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Article

Prevalence and Antifungal Susceptibility of Clinically Relevant Candida Species, Identification of Candida auris and Kodamaea ohmeri in Bangladesh

by
Fardousi Akter Sathi
1,
Shyamal Kumar Paul
2,
Salma Ahmed
3,
Mohammad Monirul Alam
4,
Syeda Anjuman Nasreen
1,
Nazia Haque
1,
Arup Islam
1,
Sultana Shabnam Nila
1,
Sultana Zahura Afrin
1,
Meiji Soe Aung
5 and
Nobumichi Kobayashi
5,*
1
Department of Microbiology, Mymensingh Medical College, Mymensingh 2200, Bangladesh
2
Netrokona Medical College, Netrokona 2400, Bangladesh
3
Department of Microbiology, Mugda Medical College, Dhaka 1214, Bangladesh
4
Department of ENT, Mymensingh Medical College Hospital, Mymensingh 2200, Bangladesh
5
Department of Hygiene, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan
*
Author to whom correspondence should be addressed.
Trop. Med. Infect. Dis. 2022, 7(9), 211; https://0-doi-org.brum.beds.ac.uk/10.3390/tropicalmed7090211
Submission received: 13 August 2022 / Revised: 22 August 2022 / Accepted: 22 August 2022 / Published: 26 August 2022
Browse Figure
Review Reports Versions Notes

Abstract

:
Candida species are major fungal pathogens in humans. The aim of this study was to determine the prevalence of individual Candida species and their susceptibility to antifungal drugs among clinical isolates in a tertiary care hospital in Bangladesh. During a 10-month period in 2021, high vaginal swabs (HVSs), blood, and aural swabs were collected from 360 patients. From these specimens, Candida spp. was isolated from cultures on Sabouraud dextrose agar media, and phenotypic and genetic analyses were performed. A total of 109 isolates were recovered, and C. albicans accounted for 37%, being derived mostly from HVSs. Among non-albicans Candida (NAC), C. parapsilosis was the most frequent, followed by C. ciferrii, C. tropicalis, and C. glabrata. Three isolates from blood and two isolates from aural discharge were genetically identified as C. auris and Kodamaea ohmeri, respectively. NAC isolates were more resistant to fluconazole (overall rate, 29%) than C. albicans (10%). Candida isolates from blood showed 95% susceptibility to voriconazole and less susceptibility to fluconazole (67%). Two or three amino acid substitutions were detected in the ERG11 of two fluconazole-resistant C. albicans isolates. The present study is the first to reveal the prevalence of Candida species and their antifungal susceptibility in Bangladesh.

