Mycoplasma Serology Research Articles

Psychiatric Manifestations Caused by Mycoplasma pneumoniae Encephalitis Mimicking Autoimmune Encephalitis

AbstractA significant etiological factor for upper respiratory tract infections and community-acquired pneumonia is Mycoplasma pneumoniae. The incidence of extrapulmonary neurological problems in infected patients has been shown to range from 0.1 to 7%, often manifesting within a timeframe of 2 to 14 days following the onset of respiratory symptoms. Acute disseminated encephalomyelitis, Guillain–Barré syndrome, and transverse myelitis are among the immune-mediated illnesses encompassed under the syndrome. A 3-year-old male child exhibited symptoms of acute encephalopathy and behavioral disruption subsequent to an infection caused by M. pneumoniae. He presented with irritability, sleep disturbance, slurred speech, increased appetite, episodes of unresponsiveness, moving in circles, staring, and laughing episodes lasting for up to 15 to 30 minutes over a week. He lost his previous toilet training. Abnormal jerks were noted while awake and asleep. Symptoms were preceded by exposure to vague febrile illness 3 weeks prior to presentation. The patient's brain magnetic resonance imaging was normal. Electroencephalography showed a slow background with no epileptiform discharges. Cerebrospinal fluid analysis and polymerase chain reaction for viruses were negative. The workup for autoimmune encephalitis was negative. Mycoplasma serology IgM was detected. Marked improvement was noted after methylprednisolone pulse therapy, intravenous immunoglobulin, valproic acid, and azithromycin. In conclusion, our report serves as a reminder that M. pneumoniae infection is a possible cause of encephalopathy and behavioral disturbance in children. Early recognition and promotion of immunomodulatory and antimicrobial treatment can prevent the affected child from experiencing different levels of long-lasting impairments in cognitive, physical, or visual abilities.

Mediastinal Mass with Unusual Etiology.

Mediastinal Mass with Unusual Etiology.

A rare case of bilateral optic neuritis and acute disseminated encephalomyelitis post mycoplasma pneumoniae infection

A case of a 4-year-old boy who developed acute disseminated encephalomyelitis (ADEM) and optic neuritis (ON) following Mycoplasma pneumoniae infection is reported. His symptoms, including excessive sleepiness, frontal headache, bilateral vision impairment, retro-auricular pain and unbalanced gait, were resolved after methylprednisolone pulse therapy, intravenous immunoglobulin (IVIG) and ciprofloxacin. Cerebrospinal fluid myelin basic protein (MBP) and Mycoplasma serology IgM were detected in our patient. This is the first report of a child with ADEM and ON associated with mastoditis caused by M. pneumoniae infection. Combined immunomodulatory therapy (pulse steroids and immunoglobulin) with anti- mycoplasma microbial therapy resulted in favorable visual recovery. Bilateral isolated optic neuritis as the first presenting feature in childhood ADEM is rare and requires proper evaluation and early therapeutic management. This case highlights the need for physician awareness of the association of mycoplasma infection with optic neuritis and ADEM.

Multifocal thrombosis with peripheral gangrene in a young boy: Mycoplasma infection triggered cold agglutinin disease

Cold agglutinin disease (CAD) is extremely rare in children. We report an 8-year-old boy who presented with gangrene of right foot with hypertension and absent lower limb pulses. Blood peripheral smear evidence of autoagglutination and falsely elevated red blood cell indices were suggestive of CAD and on subsequent investigations he was found to have high titres of cold agglutinin antibodies. He also had evidence of pneumonia on chest X-ray and serology for mycoplasma was positive. Computed tomography angiography showed multifocal thrombotic occlusion in bilateral popliteal arteries. He was effectively managed using antimicrobials, warm clothing, aspirin, anticoagulation and corticosteroids. He remains clinically well on follow-up and had no recurrence. CAD presenting with peripheral gangrene is extremely unusual. A careful look at peripheral blood smear gives an initial diagnostic clue. CAD triggered by infection is often self-limiting and requires supportive care.

