie-aph (2″)-Ia, ant (4′)-Ia, aph (3′)-IIIa and str), trimethoprim/sulfamethoxazole (dfrA, dfrG, dfrK and dfrD) and fusidic acid (fusA, fusB, fusC and fusD) [69].
The presence of hla, hlb, hld, lukF/lukS-PV, eta, etb and tst genes encoding for virulence factors such as hemolysins, Panton–Valentine leucocidin, exfoliatins and toxic shock syndrome toxin were investigated by PCR [69]. In addition, the presence of the IEC was also evaluated, first by investigating the presence of scn gene and then, in positive isolates, the presence of the other IEC genes (chp, sak, sea and sep) to determine the IEC group [70]. Positive and negative controls used in all experiments belonged to the strain collection of the University of Trás-os-Montes and Alto Douro.

4.4. Molecular Typing

All S. aureus isolates were typed by multilocus sequence typing (MLST) based on seven housekeeping genes (arcC, aroE, glpF, gmK, pta, tpiA and yqiL) as described by Enright et al. [71]. Each isolate was assigned to a ST and then to a CC according to the MLST database (http://www.mlst.net/, accessed on 14 December 2021). The isolates were also typed by spa-typing described by Harmsen et al. [72]. PCR products were subjected to DNA sequencing and the isolates were assigned to the specific spa types according to the Ridom SpaServer database (http://www.spaserver.ridom.de, accessed on 13 December 2021). Finally, agr typing was also performed in all S. aureus strains as previously described [73].

5. Conclusions

S. aureus was detected in 8% of the donkeys screened. However, colonization with different species of MRCoNS isolates with multidrug resistance were detected. S. aureus transmission between donkeys and their handlers appears not to have occurred since the clonal types of S. aureus isolates were distinct from each other. Furthermore, most S. aureus clones isolated from handlers were associated with human origin except for one CC398 isolate harboring resistance to tetracycline.

Supplementary Materials

The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/antibiotics11030374/s1, Table S1: Description of donkeys and handlers’ samples, farms, sampling locations and staphylococci recovery.

Author Contributions

Conceptualization, V.S. and P.P.; methodology, V.S. and V.M.; validation, M.C. and P.P.; investigation, V.S. and C.A.; resources, M.N., B.L. and M.K.; data curation, V.S.; writing—original draft preparation, V.S.; writing—review and editing, V.S.; supervision, J.L.C., G.I. and P.P.; funding acquisition, P.P. All authors have read and agreed to the published version of the manuscript.

Funding

This work was funded by the R&D Project CAREBIO2: Comparative assessment of antimicrobial resistance in environmental biofilms through proteomics—towards innovative theranostic biomarkers, with reference NORTE-01-0145-FEDER-030101 and PTDC/SAU-INF/30101/2017, financed by the European Regional Development Fund (ERDF) through the Northern Regional Operational Program (NORTE 2020) and the Foundation for Science and Technology (FCT). This work was supported by the Associate Laboratory for Green Chemistry-LAQV, which is financed by national funds from FCT/MCTES (UIDB/50006/2020 and UIDP/50006/2020) and by the projects UIDB/CVT/00772/2020 and LA/P/0059/2020 funded by the Portuguese Foundation for Science and Technology (FCT). Vanessa Silva is grateful to FCT (Fundacão para a Ciência e a Tecnologia) for financial support through the PhD grant SFRH/BD/137947/2018.

Institutional Review Board Statement

The study was conducted according to the Helsinki Declaration (ICH-GCP principles), in compliance with Schedule Y/ICMR Guidelines, the Oviedo Convention, and was approved by the Ethics Committee of University of Trás-os-Montes e Alto Douro (EC-UTAD, 8 November 2019).

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.

Conflicts of Interest

The authors declare no conflict of interest.