Graphical Abstract

1. Introduction

Candida spp. is ubiquitous yeast and exists as normal flora within the mouth, throat, intestine, genital, and urinary tracts of humans. However, they can cause a broad spectrum of human infections, known as candidiasis, which include superficial (oral thrush, vulvovaginal candidiasis, otomycosis, paronychia, etc.) and deep-seated fungal infections (e.g., candidemia) [1]. Though the genus Candida includes more than 200 species, only 15 species have been isolated from infections in humans and animals [2]. Candida albicans has generally been the dominant species, accounting for about one half or more of the isolates from invasive infections, including candidemia, vulvovaginal candidiasis, denture stomatitis, and so forth [3,4,5]. Among non-albicans Candida (NAC) species, C. glabrata, C. parapsilosis, C. tropicalis, and C. krusei are the most frequently identified among clinical isolates, and their increasing trend has been noted [3,4,6,7,8].
During the past several decades, the incidence of candidiasis has substantially increased; this increase has been associated with the progress of medical care that includes aggressive antibiotic therapy practices and the use of immunosuppressive agents [9,10]. For example, treatment with interleukin 17 inhibitors for psoriatic patients increases the risk of developing fungal infections [11]. Candida spp. is the fourth most common cause of nosocomial bloodstream infection in the US [12], and candidemia causes a high mortality rate (28–38%) [13,14,15]. Recently, an increase in the isolation of NAC, associated with a relative decrease in C. albicans, has been observed [7,10,13,16]. Accordingly, the rising trend of resistance to antifungals is a concern for NAC, especially C. glabrata and C. parapsilosis [7,16,17]. Notably, C. auris has occurred and spread globally as an emerging pathogen that shows multidrug resistance and causes invasive infections in nosocomial settings [18].
Almost all Candida spp. are prevalent globally, with C. albicans being dominant and accounting for 30–70% of all Candida spp. from candidemia and invasive candidiasis. Nevertheless, particular geographical distributions and patient type-specificity have been observed for individual NAC species [19,20]. C. parapsilosis is primarily reported in Australia, Latin America, and Mediterranean countries, isolated from neonates and young adults, and often associated with the presence of a central venous catheter. C. glabrata is dominantly distributed in the US and north and central Europe, while C. tropicalis is dominantly found in Asia, the Middle East, and a part of Latin America. C. krusei is relatively more prevalent in Brazil, Canada, some European countries, and Australia. C. glabrata, C. tropicalis, and C. krusei are usually derived from older patients and are associated with solid tumors, organ transplants, and abdominal surgery.
For the treatment of Candida infections, several classes of antifungals, including azoles, polyenes, and echinocandins, are available. Among the antifungals, fluconazole, a member of the azole class compound, has most commonly been used. Azoles inhibit the fungal lanosterol 14 α-demethylase (ERG11), leading to a reduction in the production of ergosterol, an essential fungal membrane sterol. Candida species acquire resistance to azoles through the development of mutations in this enzyme, which reduces the binding affinity to azoles [21,22].
In Bangladesh, little is known about the actual situation of infections caused by Candida species, though the considerable burden of candidemia has been estimated [23]. The present study was conducted to clarify the prevalence of individual Candida species in different types of infections and their susceptibility to antifungal drugs among clinical isolates in a tertiary care hospital. Information regarding the prevalence of Candida species, based on accurate identification within this study, may provide advancement in the overview of candidiasis in Bangladesh for a better understanding of its etiology and antifungal treatment. Particularly, the novel findings, including the identification of emerging Candida species and ERG11 mutations, may inform clinicians of public health issues related to Candida in the country.

2. Materials and Methods

2.1. Study Design and Setting, Collection of Specimens

This research was conducted as a cross-sectional, observational study in a single center within Mymensingh Medical College hospital. Three types of clinical specimens (i.e., high vaginal swabs (HVSs), blood, and aural swabs (discharge)) were collected from patients with suspected vulvovaginal candidiasis (inpatients and outpatients; department of gynecology and obstetrics), candidemia (inpatient; department of pediatrics, Intensive Care Unit (ICU) and Neonatal Intensive Care Unit (NICU), hematology, oncology, medicine, and surgery), and otomycosis (outpatients; ear, nose, and throat (ENT) department), respectively, from March to December 2021. The inclusion criteria of patients with each infection type were as follows: patients clinically suspected of candidemia, showing symptoms of sepsis not responding to antibiotic treatment for 7 days, and possessed previously described risk factors for candidemia [24,25]; women within the age group of 18–56 years, with clinically suspected vulvovaginal candidiasis, and possessing risk factors (diabetes mellitus, pregnancy, use of oral contraceptive, or antibiotics); both male and female patients of all age groups with clinically suspected Candida-associated otomycosis.

2.2. Culture and Identification of Candida spp.

Blood cultures were taken for all patients with suspected candidemia (i.e., patients with clinical signs or symptoms of sepsis with specific risk factors for candidemia, as mentioned above). Blood samples were inoculated aseptically into BACT/ALERT®FA/PF PLUS blood culture bottles (bioMérieux, Durham, NC, USA) and incubated in a BACT/ALERT machine at 37 °C until a positive indication of growth was provided by the machine or for a maximum of 5 days [26]. Subsequently, liquid media containing blood from the BACT/ALERT®FA/PF PLUS bottles were cultured on Sabouraud dextrose agar (SDA) media with chloramphenicol (Sabouraud chloramphenicol agar, HiMedia, Mumbai, India); blood agar media and MacConkey agar media were housed at 37 °C for 24 h and up to 48 h for SDA media. Chloramphenicol was supplemented with SDA media to inhibit bacterial growth. HVSs and aural discharges were cultured on SDA media with chloramphenicol at 35–37 °C for 24–48 h, aerobically.
All the Candida isolates were identified based on characteristics of a colony (creamy white, smooth, pasty consistency) on SDA media with a distinct smell. All suspected colonies were examined using standard microbiological methods, including microscopic examination, Gram staining, germ tube tests, subcultures on chromogenic agar media (HiCrome™Candida Differential Agar M1297A, HiMedia, Mumbai, India), citrate utilization tests, and urea hydrolysis tests. For all of the isolates, species were identified genetically through PCR detection of the ITS1-5.8S-ITS2 ribosomal region with ITS1 and ITS4 primers, and its RFLP profile after digestion with MspI, as described previously [27]. For isolates left unidentified after using the PCR-RFLP method, the nucleotide sequence of the PCR product was determined using the Sanger sequencing method, and the identical or most similar sequence was searched for using the BLAST web tool (https://blast.ncbi.nlm.nih.gov/Blast.cgi, accessed on 20 February 2022). The assigned species was confirmed phylogenetically, with sequences of other strains retrieved from the GenBank database through the use of MEGA.11 software.