Chronic infection with Chlamydia pneumoniae in asthma: a type-2 low infection related phenotype

BackgroundChlamydia pneumoniae and Mycoplasma pneumoniae have been implicated in the pathogenesis of asthma and are responsible for chronic inflammation when host immune system fails to eradicate the bacteria.MethodWe performed a prospective study on 410 patients who underwent a visit at the asthma clinic of CHU of Liege between June 2016 and June 2018 with serology testing for C. pneumoniae and M. pneumoniae.Results65% of our asthmatic population had serum IgA and/or IgG towards C. pneumoniae, while only 12.6% had IgM and/or IgG against M. pneumoniae. Compared to seronegative asthmatics, asthmatics with IgA+ and IgG+ against C. pneumoniae were more often male and older with a higher proportion of patients with smoking history. They received higher doses of inhaled corticosteroids (ICS) and displayed lower FEV1/FVC ratio, higher RV/TLC ratio and lower conductance. They had higher levels of fibrinogen, though in the normal range and had lower sputum eosinophil counts. Patients with IgA− and IgG+ against C. pneumoniae were older and had higher blood monocyte counts and alpha-1-antitrypsin levels as compared to seronegative patients. Patients with IgM and/or IgG towards M. pneumoniae were more often males than seronegative asthmatics. In a subpopulation of 14 neutrophilic asthmatics with Chlamydia pneumoniae IgA + /IgG + treated with macrolides, we found a significant decrease in blood neutrophils and normalization of sputum neutrophil count but no effect on asthma quality of life and exacerbations.ConclusionPositive Chlamydia serologic test is more common than positive Mycoplasma serology. Asthmatics with IgA and IgG against C. pneumoniae have more severe disease with increased airway obstruction, higher doses of ICS, more signs of air trapping and less type-2 inflammation.

Mycoplasma-Induced Rash and Mucositis or Steven-Johnson Syndrome.

Mycoplasma-induced rash and mucositis (MIRM), has been recently distinguished as an entity distinct from the spectrum of Steven-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN). It is characterized by a younger age of onset, predominant mucosal lesions and sparse skin involvement, in contrast to widespread cutaneous lesions in TEN/SJS. While therapy with azithromycin and a short course of corticosteroids suffices in the majority of cases, intravenous immunoglobulin and cyclosporine may be useful in refractory cases. The authors report a 6-y-old girl with mucopurulent conjunctivitis, hemorrhagic oral mucosal crusting, maculopapular skin rash, and positive serology for Mycoplasma pneumoniae. The girl recovered following therapy with azithromycin and oral prednisolone. The index case is instructive in highlighting a rare complication of a common infection, and delineates the importance of clinical suspicion and a systematic approach to evaluation and management of MIRM in patients with unusual mucosal lesions and skin rash.

Herpes associated erythema multiforme: A retrospective study.

Erythema multiforme (EM), an acute dermatologic condition frequently encountered in the Emergency Department, classically presents with a targetoid rash. We reviewed all recent EM cases seen at the LAC-USC County Hospital in order to ascertain the proportion of Herpes associated EM (HAEM) cases and to inform the diagnostic workup of these patients. ICD-9 and ICD-10 codes were used to extract a list of EM cases at our institution from 2013 to 2019. Two non-blinded abstractors screened records to confirm an EM diagnosis and entered patient data utilizing a standardized data abstraction form. Cohen's kappa statistic was used to measure inter-rater reliability on various variables. Kappa (κ) values ranged from 0.803 to 1.0. 70 pediatric and 56 adult EM patients were included in the study. A likely etiology was ascribed to 63% of pediatric and adult EM cases. Pediatric EM was most commonly attributed to upper respiratory infection (URI) (n=23; 33%), Mycoplasma pneumoniae infection (n=5; 7%), and medications (n=4; 6%). Adult EM was most commonly attributed to HSV infection (n=11; 20%), medications (n=5; 9%), URIs (n=4; 7%), and other infections (n=4; 7%). HSV-1/2 serologic testing should be considered in most EM patients to potentially prevent repeated ED visits. In EM cases not clearly attributable to herpes or drug exposure, physicians can consider further workup: Mycoplasma serology, nasal PCR, and a respiratory viral panel in pediatric patients. Identification of an etiologic cause may suggest a different treatment approach and prevent mislabeling of medication allergies in patient charts.

Clinical factors influencing the performance of bacterial multiplex polymerase chain reaction in patients with community-onset pneumonia.