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Table 1. Genetic characterization and molecular typing of S. aureus strains recovered from donkeys and their handlers.
Table 1. Genetic characterization and molecular typing of S. aureus strains recovered from donkeys and their handlers.
IsolateSourceAntimicrobial ResistanceVirulence FactorsMolecular Typing
PhenotypeGenotypeIEC TypeOther GenesST (CC)spaagr
VS3101HumanPEN, CN, TOB, KANblaZ, aph (3′)-IIIaEhla, hld, eta1290 (1)t131I
VS3102HumanPEN, CN, TOB, KANblaZ, aph (3′)-IIIaEhla, hld, eta1290 (1)t131I
VS3103HumanPEN, CN, TOB, KANblaZ, aph (3′)-IIIa hla, hlb, hld, tst30 (30)t021III
VS3104HumanPEN, FDblaZ hla, hlb, hld, tst30 (30)t338III
VS3105HumanPEN, CN, KANblaZ, aph (3′)-IIIa hla, hlb, hld, tst30 (30)t012III
VS3106HumanPEN, CN, KANblaZ, aph (3′)-IIIa hla, hlb, hld, tst30 (30)t012III
VS3107HumanPEN, FDblaZ hla, hld30 (30)t1642III
VS3108HumanPEN, CN, KANblaZ, aph (3′)-IIIa hla, hlb, hld30 (30)t1642III
VS3109HumanSusceptible hla, hlb, hld, eta398 (398)t571I
VS3110HumanPEN, CN, TOB, KAN, TETblaZ, aph (3′)-IIIa, tetL, tetM hla, hlb, hld398 (398)t011I
VS3111DonkeyPEN, KANblaZ, aph (3′)-IIIa hla, hlb, hld, tst49t208II
VS3112DonkeyCN, KAN, TETaph (3′)-IIIa, tetK hla, hlb, hld49t208II
VS3113DonkeyPEN, KANblaZ, aph (3′)-IIIa hla, hlb, hld49t208II
VS3114DonkeyPEN, KANblaZ, aph (3′)-IIIa hla, hlb, hld49t208II
Abbreviations. PEN: penicillin; CN: gentamicin; TOB: tobramycin; KAN: kamaycin; TET: tetracycline; FD: fusidic acid; ST: sequence type; CC: clonal complex.
Table 2. Diversity, antimicrobial resistance and virulence of CoNS isolated from donkeys and handlers.
Table 2. Diversity, antimicrobial resistance and virulence of CoNS isolated from donkeys and handlers.
IsolateSource/SpeciesAntimicrobial ResistanceVirulence
Factors
PhenotypeGenotype
VS3115Human/S. epidermidisPEN, CN, TOB, KAN, TET, SXTblaZ, aac (6′)-Ie-aph(2″)-Ia, aph (3′)-IIIa, dfrA
VS3116Human/S. epidermidisPEN, CN, KAN, ERY, SXTmecA, ermC, aac (6′)-Ie-aph (2″)-Ia, aph (3′)-IIIa, dfrA, dfrGtst
VS3117Human/S. epidermidisPEN, FD-eta
VS3118Human/S. sciuriPEN, FOX, CD, FDmecA, lnuA
VS3119Donkey/S. lentusFD-
VS3120Donkey/S. lentusPEN, CIP, ERY, CD, TET, FDmecA, blaZ, lnuA
VS3121Donkey/S. xylosusTET-
VS3122Donkey/S. vitulinusPEN, TETmecA
VS3123Donkey/S. sciuriPEN, CD, FDmecA
VS3124Donkey/S. sciuriPEN, FDmecA
VS3125Donkey/S. sciuriPEN, FOX, TOB, KANmecA, aph (3′)-IIIa
VS3126Donkey/S. sciuriPEN, FOX, LNZ, ERY, CN, TOB, KANmecA, optrA, ermB, aph (3′)-IIIaeta
VS3127Donkey/S. sciuriPEN, FOX, CD, FDmecA
VS3128Donkey/S. sciuriPEN, CN, FDmecA, aph (3′)-IIIa
VS3129Donkey/S. sciuriPEN, CN, TOB, KAN, FDmecA, aph (3′)-IIIa, ant (4′)-Ia, str
VS3130Donkey/S. sciuriPENmecA
VS3131Donkey/S. sciuriPENmecA
VS3132Donkey/S. sciuriPENmecA
VS3133Donkey/S. sciuriPENmecA
VS3134Donkey/S. sciuriPENmecA
VS3135Donkey/S. sciuriPENmecAhla
VS3136Donkey/S. sciuriPEN, TETmecA, tetK
VS3137Donkey/S. sciuriPENmecA
VS3138Donkey/S. sciuriPEN, KAN, TOB, TETmecA, aph (3′)-IIIa, ant (4′)-Ia, str, tetM
VS3139Donkey/S. sciuriPEN, CD, FDmecA
Abbreviations. PEN: penicillin; FOX: cefoxitin; LNZ: linezolid; CIP: ciprofloxacin; CN: gentamycin; TOB: tobramycin; KAN: kanamycin; ERY: erythromycin; CD: clindamycin; TET: tetracycline; FD, fusidic acid; SXT: trimethoprim-sulfamethoxazole.
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Silva, V.; Alfarela, C.; Caniça, M.; Manageiro, V.; Nóvoa, M.; Leiva, B.; Kress, M.; Capelo, J.L.; Poeta, P.; Igrejas, G. A One Health Approach Molecular Analysis of Staphylococcus aureus Reveals Distinct Lineages in Isolates from Miranda Donkeys (Equus asinus) and Their Handlers. Antibiotics 2022, 11, 374. https://doi.org/10.3390/antibiotics11030374

AMA Style

Silva V, Alfarela C, Caniça M, Manageiro V, Nóvoa M, Leiva B, Kress M, Capelo JL, Poeta P, Igrejas G. A One Health Approach Molecular Analysis of Staphylococcus aureus Reveals Distinct Lineages in Isolates from Miranda Donkeys (Equus asinus) and Their Handlers. Antibiotics. 2022; 11(3):374. https://doi.org/10.3390/antibiotics11030374

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Silva, Vanessa, Cláudia Alfarela, Manuela Caniça, Vera Manageiro, Miguel Nóvoa, Belen Leiva, Maria Kress, José Luís Capelo, Patrícia Poeta, and Gilberto Igrejas. 2022. "A One Health Approach Molecular Analysis of Staphylococcus aureus Reveals Distinct Lineages in Isolates from Miranda Donkeys (Equus asinus) and Their Handlers" Antibiotics 11, no. 3: 374. https://doi.org/10.3390/antibiotics11030374

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