2.3. Antifungal Susceptibility Testing

Susceptibility to antifungal agents was determined using the broth microdilution method and the disk diffusion method. The minimum inhibitory concentration (MIC) to fluconazole was determined for all isolates, while MIC to amphotericin B was only measured for blood isolates. Based on the disk diffusion method using commercial disks (HiMedia, Mumbai, India), susceptibility to fluconazole (25 μg), voriconazole (1 μg), itraconazole (10 μg), and amphotericin B (10 μg) was tested for among blood isolates. In contrast, susceptibilities to fluconazole (25 μg), itraconazole (10 μg), clotrimazole (10 μg), and nystatin (100 U) were examined for among isolates from HVSs and aural swabs. Susceptibilities to fluconazole and voriconazole were interpreted using the CLSI standard M60-Ed2 [28], and those of other antifungals were judged according to the published criteria [29,30]. For NAC species for which the standards of fluconazole susceptibility are not defined by the CLSI, the criterion of C. albicans was applied as described previously [31].

2.4. Sequence Analysis of the ERG11 Gene

As an additional analysis, a nucleotide sequence of the ERG11 gene was determined for C. albicans isolates showing fluconazole resistance using the PCR and Sanger sequencing methods. For PCR, previously reported primers were used [32,33]. Sequence data were compared with those of fluconazole-susceptible strains through alignment using the Clustal Omega program (https://www.ebi.ac.uk/Tools/msa/clustalo/, accessed on 10 April 2022).

2.5. Statistical Analysis

Patients’ information was collected through clinical records and structured questionnaires. The risk factors of each infection type and the data obtained in the present study were statistically analyzed using IBM SPSS Statistics for Windows Version 26 (IBM Corp. Armonk, NY, USA).

2.6. GenBank Accession Numbers

The ERG11 gene sequences of C. albicans determined in this study were deposited to GenBank under accession numbers ON161125 and ON161126.

