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Streptococcal Infection

Gr.C %26 Gr.G Streptococcal Infections

Streptococcus pyogenes, a group A Streptococcus (GAS) species, is the most important human pathogen within the Streptococcus genus. The most common diseases caused by S. pyogenes are pharyngitis and skin conditions, with possible sequelae of poststreptococcal glomerulonephritis and acute rheumatic fever. Streptococci also have the ability to invade tissues and cause bacteremia. Recently an increase in Streptococcus group B infections has been observed.


Presentation

Many species belong to the Streptococcus genus, which are Gram-positive, nonmotile cocci. They can be classified according to more than one scheme [1]. Their hemolytic capabilities on sheep blood agar define their division into three groups (β-, α-, and γ-hemolytic streptococci). Further classification subdivides these groups according to cell wall carbohydrate antigens into A, B, C, and other groups. The most important representative is S. pyogenes, which is a group A (beta-hemolytic) streptococcus (GABHS).

S. pyogenes causes a variety of diseases, the most common being pharyngitis and skin infections. The manifestations of pharyngitis are variable, from mild discomfort at swallowing to exudative pharyngitis with high fever [2]. In addition to throat pain, the manifestations may include chills, headache, and, in young children, abdominal pain, and vomiting. The possibility of local suppurative complications, such as peritonsillar abscess, should be checked if there is an intense pain [2]. Rarely, the pharyngitis is associated with scarlet fever.

Scarlet fever used to be a serious complication of streptococcal pharyngitis, but with the use of antibiotics, it is not considered an important threat today. However, serious conditions can develop following streptococcal infections. One is acute poststreptococcal glomerulonephritis [3], which presents with edema, hypertension, hematuria, and other urinary abnormalities. The disease is on the decline. Another sequel is rheumatic fever, an autoimmune disease initiated by S. pyogenes but dependent on the host’s immune responses. The development of the disease is associated with certain serotypes of the M protein, a cell wall component of S. pyogenes. Rheumatic fever can present as an inflammation of the joints, heart, central nervous system, or skin [3]. A large proportion of acquired heart disease cases in children originates from rheumatic fever [4]. Neuropsychiatric disorders can also follow streptococcal infections.

Superficial manifestations of streptococcal infection, other than pharyngitis, are skin conditions, such as impetigo, and erysipelas.

The most serious consequences of streptococcal infections stem from their ability to cause invasive diseases. These include sepsis, bacteremic pneumonia, necrotizing fasciitis and streptococcal toxic shock syndrome. Most of the mortality from streptococcal infections is associated with invasive disease and rheumatic fever [5]. The characteristics of an invasive streptococcal disease include systemic toxicity, hypotension, shock, multiple organ failure, rapid necrosis, and gangrene [3]. Several bacterial factors (for example pyrogenic exotoxins and nucleases) are thought to contribute to the pathogenesis of an invasive disease. [3].

Group B Streptococcus infections, caused by Streptococcus agalactiae, were thought to occur mainly in women after childbirth and in newborn babies. However, recently, the infection has appeared in nonpregnant adults, usually associated with comorbidities.