The etiologic diagnostic yield of community-onset pneumonia (COP) using conventional methods is low. Bacterial multiplex polymerase chain reaction (mPCR) has been shown to be more sensitive than conventional methods. This study assessed the clinical factors influencing bacterial mPCR results in patients with COP. Patients with COP admitted to a tertiary care hospital between November 2015 and April 2016 were retrospectively assessed. Conventional methods included culture-based methods and serology for Mycoplasma pneumoniae. Bacterial mPCR that could identify Streptococcus pneumoniae, Haemophilus influenzae, Mycoplasma pneumoniae, and Legionella pneumophilia was performed. Bacterial mPCR was performed in a total of 342 patients with COP in the study. Bacterial mPCR alone provided etiology in 99 patients. The total etiologic diagnosis rates improved from 22.2 to 51.1% when bacterial mPCR was added to conventional methods. Additional diagnostic benefits of bacterial mPCR were more prominent in the prior antibiotic non-exposure group (77.8% vs 63.5%, P = 0.015) and in the low-risk group with low CURB 65 score (62.6% vs 44.9%, P = 0.005). Patients who required ICU care, those with healthcare-associated pneumonia (HCAP), and patients with any underlying diseases were not associated with the additional pathogen detection rates using bacterial mPCR. By supplementing conventional diagnostic methods with bacterial mPCR-based methods, the overall pathogen detection rates improved in patients with COP. Moreover, the additional diagnostic usefulness of bacterial mPCR was significantly higher in patients without prior antibiotic exposure and in the mild-to-moderate-risk group with lower CURB 65 score.

Polymorphic erythema associated with mycoplasma pneumoniae.

Image in medicine Male child, 6 and a half years old, followed for psychomotor delay from the age of 2 years with diagnosis of epilepsy put on sodium valproate for 3 years and in the absence of seizure control carbamazepine was added 2 months before admission. The patient had presented 5 days before his consultation a generalized erythematous rash with edemas of two lower limbs, a dry cough and a fever. He was initially treated as a meningococcemia. On skin examination: generalized erythematous lesions with a rosette appearance, vesicular lesions in the lips. On admission to the service, the patient was put on acilovir, josamycin with discontinuation of carbamazepine. HSV 1 and 2 serology returned negative. Mycoplasma serology was positive for IgM and negative for IgG. The chest X-ray was normal. The skin biopsy was in favor of superficial dermatitis. The evolution was favorable with progressive disappearance of the lesions. Aciclovir was discontinued due to the rapid improvement and negativity of serology and josamycin was discontinued after 14 days of treatment. The general condition improved in 48 hours and the skin lesions disappeared in 15 days. Figure 1 polymorphic erythema associated with mycoplasma pneumoniae in a child of six and half years old

Latin American chronic urticaria registry (CUR) contribution to the understanding and knowledge of the disease in the region

Chronic urticaria (CU) has a widespread spectrum on causal or exacerbating factors, clinical manifestations, therapeutic response and quality of life affectation. Registries are useful tools in several real-life diagnosis and management approach.We aimed to evaluate the characteristics of CU patients living in Latin America through an original cross-sectional registry with data entered by regional allergologists. ResultsThree hundred patients were included, being 72% female, with median age of 36 years (1–85) and 20 months of CU median evolution time. The cause of CU was reported as unknown in 72% of them.Thirty-nine percent of suspected cases presented positive serology for Mycoplasma, positive autologous serum skin test (ASST) was reported in 47%, and occasional presence of thyroid or antinuclear autoantibodies and parasites. The impact of pruritus in their quality of life was moderate to severe in 60% of patients, with almost 3 out of four patients having partial or lack of urticaria control with anti-histamines. ConclusionsOur registry provides retrospective data on the real-life assistance of a large number of patients from the region. Continuous search for associated conditions and better treatment possibilities are needed, in order to control the significant impact on quality of life and the length of disease.

Microbial etiology in hospitalized North Indian adults with community-acquired pneumonia.

