negative culture
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2022 ◽  
Vol 11 (1) ◽  
pp. 260
Author(s):  
Kyung-Hee Park ◽  
Su-Jung Park ◽  
Mi-Hye Bae ◽  
Seong-Hee Jeong ◽  
Mun-Hui Jeong ◽  
...  

Background: nosocomial sepsis remains a significant source of morbidity and mortality in extremely low birth weight (ELBW) infants. Early and accurate diagnosis is very important, but it is difficult due to the similarities in clinical manifestation between the causative microorganisms. We tried to identify the differences between causative microorganisms in clinical and laboratory findings and to help choose antibiotics, when sepsis was suspected in ELBW infants. Methods: a retrospective study was conducted on preterm infants, born at less than 28 weeks of gestation, with a birth weight of less than 1000 g between January 2009 and December 2019. Clinical and laboratory findings of suspected sepsis, after the first 72 h of life, were assessed. We classified them into four groups according to blood culture results (gram positive, gram negative, fungal, and negative culture groups) and compared them. Results: a total of 158 patients were included after using the exclusion criteria, with 45 (29%) in the gram positive group, 35 (22%) in the gram negative group, 27 (17%) in the fungal group, and 51 (32%) in the negative culture group. There were no significant differences in mean gestational age, birth weight, and neonatal morbidities, except for the age of onset, which was earlier in the fungal group than other groups. White blood cell (WBC) counts were the highest in the gram negative group and the lowest in the fungal group. The mean platelet counts were the lowest in the fungal group. C-reactive protein (CRP) levels were the highest in the gram negative group, while glucose was the highest in the fungal group. Conclusions: in conclusion, we showed that there are some differences in laboratory findings, according to causative microorganisms in the nosocomial sepsis of ELBW infants. Increased WBC and CRP were associated with gram negative infection, while decreased platelet and glucose level were associated with fungal infection. These data may be helpful for choosing empirical antibiotics when sepsis is suspected.


Author(s):  
Megan M. Petteys ◽  
Leigh Ann Medaris ◽  
Julie E. Williamson ◽  
Rohit S. Soman ◽  
Travis A. Denmeade ◽  
...  

Abstract Antibiotic overuse is high in patients hospitalized with coronavirus disease 2019 (COVID-19) despite a low documented prevalence of bacterial infections in many studies. In this study evaluating 65 COVID-19 patients in the intensive care unit, empiric broad-spectrum antibiotics were often overutilized with an inertia to de-escalate despite negative culture results.


Author(s):  
Ashish Lanjekar ◽  
Pranada Deshmukh ◽  
Devendra Palve ◽  
Monal Kukde ◽  
Isha Madne ◽  
...  

Aims: To evaluate the effect of topical antifungal Clotrimazole on candida colonies and its correlation with clinical candidiasis in patients undergoing radiotherapy. Study Design: Randomised Clinical Trial Place and Duration of Study: Rashtrasant Tukdoji Maharaj Cancer Institute, Nagpur between June 2020 and July 2021. Methodology: 64 patients (52 males and 12 females) undergoing Co60 teletherapy for cervicofacial malignancies were randomly divided in two groups. 32 patients referred to as study group were put on antifungal treatment (1% Clotrimazole) for topical application and other group was the control group and was not given antifungal medication. During the radiotherapy and 6 weeks after the completion of radiotherapy, patients were examined every week for possible oral changes for clinical candidiasis, and swabs were taken at every end of the week for determining candidal colonies. Results: The overall incidence of clinical oral candidiasis was 46.9% throughout RT in the control group and there was no incidence of clinical candidiasis in the study group. Patients with clinical candidiasis 6-week post-radiation therapy showed continuous symptoms of clinical candidiasis but with the reduction in candidal colonies.22% of patients were oral carriers for candidal colonies. Also, the study group showed not a single patient with clinical candidiasis. Conclusion: During radiotherapy, although with the use of clotrimazole some patients with negative culture may also become positive for Candida albicans and there may be some increase in the several colonies of Candida albicans (very less in number as compared to the control group), but its use prevents the development of clinical candidiasis. Antifungal prophylaxis is useful in combating clinical candidiasis.


