Yokenella regensburgei, a novel pathogen in farmed American alligators

2022 ◽  
pp. 030098582110691
Author(s):  
Gayathriy Balamayooran ◽  
Clark Cooper ◽  
Narayan C. Paul ◽  
Pamela J. Ferro ◽  
Laura Rice ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Respiratory Tract ◽  
Alligator Mississippiensis ◽  
Target System ◽  
Primary Target ◽  
Gram Negative ◽  
In Vitro Sensitivity ◽  
American Alligators ◽  
Sensitivity Data

Increased acute mortality of farmed American alligators ( Alligator mississippiensis) was observed in various pens from 2 different farms in Louisiana over 2 years (2019-2021). A total of 14 alligators from multiple events of increased mortality were subjected to postmortem investigations. Except for one alligator with acute neurologic signs, no premonitory signs were observed. All animals had pneumonia (14/14), coelomitis (14/14), and intravascular short Gram-negative bacilli (14/14). Myocarditis (13/14) was common. Yokenella regensburgei was isolated from all alligators tested (13/13). These data suggest the respiratory tract may be a primary target system and could be involved in transmission, either through exhaled bacteria or through swallowing of contaminated respiratory fluids with passage through the feces. Available sensitivity data for Y. regensburgei in this study indicates in vitro sensitivity to aminoglycosides, fluoroquinolones, chloramphenicol, and trimethoprim/sulphamethoxazole antibiotics. Yokenella regensburgei should be included in the differential diagnosis of septicemia and acute death in alligators.

IN-VITRO SENSITIVITY TO MECILLINAM OF MULTIRESISTANT GRAM-NEGATIVE RODS

The Lancet ◽  
1978 ◽  
Vol 311 (8057) ◽  
pp. 214-215 ◽  
Author(s):  
B. Chattopadhyay ◽  
Elizabeth Thomas
Keyword(s):  
Gram Negative ◽  
In Vitro Sensitivity

scholarly journals 1609. Epidemiology and Susceptibility to Imipenem/Relebactam of Gram-Negative Pathogens from Patients with Lower Respiratory Tract Infections – SMART United States 2017-2018

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S799-S799
Author(s):  
Sibylle Lob ◽  
Meredith Hackel ◽  
Katherine Young ◽  
Mary Motyl ◽  
Daniel F Sahm
Keyword(s):  
Respiratory Tract ◽  
Lower Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Surveillance Program ◽  
Lower Respiratory Tract Infections ◽  
Independent Contractor ◽  
Gram Negative ◽  
The Us ◽  
Tract Infections

Abstract Background Relebactam (REL) inhibits class A and C β-lactamases and was approved in the US combined with imipenem (IMI) and cilastatin for complicated urinary tract and intraabdominal infections. Using isolates collected as part of the global SMART surveillance program in the US, we evaluated the activity of IMI/REL against gram-negative pathogens (GNP) from patients with lower respiratory tract infections (LRTI), including a comparison of isolates from ICU and non-ICU wards. Methods In 2017-2018, 27 US hospitals each collected up to 100 consecutive aerobic or facultative GNP from LRTI patients per year. MICs were determined using CLSI broth microdilution and breakpoints. Results Among 3878 GNP isolates from LRTI, the most common species collected were P. aeruginosa (Psa, 33.3%), K. pneumoniae (10.9%), E. coli (10.4%), and S. marcescens (6.9%). Susceptibility of GNP is shown in the table. IMI/REL inhibited 93% of Psa and Enterobacterales, which included 174 isolates of Morganellaceae that are not expected to be susceptible to IMI or IMI/REL. S. marcescens also showed low susceptibility to IMI, with improved but still reduced activity upon addition of REL. IMI/REL inhibited 83% of all GNP combined, 7-18 percentage points higher than the comparator β-lactams. Of the tested comparators, only amikacin exceeded the activity of IMI/REL. Only Psa showed substantial differences in susceptibility between isolates from ICU (n=486) and non-ICU wards (n=611), with 63.4% and 70.2%, respectively, susceptible to IMI, 71.6/78.7% to cefepime, and 64.2/73.3% to piperacillin/tazobactam (P/T). Susceptibility to IMI/REL was high in both settings (91.4/93.6%). Among Enterobacterales, susceptibility was generally similar in ICU and non-ICU wards (IMI/REL, 92.5% in both settings; IMI, 86.3 and 87.1%, respectively; cefepime, 89.9/89.0%; P/T, 88.7/87.4%). Table Conclusion Although resistance rates have frequently been reported to be higher in ICU than non-ICU wards, this pattern was seen in the current study only among Psa isolates. IMI/REL showed activity >90% against both Enterobacterales and Psa from both ward types. These in vitro data suggest that IMI/REL could provide an important treatment option for patients with LRTI in the US, including those in ICUs. Disclosures Sibylle Lob, PhD, IHMA (Employee)Pfizer, Inc. (Consultant) Katherine Young, MS, Merck & Co., Inc. (Employee, Shareholder)Merck & Co., Inc. (Employee, Shareholder) Mary Motyl, PhD, Merck & Co, Inc (Employee, Shareholder) Daniel F. Sahm, PhD, IHMA (Employee)Pfizer, Inc. (Consultant)Shionogi & Co., Ltd. (Independent Contractor)