Background:There is a paucity of literature regarding the microbial etiology of community-acquired pneumonia (CAP) in India. The current study was aimed to study the microbial etiology of hospitalized adults with CAP.Methods:The study was conducted in a 700-bedded North Indian hospital. Consecutive adults admitted with CAP over a period of 2 years from 2013 to 2015 were recruited for the study, and apart from clinical evaluation underwent various microbiological studies in the form of blood culture, sputum culture, urinary antigen for pneumococcus and Legionella, serology for Mycoplasma and Chlamydia and real-time reverse transcriptase polymerase chain reaction for influenza viruses. Radiographic studies were performed in all patients and repeated as required. The patients were treated with standard antibiotic/antiviral therapy and outcomes were recorded.Results:A total of 225 patients (median age: 59 years) were enrolled. Streptococcus pneumoniae was the most common organism found (30.5%), followed by Legionella pneumophila (17.5%), influenza viruses (15.4%), Mycoplasma pneumoniae (7.2%), Chlamydia pneumonia (5.5%), Mycobacterium tuberculosis (4.8%), Klebsiella pneumoniae (4.8%), methicillin-resistant Staphylococcus aureus (3.5%), Pseudomonas aeruginosa (3.1%), methicillin-sensitive S. aureus (1.7%), and Acinetobacter sp. (0.8%) with 4% of patients having multiple pathogens etiologies. High Pneumonia Severity Index score correlated with the severity and outcome of the CAP but was not predictive of any definite etiological pathogen. In-hospital mortality was 8%.Conclusion:Streptococcus pneumoniae, Legionella, and influenza constitute the most common etiological agents for north Indian adults with CAP requiring hospitalization. Appropriate antibiotic therapy and preventive strategies such as influenza and pneumococcal vaccination need to be considered in appropriate groups.

Detection rate of Pneumococcal Pneumonia using the Urine Antigen Kit BinaxNow Streptococcus Pneumoniae Test: a Prospective Cohort Study in a Tertiary Hospital in Malaysia

Background: Pneumococcal pneumonia is the commonest type of bacterial pneumonia worldwide. In Malaysia, the reported incidence of pneumococcal pneumonia is low. This may be due to poor sensitivity of conventional methods. The use of BinaxNOW, a urinary antigen test for Streptococcus pneumoniae can aid in the diagnosis of pneumococcal pneumonia. Objective: To determine the detection rate of pneumococcal pneumonia using BinaxNOW kit and to compare this with the conventional culture method for blood and sputum. Methods: This was a prospective cohort study involving patients 18 year-old and above admitted for community-acquired pneumonia (CAP) or health-care associated pneumonia (HCAP) to UKMMC between December 2011 and June 2012. BinaxNOW test, serology for Mycoplasma, Legionella and Chlamydia and cultures from blood/sputum/other respiratory tract samples and other routine investigations were performed. Results: A total of 102 patients were recruited; 89 (87.3%) with CAP, 13 (12.7%) with HCAP. 57 (55.9%) had pneumonia of unknown aetiology, 11 patients (10.8%) had positive blood cultures, 8 patients (7.8%) had a positive urine BinaxNOW test and 6 patients (5.9%) had positive sputum cultures. Streptococcus pneumoniae was the commonest isolate accounting for 9 cases (8.8%) followed by Klebsiella pneumoniae in 7 cases (6.9%). 8 out of 9 patients with positive urine BinaxNOW test had negative cultures for Streptococcus pneumoniae. One patient grew Streptococcus pneumoniae from the tracheal aspirate however the urine BinaxNOW test was negative. Conclusion: The use of urine BinaxNOW kit in UKMMC increased the detection rate of pneumococcal pneumonia in hospitalized patients.

PS-374a Predictors Of Bacterial Community Acquired Pneumonia In Children: Preliminary Results From Capes (community Acquired Pneumonia Aetiology Study)