Author(s):  
Rebecca A. Stokes ◽  
Michelle C. Coleman ◽  
Artem S. Rogovskyy ◽  
Vanna M. Dickerson ◽  
Kelley M. Thieman Mankin

Abstract OBJECTIVE To compare bacteriologic culture results for superficial swab and tissue biopsy specimens obtained from dogs with open skin wounds. ANIMALS 52 client-owned dogs. PROCEDURES For each dog, 1 wound underwent routine preparation prior to collection of 2 specimens, 1 by superficial swab (Levine) technique and 1 by tissue biopsy. Specimens were processed for bacteriologic culture. Two observers determined whether any detected difference in culture results for the 2 types of specimen would have resulted in differing treatment plans. RESULTS Culture results of swab and tissue biopsy specimens were identical in 11/52 (21.2%) cases. Tissue biopsy specimen and swab cultures yielded positive results for 44 (84.6%) and 40 (76.9%) wounds, respectively. With regard to mean recovery rates of bacteria from wounds with positive culture results, both the biopsy specimens and swabs yielded 3.4 bacterial species/wound. All wounds for which swab cultures yielded no growth also had negative culture results for biopsy specimens. Biopsy specimen and swab culture results were in agreement with regard to the most common bacteria cultured. In 7/52 (13%) wounds, the observers would have treated the patient differently on the basis of the results of the 2 cultures. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that culture of a swab collected by the Levine technique is an appropriate noninvasive alternative to culture of a tissue biopsy specimen. A negative result obtained from culture of a swab is likely to be reliable. Disagreement between the results of swab and tissue biopsy specimen cultures is likely of low clinical importance.


2021 ◽  
Author(s):  
Natalia Sroka-Ostrow ◽  
Radosław Pietrzak ◽  
Dominika Pykało-Gawińska ◽  
Julia Zaręba-Szczudlik ◽  
Krzysztof Czajkowski ◽  
...  

Abstract BACKGROUND: The perioperative management of the cervical cerclage procedure is not unified. Controlling microbiome cervical status does not affect obstetric outcomes in general population, but it can be beneficial in cervical insufficiency. Eliminating cervical pathogens in those patients may increase the effectiveness, resulting in prevention of miscarriage or preterm labor and delivery of a baby capable of normal development.METHODS: Thirty five patients undergoing cervical cerclage at the 2nd Department of Obstetrics and Gynecology, Medical University of Warsaw, were included in the study. The procedure was performed only after receiving a negative culture from the cervical canal.RESULTS: Thirty one (88.5%) patients delivered after the 34th and 28 (80%) after the 37th week of gestation. The colonization of genital tract was found in 31% of patients prior to the procedure, 42% in the subsequent course of pregnancy and 48% before delivery. Eighty five percent of patients who had miscarriage or delivered prematurely had abnormal cervical cultures. In patients with normal cervical cultures 91.67% women delivered at term. There were no abnormalities in children’s development.CONCLUSIONS: Controlling microbiological status of the cervical canal results in better or similar outcomes to those reported by other authors in terms of obstetric and neonatal outcomes. Active eradication of the reproductive tract colonization potentially increases the effectiveness of the cervical cerclage placement.


2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Chang-Wan Kim ◽  
Chang-Rack Lee ◽  
Dae-Hyun Park ◽  
Doo-Yeol Kim ◽  
Jeong-Woo Kim