3. Results

During the 10-month study period, 360 samples of suspected patients with candidiasis (HVSs = 175; blood = 125; aural swabs = 60) were examined, and a total of 109 isolates of Candida were recovered from HVSs (n = 52), blood (n = 39), and aural swabs (n = 18). Vulvovaginal candidiasis was diagnosed mainly within the reproductive age group (18–45 years) and candidemia patients were mostly neonates, while otomycosis was found within a wide age range (Figure S1). For 104 isolates, 11 species of Candida were identified phenotypically as well as through PCR and RFLP methods (Table S1). The remaining five isolates were identified through a sequence analysis of the ITS1-5.8S-ITS2 region. After all, 12 Candida species and Kodamaea ohmerii were identified (Table 1).
C. albicans (n = 40) accounted for 37% of all isolates and was mostly derived from HVSs (34/40, 85%) as well as major species from HVSs (34/52, 65.4%) (Table 1). Among NAC (n = 69), C. parapsilosis was the most frequent (n = 25, 36%), followed by C. ciferii, C. tropicalis, and C. glabrata. The dominant species in blood isolates was C. parapsilosis (n = 16, 41%), with C. ciferrii (n = 9, 23%) being the second most common. Half of the isolates from the aural swabs were C. parapsilosis or C. tropicalis. Three isolates from blood and two isolates from aural swabs were identified as C. auris and K. ohmeri, respectively. The ITS1-5.8S-ITS2 region of these isolates clustered with those of individual species in phylogenetic analysis, showing >99% identity (Figure S2). K. ohmeri was derived from otomycosis in female patients of 40 and 42 years of age. All the C. auris were isolated from neonates, including two fatal cases. The first fatal case with a C. auris infection was a 15-day-old male neonate with signs of sepsis not responding to antibiotics (meropenem and gentamicin for 10 days; later on, colistin); the neonate died 2 days after the diagnosis of multiorgan failure due to sepsis, though voriconazole was used in treatment. The isolated C. auris was resistant to fluconazole, itraconazole, voriconazole, clotrimazole, nystatin, and amphotericin B. The second fatal case was a 2-day-old male neonate with signs of early-onset neonatal sepsis—who was treated with ceftazidime, amikacin, and, later, voriconazole—but died from cardio-respiratory failure due to septicemia. A survival case was a 12-day-old male neonate, who showed symptoms of sepsis for 10 days without responding to ceftazidime and amikacin; he was later treated with colistin with no response. He recovered 7 days after treatment with voriconazole.
Table 2 shows susceptibility to fluconazole among all of the Candida isolates, based on MIC (the distribution of the MIC values is shown in Table S2). Although most C. albicans isolates were susceptible or susceptible dose dependent (SDD), NAC exhibited significantly higher resistance rates (overall, 29%) than C. albicans (10%). Among NAC, fluconazole resistance was detected in eight species, among which C. ciferrii, C. auris, and K. ohmeri showed higher resistance rates (>67%) than other species, except for the intrinsically resistant C. krusei.
Antifungal susceptibility in each specimen (infection) type is shown in Table 3. The blood isolates exhibited 95% susceptibility to voriconazole, while showing lower susceptibility to fluconazole and itraconazole (67–69%). In contrast, isolates from HVSs and aural swabs were more susceptible to fluconazole as well as nystatin (78–94%), with lower susceptibility to clotrimazole. The distribution of the MICs of amphotericin B (blood isolates) is indicated in Table S3.
The ERG11 gene was analyzed for two C. albicans isolates (A173-22 from recurrent vulvovaginitis in a 27-year-old female patient; A1201-57 from candidemia in a male, premature, low-birth-weight neonate). These isolates were resistant to fluconazole, with a MIC of >64 μg/mL. Nearly a full-length sequence of the ERG11 gene was determined for the C. albicans isolates and was compared with that of a wild type of the ERG11 in the SC5314 strain, which is susceptible to fluconazole [34]. It was revealed that C. albicans isolates A173-22 and A1201-57 had three and two missense mutations, respectively, causing amino acid substitutions (A114V, F145L, and L276V in A173-22; A114V and F145L in A1201-57) (Figure S3).
Identified risk factors in patients with individual candidal infections are summarized in Table 4. In candidemia, the prolonged use of broad-spectrum antibiotics was found in all patients; subsequently, total parenteral nutrition and lower uterine cesarean section were also common among neonate cases. The oral contraceptive pill was most strongly associated with vulvovaginal candidiasis, while habitual cleaning and the use of antibiotic/steroid drops were frequently observed in otomycosis.

