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Query: UMLS:C0027121 (myositis)
 4,538 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Nervous tissue lesions were retrospectively studied for detection of productive varicella zoster virus (VZV) infection in 33 autopsied cases, including 19 herpes zoster (HZ) (10 trigeminal, nine spinal) and 14 cases of nodular brainstem encephalitis without HZ. Immunocytochemistry for VZV antigens and in situ hybridization with a biotinylated VZV DNA probe were used on formol-fixed paraffin sections. Peripheral and central nervous system, skin and striated muscle were investigated in serial sections; available tissue blocks, however, varied between cases. Varicella zoster virus production (both antigen and DNA) in nervous tissue was found in HZ cases but only of short survival after a rash of up to 7 wks (eight out of 12 patients). Varicella zoster virus was visualized in nerve cells, glial cells, Schwann cells and blood vessels. In the central nervous system (CNS), VZV was detected in trigeminal nuclei (one out of 10 brains) or disseminated nodular brainstem lesions (one out of 10 brains), in subependymal microvessels (one out of 10 brains) or vasculitic arteries (two out of 19 brains or spinal cords). In the peripheral nervous system (PNS), VZV (DNA and antigen) was found in neurons and satellite cells of sensory ganglia (four out of seven cases with sampling of ganglia), and in damaged nerve fibres including a muscle nerve in one case; myositis with VZV in affected muscle fibres was found in the latter case. In nodular brainstem encephalitis, one case contained VZV within nodular lesions. We conclude that (i) VZV neural spread is suggested by detectable virus in ganglia, nerve fibres and CNS target nuclei; (ii) haematogenous spread of VZV is suggested by detection of virus in CNS microvessels and in disseminated brainstem encephalitis; (iii) VZV myositis may occur in zosteric myotomes; and (iv) VZV is a possible agent in nodular brainstem encephalitis.
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PMID:Presence, distribution and spread of productive varicella zoster virus infection in nervous tissues. 131 68

We report about four children, who suffered from myositis caused by beta-hemolytic group A streptococci (GAS). The cases were observed during the last 12 months, and differed much in severity. Soft tissue infections caused by GAS are reported with increasing frequency from the USA, Australia and Europe. They occur in hitherto healthy children and young adults, mostly without a predisposing trauma. In children, a preceding varicella infection is often found. Some patients develop a streptococcal toxic shock syndrome with a letality of 20-50%. The bacteria, which can be isolated from normally sterile body sites, are morphologically inconspicuous, and are mostly of the serological type M1 or M3.
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PMID:[Streptococcal myositis in children: four case histories]. 798 16

In clinical practice herpes zoster infections are common. The cause is the reactivation of the herpes varicella virus that persists in the sensory ganglia after an earlier primary infection with shingles. There are several neurological complications such as meningitis, ventriculitis, encephalitis, myelitis, cerebral angiitis, myositis, paresis of motor nerves, acute polyneuritis, and most commonly post-zoster neuralgia. A proposed reason for these complications is the direct infiltration of the virus or a hematogenous infection. Some of the complications can be treated symptomatically such as post-zoster neuralgia and the occurrence of certain complications that can be prevented by the right choice of acute therapy.
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PMID:[Herpes zoster: follow-up, complications and therapy]. 880 7

The severity of streptococcal infections depends upon different virulence of individual strains of its causative agent. The most important species are beta-haemolytic group A streptococci (GAS). Clinical manifestations include skin affections, respiratory tract infections and, in particular, serious systemic invasive infections. The pathogenicity of GAS is derived from cell wall components and extracellular products, especially toxins with properties of the so-called superantigens. Less invasive forms of the disease are include necrotizing fasciitis, myositis, pneumonia, sepsis without focus, arthritis, meningitis, puerperal sepsis, streptococcal toxic shock syndrome (STSS) and severe course of erysipelas and cellulitis with blood culture positive for GAS. In most cases, soft tissue infections dominate, often accompanied by chronic diseases of lower extremities in elderly patients. The other clinical forms are rather rare. In children, the condition is clearly frequently related to chickenpox. The generally accepted therapeutic management comprises comprehensive intensive care, early administration of penicillin in combination with clindamycin, and surgical intervention. The use of intravenous immunoglobulins (IVIG), elimination methods and hyperbaric oxygen are under discussion. The slight increase in cases and ineffective prevention require rapid assessment of diagnosis and adequate treatment as a protracted course of the condition is connected with a high mortality rate.
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PMID:[Invasive streptococcal infections]. 1832 May

In France and Europe, soft tissue infections are secondary to chickenpox infection. In tropical countries, soft tissue infections seem to be different and are more frequent. We conducted a prospective and descriptive study in children hospitalised for cellulitis. We studied characteristics of our population and we tried to individualize risk factors for deep soft tissue infections. 54 children were included over a six-month period. Blood cultures were positive in 10% and local culture in 62%. Pathogenic organisms to be found, were first Staphylococcus aureus (78%) and secondly alpha-haemolytic streptococcus. Average rate hospitalisation was 4.5 days (1-28). Despite intravenous antibiotherapy, more than one third of patients had had a deep soft tissue infection (myositis, abscess, or arthritis). As regards the overall population, deep soft tissue infections associated with cellulitis were more frequent in children over six. Association with arthritis was found only in children under two. Severe malnutrition seems to be a notable risk factor for myositis. Soft tissue infections are still frequent in tropical countries. Deep soft tissue infections are encountered in more than one third of the cases, specially in children over six, and with Staphylococcus aureus. These results justify a systematic hospitalisation. If severe malnutrition is present, association with myositis should be suspected.
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PMID:[Children's soft tissue infections in tropical countries. Prospective study in Mayotte]. 1973 11

Herpes zoster and chickenpox are caused by a single virus, varicella-zoster virus. Herpes zoster ophthalmicus-associated ophthalmoplegia is well documented. Very rarely, herpes zoster and chickenpox cause external ophthalmoplegia. A 48-year-old man was diagnosed with chickenpox and treated with intravenous acyclovir. He suddenly reported diplopia and restricted left eye movement. MRI of the orbit revealed thickening and abnormal contrast enhancement of the preseptal space and lateral rectus muscle of the left eye. In this case, external ophthalmoplegia occurred following chickenpox with radiological evidence of orbital myositis. To the best of our knowledge, this is the first case report of external ophthalmoplegia of radiologically confirmed orbital myositis after chickenpox infection.
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PMID:External ophthalmoplegia with orbital myositis in an adult patient after chickenpox infection. 2483 2

The authors describe 2 patients who presented with orbital findings and later developed vesicular lesions that were positive for varicella zoster virus and consistent with Herpes Zoster ophthalmicus. One case is the first to involve dacryoadenitis and orbital myositis preceding disseminated Herpes Zoster. In the other case, a patient developed zoster orbital syndrome leading to elevated intraocular pressure, loss of vision, and afferent pupillary defect. Canthotomy and cantholysis were required to restore vision. In both cases, the orbital syndrome developed prior to the vesicular rash. These cases highlight the need to consider Herpes Zoster ophthalmicus in patients with orbital syndrome not responding to conventional treatment.
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PMID:Herpes Zoster Ophthalmicus With Orbital Findings Preceding Skin Rash. 2963 8