Background The majority of childhood community acquired pneumonia (CAP) in developing countries is believed to be bacterial in origin. However, the predictors of bacterial versus non-bacterial (viral) pneumonia are not clearly defined. This is essential for judicious use of antibiotic therapy. Objective To determine the microbiologic aetiology of childhood CAP in India, and determine the predictors of bacterial pneumonia. Methods Children (1 month -1 2 years) fulfilling World Health Organisation criteria for pneumonia (cough or difficult breathing, and tachypnea; for 2 011-March2013) surveillance programme. Pneumonia severity was assessed using WHO criteria. Nasopharyngeal aspirate (NPA) culture, blood culture, IgM anti-Mycoplasma pneumoniae and IgM anti-Chlamydia pneumoniae were examined. Demographic characteristics, clinical profile, presence of ‘risk factors’, clinical examination findings, and radiographic features were evaluated as predictors of bacterial aetiology. Results 2333 children with CAP were enrolled. 61% were 5–12 years. Figure 1 presents the pneumonia severity. Bacterial pathogens were isolated in 12.7% NPA cultures with Pneumococcus (n = 223), Staphylococcus aureus (n = 27), and Haemo philus influenzae (n = 23) predominating. Blood culture yielded bacteria in only 3.3%. S. aureus (n = 25), Gram negative bacilli (n = 21), and Alpha-hemolytic Streptococcus (n = 15) predominated. Pneumococcus (n = 3) accounted for a minority. Serology for Mycoplasma and Chlamydia were positive in 4.4% and 1.6% samples respectively (Figure 2A,2B). Table 1 highlights the unadjusted odds ratio for various factors explored as predictors of bacterial aetiology. Exposure to over-crowding at home appeared to be associated with a lower risk of bacterial aetiology, whereas exposure to tobacco smoke was associated with higher risk. None of the other factors predicted bacterial aetiology. Conclusion The majority of childhood community acquired pneumonia appears to be non-bacterial in origin. Bacterial aetiology could not be predicted by demographic, clinical, or radiographic features, that are usually believed to be associated with bacterial aetiology.

Relevance of serology for Mycoplasma pneumoniae infection among children with persistent cough.

Mycoplasma pneumoniae is an important cause of upper and lower respiratory tract infections. Cough and tracheobronchitis are the commonest features of M. pneumoniae infection but diagnosis based on clinical symptoms that may be due to other respiratory pathogens is impossible. Thus laboratory testing for M. pneumoniae is particularly important. Correct and rapid diagnosis of M. pneumoniae infections is of prime importance to introduce appropriate antibiotic treatment. Evaluation of the incidence of IgM and IgG antibodies specific to M. pneumoniae among children with pneumonia and/or chronic cough. Serum samples from 148 children with a history of chronic cough (lasting at least one month), recurrent respiratory tract infections, allergic rhinitis, and/or inflammatory changes on X-chest ray. First, all sera were screened for specific anti-M. pneumoniae antibodies using agglutination test following the detection of specific IgM and IgG anti-M. pneumoniae antibodies using immunoenzymatic assays. Out of the 148 serum samples, 57 (38.5%) gave positive screening results. However, the presence of M. pneumoniae-specific IgM and/or IgG antibodies was confirmed by immunoenzymatic assays in only 30 (52.6%) of these 57 positive samples. These results indicated that in as many as 27 (47.4%) out of the 57 serum samples screened, false-positive results occurred. Evaluation of acute- and convalescent-phase sera is necessary to make possible accurate interpretation of the serological testing results.

Necrólisis epidérmica tóxica asociada a infección aguda por Mycoplasma pneumoniae

Erythema multiforme, Stevens-Johnson syndrome and toxic epidermal necrolysis represent different manifestations of the same spectrum of severe idiosyncratic cutaneous reactions to drugs and to a lesser extent are associated with infectous agents. Among these, Mycoplasma pneumoniae is one of the most frequent. We report the case of a female patient aged 5 years, with a toxic epidermal necrolysis associated with Mycoplasma pneumoniae infection, which begins with a fever accompanied by a generalized rash with involvement of the mucous membranes. IgM serology for Mycoplasma pneumoniae was positive and initial biopsy was compatible with erythema multiforme major. The patient was treated with corticosteroids, intravenous immunoglobulin, plasmapheresis and strict care to prevent superinfection and sequels. After 31 days of hospitalization the patient was discharged from hospital.

Index of Suspicion * Case 1: Irritability and Signs of Peritonitis in a Neonate * Case 2: Red Eye, Excessive Tearing, Photophobia, Irritability, and Splenomegaly in an Infant * Case 3: 2-year-old Girl Who Has Cough, Right Pulmonary Abnormalities