4. Discussion

In the present study, Candida species were identified among isolates from three infection types in a tertiary care hospital in Bangladesh, and their antifungal susceptibility was determined. Among isolates from HVSs, the predominant species was C. albicans, which has previously been reported as a cause of vulvovaginal candidiasis [35,36]. In contrast, from the aural swabs, C. parapsilosis was determined to be the most common, followed by C. tropicalis. Otomycosis is known to be caused by various fungal pathogens, with Aspergillus species being more common than Candida spp. [37]; thus, the prevalence of Candida species in otomycosis is not yet well understood. As for Candida spp. from otomycosis, a high prevalence of C. parapsilosis [37,38] as well as C. albicans [39] was described. The present study may support a major role of C. parapsilosis in otomycosis.
It was notable in the present study that C. parapsilosis and C. ciferrii were the species most frequently isolated from blood, accounting for >60% isolates of these species. Among Candida species, C. albicans is the main pathogen of bloodstream infections, as described in many studies [3,4,14]. However, an increase in NAC species has been observed recently [8], and C. parapsilosis was detected as the second most common species, showing a comparable proportion to C. albicans in some studies [40,41]. Furthermore, the highest detection rate was described for C. parapsilosis as a cause of candidemia [8,42]. In a study of candidemia in neonatal ICU patients in Spain, an increasing trend of C. parapsilosis was indicated over twenty years [42]. Because our study was conducted in a single hospital and most blood isolates were obtained from neonates, C. parapsilosis is suggested to have been persisting as a nosocomial pathogen, though the geographical differences in the prevalence of the Candida species may be related to its dominance.
C. ciferrii is a rare species of the human pathogen and causes various diseases, including systemic mycosis in immunocompromized hosts [43], pneumonia [44], endophthalmitis [45], and onychomycosis [46]. Although this species is not listed as a common cause of candidemia [3], there are a few case reports of fungemia due to C. ciferrii in children and adults [47,48]. In addition, C. ciferrii resulting from human infections has often shown fluconazole resistance [43,47]. Likewise, C. ciferrii isolates in the present study exhibited high resistance rates to fluconazole and itraconazole. The isolation of this species within three types of specimens in the present study may suggest the prevalence of this organism nosocomially or endemically in the study site, indicating the need for further surveillance.
C. auris and K. ohmeri are emerging fungal pathogens that cause nosocomial infections, lead to high mortality, and have been detected worldwide [18,49]. In Bangladesh, these species were rarely detected, with only C. auris being reported in a single study in Dhaka [50]. In the present study, C. auris and K. ohmeri were identified in candidemia in children and aural infections in adults, respectively. It has been revealed that C. auris is prone to causing invasive infections associated with resistance to multiple antifungal drugs, which is implicated in the difficulty of the treatment of its infection [18]. In accordance with these observations, all of the C. auris isolates in the present study were derived from bloodstream infections in neonates, including some fatal cases, and showed resistance to fluconazole, itraconazole, and amphotericin B; resistance to voriconazole was even shown in one isolate. Among the fatal cases, the recognition of non-response to the initial treatment with antibacterial drugs and the subsequent change to antifungals appeared to occur too late. Accordingly, early diagnosis and initiation of antifungal treatment may be essential for C. auris infections. C. auris is able to persist and survive on biotic and abiotic surfaces for long periods due to its unique traits, thermotolerance, and osmotolerance [18]. Accordingly, this Candida species is suggested to potentially remain viable within hospital environments and medical devices. To prevent the spread of C. auris in hospitals, early identification of this Candida species, enhanced personal protection practices, environmental cleaning, and the decolonization of patients may be required. Confirmation of C. auris in this study may be indicative of the necessity for preparation to control its infections within Bangladesh. K. ohmeri has been increasingly reported as a cause of invasive infections worldwide and is more frequently reported in Asia [49]. The identification of K. ohmeri in the present study within non-invasive infections may pose potential concerns for its distribution into the environment and the occurrence of invasive disease. Thus, the same control measures used for C. auris may be also necessary for K. ohmeri.
Although C. albicans from candidemia has been shown to be highly susceptible to fluconazole in worldwide scale surveillance (>99% susceptibility) [4,7,51], some regional studies (China and Turkey) have reported a 5–20% resistance rate to fluconazole [17,41,52]. In contrast, higher resistance rates to fluconazole (34–50%) were described among isolates from vulvovaginal candidiasis or various candidiasis (mostly non-candidemia) [6,53]. In the present study, fluconazole resistance was detected in 6% (2/34) of C. albicans isolates from HVSs, which may represent a relatively lower rate. Nevertheless, fluconazole resistance rates among blood isolates were relatively high in C. albicans (25%, 1/4) and NAC (34%, 12/35). Because of the low number of C. albicans blood isolates in this study, the prevalence of fluconazole resistance in candidemia remains to be determined.
Sequence analyses of the ERG11 genes of azole-resistant C. albicans isolates from blood and HVSs revealed the presence of three amino acid substitutions, among which A114V and F145L in both isolates were located in hotspot I [54] and were associated with increased MIC to fluconazole [32,55]. Although the L276V in hotspot II that was detected within an HVS isolate was a novel mutation, the reported mutations in this region were less frequent, and their contribution to fluconazole resistance was not evident [55,56,57]. Nevertheless, the present analysis of ERG11 is still preliminary; thus, further, more robust study is necessary to determine the development of ERG11 mutations in fluconazole-resistant Candida in Bangladesh.
The present study is the first characterization of Candida spp., along with clinical characteristics/risk factors of candidiasis, in Bangladesh. In this study, sepsis, chemotherapy, and total parenteral nutrition were found to be risk factors, as has been previously described for invasive candidiasis [17,52]. The prolonged use of broad-spectrum antibiotics was found in all of the candidemia cases, along with high frequencies of obstetric or neonatal complications with candidemia, which are considered to be more related to medical status in developing countries. As indicated previously [58], the use of the oral contraceptive pill was the most common risk factor for vulvovaginal candidiasis. These findings, as well as the antifungal susceptibility information within the present study, may contribute to treating and preventing candidiasis in Bangladesh. Further epidemiological study may be necessary to determine the prevalence and trends of Candida species and monitor their antifungal resistance, especially for C. auris, K. ohmeri, and some NAC species.