Fever
  • Rheumatic fever can present as an inflammation of the joints, heart, central nervous system, or skin. A large proportion of acquired heart disease cases in children originates from rheumatic fever.[symptoma.com]
  • Thirty-one (66%) women had fever as their sole presenting symptom, eight (17%) had fever and abdominal pain, seven (15%) had fever and abnormal vaginal bleeding, and one patient (2%) presented with a rash.[ncbi.nlm.nih.gov]
  • Abstract We described a 21-year-old Japanese patient with sore throat, fever, and diffuse erythema on the neck, trunk, and limbs. Erythema markedly appeared on the neck, axillary, antecubital, and popliteal fossae.[ncbi.nlm.nih.gov]
  • He had persistent fever (39.5 degrees C) and general malaise for 2 weeks. Intraoral examination revealed extremely inflamed and enlarged gingiva with spontaneous bleeding and suppuration.[ncbi.nlm.nih.gov]
  • Rarely, venous malformations can get infected and present with fever or other more severe systemic symptoms. The literature is sparse regarding infection of intramuscular venous malformations.[ncbi.nlm.nih.gov]
Malaise
  • He had persistent fever (39.5 degrees C) and general malaise for 2 weeks. Intraoral examination revealed extremely inflamed and enlarged gingiva with spontaneous bleeding and suppuration.[ncbi.nlm.nih.gov]
  • COMPLICATION : Acute Glomerulonephritis The major clinical and laboratory manifestations of acute post-streptococcal glomerulonephritis are: CLINICAL FEATURES LABORATORY FINDINGS Abrupt onset Hematuria, cylindruria Headache, malaise Proteinuria Edema,[atsu.edu]
Sore Throat
  • […] there's little proof they help) You can buy them from a supermarket or from a pharmacist without a prescription. your sore throat doesn't improve after a week you often get sore throats you're worried about your sore throat you have a sore throat and[nhs.uk]
  • Sore throat was statistically more frequent in FS (18/24 cases, 75%) than in Guillain-Barré syndrome (29/58 cases, 50%). In a series, however, the association of FS with group A streptococcal infection was not shown.[ncbi.nlm.nih.gov]
  • Abstract We described a 21-year-old Japanese patient with sore throat, fever, and diffuse erythema on the neck, trunk, and limbs. Erythema markedly appeared on the neck, axillary, antecubital, and popliteal fossae.[ncbi.nlm.nih.gov]
  • Group A streptococcal (GAS) infections can range from a mild skin infection or a sore throat to severe, life-threatening conditions.[my.clevelandclinic.org]
Petechiae
  • Cutaneous petechiae are not uncommon, and a scarlatiniform rash may be present. When the characteristic rash of scarlet fever exists, a clinical diagnosis can be made with increased confidence.[emedicine.medscape.com]
  • Commonly, the tonsils may have a bumpy look on their surface - somewhat like a golf ball White or yellow colored spots on the tonsils (tonsillar exudate) Petechiae (look like 1-2 mm bright red "dots" which represent ruptured capillaries) scattered on[medicinenet.com]
Angioedema
  • The patient presented with symptoms of angioedema and was treated with corticosteroids. Her condition worsened and plastic surgery was consulted.[ncbi.nlm.nih.gov]
Microscopic Hematuria
  • Post-streptococcal acute glomerulonephritis was diagnosed on the basis of a high antistreptolysin O titer, hypocomplementemia, proteinuria, and microscopic hematuria.[ncbi.nlm.nih.gov]
Headache
  • Abstract We previously found that 97% of children diagnosed with chronic tension-type headaches had meningismus.[ncbi.nlm.nih.gov]
  • In addition to throat pain, the manifestations may include chills, headache, and, in young children, abdominal pain, and vomiting.[symptoma.com]
  • Strep throat starts suddenly with a high fever, headache, swollen red throat and tonsils, swollen lymph nodes in the neck, white or yellow patches at the back of the throat and, in children, abdominal pain.[healthlinkbc.ca]
  • COMPLICATION : Acute Glomerulonephritis The major clinical and laboratory manifestations of acute post-streptococcal glomerulonephritis are: CLINICAL FEATURES LABORATORY FINDINGS Abrupt onset Hematuria, cylindruria Headache, malaise Proteinuria Edema,[atsu.edu]
  • Symptoms include a stuffy nose, colored discharge (green, yellow, or tinged with blood) from the nose, tenderness around the eyes, and headache or a feeling of pressure in the head.[humanillnesses.com]
Neglect
  • Based on the otolaryngologic consultation and the hematologic, immunologic, and microbiologic tests, the final diagnosis was an atypical streptococcal gingivitis with chronic adenoid-related mouth breathing and oral hygiene neglect as contributing factors[ncbi.nlm.nih.gov]

Workup

Early diagnosis of streptococcal infections is important not just for the treatment of the acute disease, but also to prevent complications [6], such as rheumatic fever [7]. Therefore, while culture is regarded as the most reliable method for the identification of Streptococcus species [3], decisions regarding treatment sometimes have to be made before the results are available because of the time required for growth of the bacterial cultures [7].

Several quick assays have been developed based on the immunological detection of the group-specific cell wall carbohydrate of GAS organisms. These assays use latex agglutination, enzyme immunoassay, and optical immunoassay; DNA is detected by PCR methods and chemiluminescent DNA probes [8]. These methods are very specific, but of variable sensitivity, although this has been reported to be high in some assays [6] [7] [8] [9]. Recommendations by the Infectious Diseases Society of America advocate the use of rapid antigen detection tests and/or cultures for the diagnosis of streptococcal pharyngitis, with negative immunological tests to be followed up by culturing the organism in populations at high risk for acute rheumatic fever (children and adolescents) [10].