scholarly journals Ability of Microorganisms, Causing Respiratory Infections in Children, to Form Biofilms in vitro

2021 ◽  
Vol 6 (1) ◽  
pp. 177-183
Author(s):  
H. O. Isaieva ◽  
◽  
M. M. Mishyna ◽  
Y. A. Mozgova ◽  
M. O. Gonchar ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Respiratory Tract ◽  
Optical Density ◽  
Respiratory Diseases ◽  
Respiratory Tract Infections ◽  
Respiratory Infections ◽  
Gram Positive ◽  
Gram Negative ◽  
Tract Infections

The purpose of the study was to detect ability to form biofilms by microorganisms that cause respiratory tract infections. Materials and methods. The study involved 97 strains of microorganisms. Microorganisms were isolated from children with respiratory tract infections. All strains, isolated from patients, were able to form biofilms. There were 44 strains of S. aureus (from patients with pneumonia – 13 strains, from patients with other respiratory diseases – 31), 34 strains of S. pneumoniae (pneumonia – 27 strains, other respiratory diseases – 7), 13 strains of K. pneumoniae (pneumonia – 6 strains, other respiratory diseases – 7), 6 strains of P. aeruginosa (pneumonia – 5 strains, other respiratory diseases – 1). Children were treated at the pulmonary department and intensive care unit in Kharkiv Regional Children's Clinical Hospital. Results and discussion. The optical density of primary biofilms formed by Gram-positive microorganisms was 1.33±0.24 Units of OD, and their secondary biofilms was 0.32±0.10 Units of OD. In patients with pneumonia optical density of primary biofilms of Gram-positive microorganisms was 1.48±0.21 Units of OD and of secondary biofilms was 0.30±0.08 Units of OD. Optical density of primary biofilms of Gram-positive microorganisms in patients with other respiratory infections was 1.18±0.15 Units of OD, of secondary biofilms was 0.35±0.12 Units of OD. The optical density of primary biofilms formed by Gram-negative microorganisms was 2.01±1.03 Units of OD, optical density of secondary biofilms was 1.06±0.42 Units of OD. In patients with pneumonia optical density of primary biofilms of Gram-negative microorganisms was 2.57±0.87 Units of OD, of secondary biofilms was 1.21±0.50 Units of OD. Optical density of primary biofilms of Gram-negative microorganisms in patients with other respiratory infections was 1.24±0.66 Units of OD, of secondary biofilms was 0.84±0.11 Units of OD. Conclusion. Gram-negative microorganisms in general formed more massive biofilms compared with Gram-positive microorganisms. Among all microorganisms P. aeruginosa formed the thickest primary and secondary biofilms. Strains of P. aeruginosa isolated from patients with pneumonia formed the thickest primary and secondary biofilms. Strains of S. aureus isolated from patients with other respiratory infections formed most massive primary biofilms, strains of K. pneumoniae formed the hardest secondary biofilms in this group

IN OVO AND IN VITRO SUSCEPTIBILITY OF AMERICAN ALLIGATORS (ALLIGATOR MISSISSIPPIENSIS) TO AVIAN INFLUENZA VIRUS INFECTION

2015 ◽  
Vol 51 (1) ◽  
pp. 187-198 ◽  
Author(s):  
Bradley L. Temple ◽  
John W. Finger ◽  
Cheryl A. Jones ◽  
Jon D. Gabbard ◽  
Tomislav Jelesijevic ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Virus Infection ◽  
Avian Influenza ◽  
Avian Influenza Virus ◽  
Influenza Virus Infection ◽  
Alligator Mississippiensis ◽  
In Ovo ◽  
In Vitro Susceptibility ◽  
American Alligators
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