Supplementary Materials

The following supporting information can be downloaded at: https://0-www-mdpi-com.brum.beds.ac.uk/article/10.3390/tropicalmed7090211/s1, Figure S1: Frequency of candidiasis patients (specimen types) in each age group; Figure S2: Phylogenetic dendrogram of the ITS1-5.8S-ITS2 ribosomal region of the C. auris and K. ohmeri; Figure S3: Alignment of nucleotide and amino acid sequences of the ERG11 gene/protein product of C. albicans isolates A173-22, A1201-57 and reference strain SC5314; Table S1: Isolate numbers of each Candida species identified by different methods; Table S2: MIC of Fluconazole against isolated Candida species by broth microdilution method (n = 109); Table S3: MIC of Amphotericin B against of Candida species isolated from blood using the broth microdilution method (n = 39).

Author Contributions

Conceptualization, F.A.S., S.K.P. and S.A.N.; methodology, F.A.S., S.K.P. and S.A.; investigation, F.A.S., A.I., S.S.N. and S.Z.A.; resources, F.A.S., M.M.A. and N.H.; writing—original draft preparation, F.A.S.; writing—review and editing, M.S.A. and N.K.; supervision, S.K.P. and N.K. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

This study was conducted in accordance with the Declaration of Helsinki, and approved by the Institutional Review Board of Mymensingh Medical College (MMC/IRB/2021/390).

Informed Consent Statement

Informed consent was obtained from all subjects or guardians involved in the study.

Conflicts of Interest

The authors declare no conflict of interest.