Assaying for antistreptococcal antibodies in serum is most valuable for the diagnosis of rheumatic fever and other poststreptococcal diseases. In cases of necrotizing fasciitis, a frozen section biopsy can be used to identify or confirm the presence of the organism.

Gram-Positive Bacteria
  • Vancomycin View full drug information Vancomycin acts by inhibiting proper cell wall synthesis in gram-positive bacteria.[emedicine.medscape.com]
  • positive bacteria belonging to the family streptococcaceae.[icd10data.com]
  • However, S. dysgalactiae can also be group A. [1] S. pyogenes is a beta-hemolytic species of Gram positive bacteria that is responsible for a wide range of both invasive and noninvasive infections. [2] Infection of GAS may spread through direct contact[en.wikipedia.org]
  • The genus Streptococcus is comprised of a wide variety of both commensal and pathogenic gram-positive bacteria which are found to exist a wide range of hosts, including humans, horses, pigs and cows.[phagetherapycenter.com]

Treatment

  • However, responses to treatments aimed at GAS eradication such as systemic antibiotics or tonsillectomy are inconsistent.[ncbi.nlm.nih.gov]
  • Even with prompt treatment of invasive group A Streptococcus, it remains the most common cause of infection that results in severe maternal morbidity and death in the world.[ncbi.nlm.nih.gov]
  • TREATMENT: The patient received 80 mg fluoxetine daily. OUTCOME: She responded to treatment with a progressive reduction in symptoms.[ncbi.nlm.nih.gov]
  • He was given one course of intravenous immunoglobulin and became asymptomatic after treatment. He remained symptom free for 8 months following intravenous immunoglobulin treatment.[ncbi.nlm.nih.gov]
  • The purpose of this annotation is to summarise the recent epidemiological trends, describe the presenting features and outline the current investigations and treatment of this rare but life-threatening condition.[ncbi.nlm.nih.gov]

Prognosis

  • The pathogenesis of this invasive infection, as well as predictors of poor prognosis are discussed.[ncbi.nlm.nih.gov]
  • Abstract Pancarditis is a rare condition with a poor prognosis combining endocarditis, myocarditis with abscess formation, and purulent pericarditis.[ncbi.nlm.nih.gov]
  • […] med.hokudai.ac.jp Abstract We conducted a literature review of 55 pregnancies with symptomatic Group A streptococcus (Streptococcus pyogenes) infection reported in English (20 cases), French (2 cases) and Japanese (33 cases) to seek ways of improving prognosis[ncbi.nlm.nih.gov]
  • What Is the Prognosis? When antibiotics are given to treat a GAS infection, your child should recover fully. However, if his throat infection goes untreated, the infection may spread to other parts of the body.[healthychildren.org]
  • Prognosis GAS is responsible for more than 2,000 deaths a year. About 20% of people infected with flesh-eating bacteria die. So do three of every five who develop toxic shock syndrome. Early-onset GBS kills 15% of the infants it affects.[medical-dictionary.thefreedictionary.com]

Etiology

  • Publication types, MeSH terms, Substances Publication types Case Reports Review MeSH terms Biopsy Calcinosis/diagnostic imaging Calcinosis/etiology Child, Preschool Clindamycin/therapeutic use Combined Modality Therapy Diagnosis, Differential Drug Therapy[ncbi.nlm.nih.gov]
  • It may be prudent to consider penicillin prophylaxis in patients with periarteritis nodosa when a streptococcal etiology is documented or highly suspected.[ncbi.nlm.nih.gov]
  • Group G Streptococcus is rarely the infective etiology of perianal streptococcal dermatitis. This condition presents as a superficial well demarcated erythematous patch on clinical examination.[ncbi.nlm.nih.gov]
  • The case represents an unusually clear example in the spectrum of inflammatory neurological disorders associated with streptococcal infection, an etiology that should be considered in the differential diagnosis of all acute onset movement disorders.[ncbi.nlm.nih.gov]
  • Autoimmune etiology for narcolepsy has been suggested. In our patient increased anti-streptolysin O and anti-DNAse B titers were noted.[ncbi.nlm.nih.gov]