* ALL: : acute lymphoblastic leukemia CT: : computed tomography IVC: : inferior vena cava NA: : neonatal appendicitis NEC: : necrotizing enterocolitis WBC: : white blood cell A 7-day-old boy born at term is brought to the emergency department by his foster mother for refusal to feed for ∼20 hours and increased crying, although he is intermittently consolable. When given his bottle, the infant starts to suck but then cries as though in pain. He has not vomited, and his last bowel movement was yesterday. The stool has been moderately well formed without blood or mucus, and wet diapers have continued. There is no history of respiratory symptoms, lethargy, rashes, or jaundice. The biological mother is a 27-year-old woman with a known history of previous drug abuse; she had received some prenatal care. This infant was born by scheduled cesarean delivery. Initial physical examination reveals a crying but consolable neonate. His temperature is 37.7°C, heart rate is 170 beats/minute, and respiratory rate is 56 breaths/minute; the remainder of his findings are normal. His complete blood count (white blood cell [WBC] 11.7 × 109/L, 78.5% neutrophils, 11.4% monocytes, 9.8% lymphocytes), serum concentrations of electrolytes and glucose, urinalysis, and cerebrospinal fluid studies are normal. Cultures are obtained. An abdominal radiograph is normal and abdominal ultrasonography reveals trace pelvic fluid. He is given a bolus of normal saline and is started on antibiotics to treat possible sepsis. A few hours after admission, repeat examination is concerning for inconsolability, poor suck reflex, and lethargy. His abdomen is distended, firm, and tender to palpation. Bowel sounds are normal. Further studies are performed that reveal the diagnosis. A previously healthy 10-month-old boy is seen for a 2-week history of an erythematous left eye with tearing. Earlier, he was diagnosed as having conjunctivitis at an urgent care clinic and was treated with a 10-day course of polymyxin B/trimethoprim eye drops without improvement. He has felt warm intermittently but has not had a …

Fulminate mycoplasma infection and severe cutaneous vasculitis: an unusual presentation of complete MBL deficiency

A 12 year old Caucasian female presented with malaise, pyrexia and painful bullous hemorrhagic skin lesions on both upper and lower extremities. She was the second child of a healthy unrelated Caucasian couple and her past medical history was unremarkable. Laboratory tests showed raised inflammatory markers and chest radiograph showed a left lower lobe collapse. She was started on intravenous broad spectrum antibiotics and steroids, with a provisional diagnosis of vasculitis secondary to infection. Autoimmune tests (including ANCA) were negative and she had no evidence of systemic vasculitis. Given the extent of the cutaneous lesions, tests looking at the immune system and for an infection precipitant were performed. Fluid aspirate from the lesion was sterile and skin biopsy showed non specific inflammation. Mycoplasma serology titers were extremely high 1:5200 and the patient had complete mannose binding lectin deficiency (MBL). She was treated with macrolides and was started on chemoprophylaxis. Mannose binding lectin (MBL) is a serum protein believed to play an important role in the innate immune response. Defective MBL production is regarded as the most common immune deficiency in the general population, affecting approximately 5-7% of individuals. Severe MBL usually presents in the early infancy or in early childhood. Late presentation with severe clinical features such as this is not well documented. Patients with primary antibody deficiencies are susceptible to mycoplasma infections (mainly arthritis) due to defective function on the mannose binding lectin pathway. Conversely, mycoplasma is a common pathogen in the paediatric population whilst erythema multiforme associated with mycoplasma infection is a rare presentation. This case is first report in literature where complete MBL deficiency presented in late childhood with severe mycoplasma infection related severe cutaneous vasculitis and no previous history of recurrent infections.

Clinical and epidemiological characteristics of pediatric patients with positive serology for Mycoplasma pneumoniae, treated in the third level hospital from 2006 to 2008