Abstract Background The effect of negative culture on the treatment outcomes of chronic periprosthetic joint infection (PJI) is still controversial. The purpose of this study is to evaluate whether the outcomes of two-stage revision in culture-negative chronic PJI differ from those in culture-positive PJI. Methods The patients who received two-stage revisions due to chronic PJI during the period between 2007 and 2017 were retrospectively reviewed. The culture-negative and culture-positive PJI group included 57 cases and 79 cases, respectively. The demographic data, as well as reoperation, mortality, reinfection, and failure rates of each group were evaluated. Results There was a significant difference in reoperation rate between the two groups for the period from the first-stage surgery to the second-stage revision arthroplasty (p = 0.045). The reoperation rate of the culture-positive group was 25.3% (20/79) whereas that of the culture-negative group was 10.5% (6/57). Among the 136 PJI cases, 97 cases (71.3%) received reimplantation surgery (culture-negative group, 43 cases; culture-positive group, 54 cases). No significant difference was noted between the culture-negative and culture-positive groups with respect to the number of cases that did not undergo reimplantation surgery and the reoperation, reinfection, mortality, and failure rates after two-stage surgery (p > 0.05, all parameters). Conclusions The culture outcome had no significant effect on the outcome of the two-stage revision in patients with chronic PJI. The reoperation rate after first-stage surgery was significantly higher in the culture-positive group, but the overall failure rate did not significantly differ in both the groups. The presence of a negative culture might be a good prognostic factor for chronic PJI.


2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Sara Niae ◽  
Chompoonek Yurayart ◽  
Naris Thengchaisri ◽  
Panpicha Sattasathuchana

Abstract Background Lifestyle factors such as hair length, the frequency of ear cleaning and bathing, age, cat rearing, and sex may contribute to opportunistic yeast infections in the external ear canal of cats. This study aimed to determine the prevalence of commensal yeast organisms in cats’ external ear canals, evaluate their predisposing lifestyle factors, and test the susceptibility of Malassezia pachydermatis to antifungal agents. Results A total of 53 cats (33 male and 20 female) seronegative for feline leukemia virus and feline immunodeficiency virus were enrolled in this study. Their mean age (± standard deviation) was 6.04 (± 3.49) years. Fungal cultures and polymerase chain reaction tests were performed to identify the yeast species derived from the external ear canal. The association between lifestyle factors and the presence of M. pachydermatis was evaluated using Fisher’s exact test. The susceptibility of M. pachydermatis to antifungal agents was also analyzed. M. pachydermatis was the most frequently recovered yeast species, with a prevalence of 50.94 % (95 % confidence interval [CI]: 36.84–64.94 %). There was an association between hair length and a positive culture for M. pachydermatis (p = 0.0001). The odds of a negative culture for M. pachydermatis among short-haired cats was 11.67 (95 % CI, 3.22–42.24) times higher than that among long-haired cats (p = 0.0002). There was also an association between the frequency of ear cleaning and the presence of M. pachydermatis (p = 0.007). The odds of a negative culture for M. pachydermatis in cats that were receiving ear cleaning at intervals of ≤ 2 weeks was 5.78 (95 % CI, 1.67–19.94) times greater than that of cats receiving ear cleaning at intervals greater than 2 weeks or never (p = 0.0055). Ranges of minimum inhibitory concentrations (MICs) and minimum fungicidal concentrations for itraconazole, ketoconazole, miconazole, and terbinafine against M. pachydermatis were ≤ 0.063–4 and ≤ 0.063–≥32, ≤ 0.063–8 and 0.125–≥32, ≤ 0.063–≥32 and 0.5–≥32, and ≤ 0.016–1 and 0.125–8 µg/ml, respectively. Conclusions M. pachydermatis was the most commonly identified yeast organism in the external ear canal of healthy cats. Hair length and the frequency of ear cleaning played a role in the colonization of M. pachydermatis. The M. pachydermatis isolates had various MIC levels for common fungicides.


2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Cheng-he Qin ◽  
Rui Tao ◽  
Ji-wei Luo ◽  
Liang Hong ◽  
Lei Xu ◽  
...  