Epidemiology

  • Recent epidemiological data from the Health Protection Agency suggest an increasing incidence of iGAS infection in England.[ncbi.nlm.nih.gov]
  • In recent epidemiological studies, Streptococcus dysgalactiae subsp. equisimilis (SDSE) has been isolated from severe invasive streptococcal infection.[ncbi.nlm.nih.gov]
  • OBJECTIVES: To evaluate the epidemiology of perineal streptococcal infection and recurrence rates following amoxicillin treatment.[ncbi.nlm.nih.gov]
  • We review the epidemiology of group A streptococcal infection and suggest a potential role for chemoprophylaxis of household contacts to reduce the burden of disease within the indigenous population of Northern Australia. 2014 The Authors.[ncbi.nlm.nih.gov]
  • Abstract Recent epidemiological reports suggest an increased frequency of invasive streptococcal infections linked to the appearance of a dominant group A Streptococcus serotype.[ncbi.nlm.nih.gov]
Sex distribution
Age distribution

Pathophysiology

  • The pathophysiology of the involuntary movements may be associated with sensorimotor cortex hyperexcitability.[ncbi.nlm.nih.gov]
  • These differences in the pattern and extent of neuroinflammation also signify a possible difference in pathophysiological etiology between PANDAS and Tourette syndrome patients. The Author(s) 2014.[ncbi.nlm.nih.gov]
  • Because the pathophysiology of invasive GAS infection is largely toxin mediated, the use of a protein synthesis inhibitor (eg, clindamycin) offers a theoretical advantage.[emedicine.medscape.com]

Prevention

  • Hand washing remains the cornerstone of prevention as transmission can occur directly from an asymptomatic colonized healthcare provider, other patients, or a community-acquired source.[ncbi.nlm.nih.gov]
  • Thus this report raises the question whether an additional penicillin prophylaxis could be valuable for prevention of streptococcus-associated MDEM relapses.[ncbi.nlm.nih.gov]
  • The early use of penicillin is essential in preventing a cascade of events, resulting in severe fasciitis, destruction of tissues, and subsequent rheumatic fever and rheumatic heart disease.[ncbi.nlm.nih.gov]
  • If you have a streptococcal infection, which of these is a good way to prevent its spread? A. Staying home from school or work B. Washing hands thoroughly C. Taking an antibiotic D. All of the above 5.[urmc.rochester.edu]

References

Article

  1. Hamada S, Kawabata S, Nakagawa I. Molecular and genomic characterization of pathogenic traits of group A Streptococcus pyogenes. Proc Jpn Acad Ser B Phys Biol Sci. 2015;91(10):539-559.
  2. Wessels MR. Streptococcal pharyngitis. N Engl J Med.2011;364(7):648-655.
  3. Cunningham MW. Pathogenesis of group A streptococcal infections. Clin Microbiol Rev. 2000;13(3):470-511.
  4. Pavone P, Parano E, Rizzo R, Trifiletti RR. Autoimmune neuropsychiatric disorders associated with streptococcal infection: Sydenham chorea, PANDAS, and PANDAS variants. J Child Neurol. 2006;21(9):727-736.
  5. O’Loughlin RE, Roberson A, Cieslak PR, et al. The epidemiology of invasive group A streptococcal infection and potential vaccine implications: United States, 2000-2004. Clin Infect Dis. 2007;45(7):853-862
  6. Smith JM, Bauman MC, Fuchs PC. An OIA for the direct detection of group A strep antigen. Lab. Med. 1995;26: 408–410.
  7. Orda U, Gunnarsson R, Orda S, Fitzgerald M, Rofe G, Dargan A. Etiologic predictive value of a rapid immunoassay for the detection of group A Streptococcus antigen from throat swabs in patients presenting with a sore throat. Int J Infect Dis. 2016;45:32-35.
  8. Leung AK, Newman R, Kumar A, Davies HD. Rapid antigen detection testing in diagnosing group A beta-hemolytic streptococcal pharyngitis. Expert Rev Mol Diagn. 2006 Sep;6(5):761-766.
  9. Lasseter GM, McNulty CAM, Hobbs FDR, Mant D, Little P. In vitro evaluation of five rapid antigen detection tests for group A beta-haemolytic streptococcal sore throat infections. Family Practice. 2009; 26: 437–444.
  10. Shulman ST, Bisno AL, Clegg HW, et al. Clinical practice guideline for the diagnosis and management of group a streptococcal pharyngitis: 2012 update by the Infectious Diseases Society of America. Clin Infect Dis. 2012;55(10):e86-e102.

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Last updated: 2018-06-21 23:52