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Table
Table 1. Incidence of Candida species from three clinical specimens (n = 109).
Table 1. Incidence of Candida species from three clinical specimens (n = 109).
Candida
Species		Number of Isolates
(% in All the Isolates)		Number of Isolates (% in Specimens)
HVSBloodAural Swab
C. albicans40 (36.7)34 (65.4)4 (10.3)2 (11.1)
C. parapsilosis25 (22.9)4 (7.7)16 (41)5 (27.8)
C. ciferrii12 (11)1 (1.9)9 (23)2 (11.1)
C. tropicalis10 (9.2)5 (9.6)1 (2.6)4 (22.2)
C. glabrata6 (5.5)5 (9.6)1 (2.6)0
C. rugosa4 (3.7)04 (10.3)0
C. famata3 (2.8)003 (16.7)
C. auris3 (2.8)03 (7.7)0
K. ohmeri2 (1.8)002 (11.1)
C. dubliniensis1 (0.9)1 (1.9)00
C. krusei1 (0.9)1 (1.9)00
C. kefyr1 (0.9)1 (1.9)00
C. lusitaniae1 (0.9)01 (2.6)0
Total109 (100)52 (100)39 (100)18 (100)
Table
Table 2. Susceptibility to fluconazole among C. albicans and NAC.
Table 2. Susceptibility to fluconazole among C. albicans and NAC.
Candida SpeciesNumber of
Isolates		Numbr of Isolates Showing Susceptibility *
(% in C. albicans/NAC)
SSDDR
C. albicans4026 (65)10 (25)4 (10)
C. parapsilosis251753
C. tropicalis10541
C. glabrata6042
C. ciferrii12228
C. rugosa4040
C. auris3003
C. famata3300
C. dubliniensis1100
C. krusei1001
C. kefyr1001
C. lusitaniae1100
K. ohmeri2002
NAC total6930 (43)19 (28)20 (29) **
* S, susceptible; SDD, susceptible dose dependent; R, resistant. ** Significantly higher rate (p < 0.05) than C. albicans.
Table
Table 3. Susceptibility to antifungals among Candida isolates from different specimens.
Table 3. Susceptibility to antifungals among Candida isolates from different specimens.
SpecimenCandida speciesNumber of
Isolates		Number of Isolates (%) Showing Susceptibility to Antifungals
FluconazoleItraconazoleVoriconazoleAmphotericin B
SSDDRSSDDRSRSR
BloodC. albicans43014004040
C. parapsilosis161303943160160
C. ciferrii93063068145
C. rugosa44004004040
C. auris30030032103
C. glabrata11001001010
C. lusitaniae11001001001
C. tropicalis11001001010
Total3926
(67%)		013
(33%)		23
(59%)		4
(10%)		12
(31%)		37
(95%)		2
(5%)		30
(77%)		9
(23%)
HVSC. albicans3431032392295259
C. glabrata52122125032
C. tropicalis54104104141
C. parapsilosis44004004031
C. ciferrii10010010101
C. dubliniensis11001001010
C. krusei10100101001
C. kefyr11000101001
Total5243
(82%)		4
(8%)		5
(10%)		34
(65%)		13
(25%)		5
(10%)		45
(87%)		7
(13%)		36
(69%)		16
(31%)
FluconazoleItraconazoleNystatinClotrimazole
SSDDRSSDDRSRSR
Aural SwabC. albicans22001102020
C. parapsilosis55005003232
C. tropicalis44002113122
C. famata33003002121
C. ciferrii21011012011
K. ohmeri20200202002
Total1815
(83%)		2
(11%)		1
(6%)		12
(67%)		4
(22%)		2
(11%)		14
(78%)		4
(22%)		10
(56%)		8
(44%)
Table
Table 4. Risk factors found among patients with individual candidal infections.
Table 4. Risk factors found among patients with individual candidal infections.
Infection Type/Patient GroupRisk FactorsN (%)
Candidemia, neonates (n = 33)Prolonged broad spectrum antibiotic33 (100) *
Total parenteral nutrition 22 (67) *
Lower uterine cesarean section20 (61) *
Low birth weight17 (52) *
Nasogastric feeding17 (52) *
O2 therapy17 (52) *
Preterm birth17 (52) *
Neonatal Jaundice14 (42) *
History of septicemia12 (36) *
Prolonged rupture of membrane6 (18) *
Gestational diabetes mellitus 2 (6)
Meconium stained liquor2 (6)
Candidemia, pediatric and elderly (n = 6)Prolonged broad spectrum antibiotic6 (100) *
Sepsis4 (67) *
History of taking chemotherapy3 (50) *
Malignancy 3 (50) *
ICU stay (>14 days)2 (33) *
Vulvovaginal candidiasis (n = 52)Oral contraceptive pill28 (54) *
Recent broad spectrum antibiotic20 (39) *
Diabetes mellitus16 (31) *
Pregnancy10 (19) *
Otomycosis (n = 18)Habitual cleaning12 (67) *
Antibiotic or steroid drop use10 (56) *
Oil instillation in ear8 (44) *
Diabetes mellitus6 (33) *
Trauma2 (11)
* Significantly higher rate (p < 0.01) than other infection type/patient groups
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Sathi, F.A.; Paul, S.K.; Ahmed, S.; Alam, M.M.; Nasreen, S.A.; Haque, N.; Islam, A.; Nila, S.S.; Afrin, S.Z.; Aung, M.S.; et al. Prevalence and Antifungal Susceptibility of Clinically Relevant Candida Species, Identification of Candida auris and Kodamaea ohmeri in Bangladesh. Trop. Med. Infect. Dis. 2022, 7, 211. https://0-doi-org.brum.beds.ac.uk/10.3390/tropicalmed7090211

AMA Style

Sathi FA, Paul SK, Ahmed S, Alam MM, Nasreen SA, Haque N, Islam A, Nila SS, Afrin SZ, Aung MS, et al. Prevalence and Antifungal Susceptibility of Clinically Relevant Candida Species, Identification of Candida auris and Kodamaea ohmeri in Bangladesh. Tropical Medicine and Infectious Disease. 2022; 7(9):211. https://0-doi-org.brum.beds.ac.uk/10.3390/tropicalmed7090211

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Sathi, Fardousi Akter, Shyamal Kumar Paul, Salma Ahmed, Mohammad Monirul Alam, Syeda Anjuman Nasreen, Nazia Haque, Arup Islam, Sultana Shabnam Nila, Sultana Zahura Afrin, Meiji Soe Aung, and et al. 2022. "Prevalence and Antifungal Susceptibility of Clinically Relevant Candida Species, Identification of Candida auris and Kodamaea ohmeri in Bangladesh" Tropical Medicine and Infectious Disease 7, no. 9: 211. https://0-doi-org.brum.beds.ac.uk/10.3390/tropicalmed7090211

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