Abstract Background Previous articles have focused on the diagnosis and treatment of acute hematogenous osteomyelitis. Here, we present a case of chronic hematogenous osteomyelitis in a 2-month-old girl. The diagnostic procedure was unusual and difficult due to negative culture results. Case presentation A girl aged 2 months and 23 days had fever and swelling in her right lower leg for 7 days. On the basis of her medical history, physical, and histological examination results; and radiologic and magnetic resonance imaging findings, a diagnosis of chronic osteomyelitis was made. The patient underwent surgical treatment and was discharged successfully. The patient showed good recovery and no sequelae at the 12-month follow-up. Conclusion Hematogenous osteomyelitis in babyhood is different from that at any other age. Hematogenous osteomyelitis-related bone destruction in babyhood is more serious and occurs faster. The transition from acute hematogenous osteomyelitis to chronic hematogenous osteomyelitis takes only 7 days. To the best of our knowledge, this chronic hematogenous osteomyelitis patient is the youngest ever reported.


2021 ◽  
Vol 10 (11) ◽  
pp. 2514
Author(s):  
Patricia Comella-del-Barrio ◽  
John S. Bimba ◽  
Ramota Adelakun ◽  
Konstantina Kontogianni ◽  
Bárbara Molina-Moya ◽  
...  

There is a need for diagnostics for tuberculosis (TB) that are easy to use, able to screen non-sputum samples, and able to provide rapid results for the management of both immunocompromised and immunocompetent individuals. The Fujifilm SILVAMP TB LAM (FujiLAM) assay, a new non-sputum based point of need test for the diagnosis of TB, could potentially address most of these needs. We evaluated the performance of FujiLAM in HIV positive and HIV negative patients with presumptive TB attending three district hospitals in Nigeria. Consecutive patients were asked to provide urine samples on the spot, which were tested with FujiLAM. The results were compared against a positive culture and/or Xpert MTB/RIF as the reference standard. Forty-five patients had bacteriologically confirmed TB, and 159 had negative culture and Xpert MTB/RIF (no TB). The FujiLAM test was positive in 23 (sensitivity 65.7%, 95% CI = 48–80) HIV negative and seven (70%, 95% CI = 35–92) HIV positive patients with bacteriological confirmation of TB. FujiLAM was negative in 97 (specificity 99.0%, 95% CI = 94–100) HIV negative and 56 (93.3%, 95% CI = 83–98) HIV positive patients without TB. The FujiLAM test has good diagnostic accuracy for considering its application in both HIV positive and HIV negative patients with TB.


2021 ◽  
Author(s):  
Mohammadshah Isam Gul ◽  
Ammara Bint I Bilal ◽  
Fateen Ata ◽  
Renan E Ibrahem ◽  
Muhammad I Danjuma

Abstract BackgroundCervical ribs are a rare and usually asymptomatic occurrence. Most are identified incidentally by Roentgenogram (X-rays). However, occasionally they can cause nerve impingements and compressive symptoms. In cervical ribs, osteomyelitis secondary to trauma is unheard of. We report such a case made more interesting by the familial presence of bilateral cervical ribs in 2 generations. This indicates a possible familial origin. Case presentationA 26-year-old woman known to have fibromyalgia presented with left shoulder pain and fever episodes. She was recently discharged from intensive physiotherapy for fibromyalgia management, but the pain aggravated instead of getting better unilaterally in the left arm after discharge. Electric shock-like sensations and reduced strength accompanied this. An evaluation revealed leukocytosis and S. aureus positive blood and urine cultures along with bilateral complete cervical ribs showing pseudoarthrosis of anterior left cervical rib. A collection was noted in the left scalene muscle near the pseudoarthrosis accompanying focal edema suggesting osteomyelitis. Transthoracic echocardiogram (TTE) ruled out infective endocarditis. Thoracic surgery recommended conservative management, and appropriate antibiotics were given, which resulted in the negative culture on day 6. The patient was discharged on appropriate analgesia, and her pain was significantly improved on discharge.ConclusionsThis is the first reported case of osteomyelitis in the cervical rib. This report also highlights the possibility of cervical ribs having a familial origin. Additionally, as in our patient, certain exercises can be a risk factor for inducing TOS in patients with cervical rib.


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