Sanaz Rajabi Khamseh* and Abdolrazagh Danesh Shahraki
Received:October 25, 2021; Published:November 24, 2021
*Corresponding author: Falin Chen, Clinical Microbiology Laboratory, Fujian Provincial Hospital, China
Keywords: Azotobacter; Bacillus; Drought; Germination; Oilseed
A 33-year-old woman underwent a physical examination at the
Department of Gynecology and was found to have uterine fibroids.
She was admitted for laparoscopic removal of the uterine fibroids
under general anesthesia. During the operation, there was a small
amount of dark red ascites in the pelvic cavity, a part of the intestine
was densely adhered to the right pelvic wall, and the uterus was
enlarged to the size of 10 weeks gestation, with an uneven surface.
There was a fibroid tumor measuring approximately 7 × 8 × 8 cm
on the posterior wall of the uterus, which was hard with clear
boundaries. Two vesicular clear-fluid cysts with a diameter of 1-1.5
cm were seen on each fallopian tube. Due to the large posterior
wall myoma and difficulty in suturing, the patient was considered
barren; hence, abdominal myomectomy and pelvic adhesiolysis
were selected, followed by indwelling catheterization. On the first
day after surgery, the patient felt cold and was shivering, with a
temperature of 38.5°C and lower abdominal pain. There was no
sign of infection in the abdominal incision. When the indwelling
catheter was removed, there was no urethral inflammation
observed and the patient was able to urinate without difficulty.
Blood was immediately drawn for culture and biochemical tests,
which revealed low levels of sodium, calcium, and magnesium, and
abnormal coagulation function. The level of original calcitonin was
normal. The blood culture was positive after 15.3 hours in a nutrient
solution for gram-negative bacilli. A diagnosis of sepsis was made
based on the clinical features and laboratory values. Gram staining
revealed short Gram-negative bacilli (Figure 1A). The blood culture
plate showed gray and white colonies with good growth (Figure
1B). The chocolate culture plate showed poor growth (Figure 1C),
while the MacConkey plate did not show any organism growth.
(Figure1A) Gram staining (1,000×) of Acinetobacter schindleri showing short, straight Gram-negative bacilli. (Figure1B) Good growth of gray and white colonies after culture on Columbia agar with 5% sheep’s blood after 48 h of incubation. (Figure1C) Poor growth of gray and white colonies after culture on chocolate agar after 48 h of incubation. (Figure1D) No growth after culture on MacConkey agar. As bacterial identification was not possible with the VITEK II automatic bacterial analyzer (BioMerieux, Craponne, France), the VITEK-MS mass spectrometer (BioMerieux) was used to identify the bacteria as Acinetobacter schindleri. The results of the drug sensitivity testing for A. schindleri, based on the American Society for Clinical Laboratory Standardization (2017), were as follows: amoxicillin/papaulic acid 2 μg/ml, amikacin 2 μg/ ml, ciprofloxacin 0.25 μg/ml, cefoperazone/sulbactam 34 μg/ ml, cefepime 1 μg/ml, gentamicin 1 μg/ml, imipenem 1 μg/ml, levofloxacin 0.25 μg/ml, minocycline 28 μg/ml, sulfamethoxazole 20 μg/ml, tigecycline 0.5 μg/ml, tobramycin 1 μg/ml, and piperacillin/ tazobactam 4 μg/ml. A. schindleri was resistant to amoxicillin/ papaulic acid and sensitive to all others. In addition, 16SrRNA was used to identify the bacteria, and the sequence comparison analysis results were A. schindleri (NR025412.1) 99.22% and Acinetobacter haemolyticus (NR117622.1) 97.59%. The patient responded well to cefoperazone/sulbactam and metronidazole antibiotic treatment. After 5 days of treatment, the patient had normal body temperature, improved symptoms, and negative blood cultures; she was discharged two weeks later.
Figure 1: (1A) Gram staining (1,000×) of Acinetobacter schindleri showing short, straight Gram-negative bacilli. (1B) Good growth of gray and white colonies after culture on Columbia agar with 5% sheep’s blood after 48 h of incubation. (1C) Poor growth of gray and white colonies after culture on chocolate agar after 48 h of incubation. (1D) No growth after culture on MacConkey agar.
A. schindleri was first reported in . A. schindleri is a nonmotile,
aerobic, gram-negative bacterium that can grow on dry
surfaces for a long time  and exist in a wide range of natural
environments, such as soil and water, as well as in hospitals .
The strains can be isolated from body surfaces of patients, and their
presence in patient specimens (vagina, cervix, throat, nasal cavity,
or urine) is usually clinically insignificant . In 2012, a case was
reported of A. schindleri carrying bla-NDM-1 found in the groin
area of a 22-year-old man who had suffered an explosion injury
during the war in Afghanistan; however, the clinical significance of
this finding was not mentioned . Studies have found that 80% of
cases of catheter-related bacteremia show growth of A. schindleri
in blood cultures; the endovascular device acts as a portal for A.
schindleri blood infection . A. schindleri is a gram-negative
opportunistic pathogen that is prevalent in intensive care units and
affects immunocompromised patients, thus leading to nosocomial
infections and global outbreaks . Compared with laparoscopic
hysterectomy, traditional open myomectomy can reduce the blood
supply to the anastomotic branches of the uterine and ovarian
arteries causing poor local uterine blood circulation and increased
vascular permeability, which can cause the bacteria to colonize
the uterus and invade the bloodstream . Due to the complex
anatomical structure of the pelvic cavity and the large surgical
wound, open surgery can easily cause body injury and immune
suppression; the surgical process also increases the probability
of opportunistic pathogen invasion. The patient had a history of
human papillomavirus infection, a high-risk factor for cervical
The occurrence of tumor development is closely related to the body’s immune function; when there is progressive tumor growth, immune function is restrained. Therefore, in cases such as large trauma surgery, severe postoperative complications in patients with all the above factors can cause low immunity, leading to opportunistic pathogens like A. schindleri infection. The only microorganism isolated from the blood culture of our patient was A. schindleri, indicating that it was the pathogen causing the patient’s postoperative sepsis. Blood culture remains the gold standard for the diagnosis of sepsis. Since 1986, the classification of Acinetobacter has undergone extensive revisions, with the discovery of a wide variety of species; however, studies have found that it is impossible to identify specific species of Acinetobacter by phenotype . A. schindleri can be identified by a VITEK - MS spectrometer. However, clinical microbiology laboratories should be aware that while A. schindleri grows well in blood culture plates, it grows poorly in chocolate culture plates, and not at all in MacConkey plates. The risk factors for Acitenobacter infection are low immunity, underlying health conditions, and a history of human papillomavirus infection. Clinical attention should be paid to the implementation of active perioperative nursing care, strict aseptic operation, and reduction of postoperative nosocomial infections.
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Department of MedicineUniversities of Bradford, UK
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Analytical ChemistryWentworth Institute of Technology, USA
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