Introduction: Infection by Mycoplasma pneumoniae is becoming more frequent at younger ages. It appears as a generally benign and unspecific clinical condition of respiratory symptoms and sometimes responsible for a broad spectrum of extrapulmonary manifestations. Objective: To describe demographic, clinical, laboratory, and treatment characteristics of pediatric-age patients with positive serology for M. pneumoniae diagnosed at the Pablo Tobón Uribe Hospital (HPTU) during the 2006-2008 period. Materials and methods: Observational, retrospective study, which describes the demographic, clinical, laboratory, and treatment characteristics of patients from 1 month to 14 years of age with positive IgM for M. pneumoniae seen at HPTU during September 2006 and November 2008. Results: We reviewed 305 clinical charts of patients with positive IgM for M. pneumoniae. The average age was 5.15 years ± 3.62 SD. Cough (87.5%), fever (65.9%), rhinorrea (39.3%), and respiratory difficulty (38%) were the most frequent clinical findings. Extrapulmonary compromise was mainly manifested in the skin (12.8%), the central nervous system (CNS) (3.6%), and osteomuscular system (3.9%). Auscultation and thoracic X-ray were normal in 33.1% and 30.8% of the patients, respectively. Episodes of asthma exacerbation were related to infection by Mycoplasma in 35% of the cases. A total of 51% of the patients required hospitalization with an average stay of seven days. All the patients received antibiotic treatment; clarithromycin (75.8%) was the antibiotic of choice. Conclusion: Infection by M. pneumoniae has a broad range of clinical manifestations, requiring a high index of clinical suspicion and an active search for extrapulmonary compromise given that in our realm there is no specific diagnostic method for the acute infection.

Clinical impact of combined viral and bacterial infection in patients with community-acquired pneumonia

New methods for identifying respiratory pathogens have led to several reports of a high yield of mixed infections in patients with community-acquired pneumonia (CAP). The clinical impact of these findings has, however, not been fully evaluated. We aimed to compare patients with a pure bacterial etiology with those with findings of both bacteria and virus regarding severity of illness and length of hospital stay. Adults with CAP admitted to Karolinska University Hospital were studied prospectively (N = 184). Microbiological methods included cultures from blood, sputum and nasopharyngeal secretions; sputum samples analyzed with quantitative real-time polymerase chain reaction for Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis; nasopharyngeal specimens analyzed with polymerase chain reaction and serology for Mycoplasma pneumoniae, Chlamydophila pneumoniae and viruses common in the respiratory tract; and urine antigen assays for detecting pneumococcal and Legionella pneumophila antigens. The pneumonia severity index (PSI) was used to assess the severity of illness. The likelihood of getting a score corresponding to PSI classes IV or V was higher in patients with findings of both bacteria and virus than in those with a bacterial pathogen alone (odds ratio 4.98, 95% confidence interval 2.09-11.89; p < 0.001). The median length of hospital stay was 7 days among patients with mixed infections and 4 days among those with a bacterial etiology alone (p = 0.018). Patients infected with a virus and a bacterial pathogen more often develop severe CAP and have a longer hospitalization than those with a bacterial etiology alone.

Systemic Adenovirus Infection in Sulawesi Tortoises (Indotestudo Forsteni) Caused by a Novel Siadenovirus

A novel siadenovirus was identified in the Sulawesi tortoise (Indotestudo forsteni). A group of 105 Sulawesi tortoises was obtained by the Turtle Survival Alliance. Many of the tortoises were in poor health. Clinical signs included anorexia, lethargy, mucosal ulcerations and palatine erosions of the oral cavity, nasal and ocular discharge, and diarrhea. Initial diagnostic tests included fecal testing for parasites, complete blood count and plasma biochemical analysis, mycoplasma serology, and polymerase chain reaction (PCR) testing for intranuclear coccidia and chelonian herpesvirus. Treatment included administration of antibiotics, antiparasitic medications, parenteral fluids, and nutritional support. Tissue samples from animals that died were submitted for histopathologic evaluation. Histopathologic examination revealed systemic inflammation and necrosis associated with intranuclear inclusions consistent with a systemic viral infection in 35 tortoises out of 50 examined. Fecal testing results and histopathologic findings revealed intestinal and hepatic amoebiasis and nematodiasis in 31 animals. Two of 5 tortoises tested by PCR were positive for Chlamydophila sp. Aeromonas hydrophila and Escherichia coli were cultured from multiple organs of 2 animals. The mycoplasma serology and PCR results for intranuclear coccidia and chelonian herpesvirus were negative. Polymerase chain reaction testing of tissues, plasma, and choanal/cloacal samples from 41 out of 42 tortoises tested were positive for an adenovirus, which was characterized by sequence analysis and molecular phylogenetic inference as a novel adenovirus of the genus Siadenovirus. The present report details the clinical and anatomic pathologic findings associated with systemic infection of Sulawesi tortoises by this novel Siadenovirus, which extends the known reptilian adenoviruses to the chelonians and extends the known genera of reptilian Adenoviridae beyond Atadenovirus to include the genus Siadenovirus.