Days Of Acyclovir Research Articles

690. Oka-Strain Varicella-Zoster Virus Meningitis in a Healthy Adolescent

BackgroundRoutine vaccination with varicella-zoster (VZV) vaccine has resulted in significant declines in the incidence of VZV cases, hospitalizations, and deaths across pediatric age. This vaccine is safe and effective and adverse events are monitored closely.MethodsWe describe a case of vOka meningoencephalitis in a twelve-year-old vaccinated boy who presented with altered mental status and a vesicular facial rash.ResultsA twelve-year-old healthy, fully-vaccinated boy presented to urgent care clnic with left-sided frontotemporal headache, left-sided eye pain, and photosensitivity. Over several days, a left-sided facial rash progressed to include papular and vesicular lesions over the cheek, as well as over the left side of the chin and at the midline of the lower lip. He was somnolent, sleeping 18- 20 hours a day. The child was evaluated by a pediatric neurologist who noted a left-sided ptosis and left lateral rectus palsy; he was admitted for further workup. Cerebrospinal fluid (CSF) analysis showed WBC of 33 cells/ml3 with 92% lymphocytes; glucose of 44mg/dL (serum glucose 84mg/dL), and protein of 50mg/dL (range: 15-45). Nasopharyngeal multiplex polymerase chain reaction (PCR) (BioFire Diagnostics, Salt Lake City, Utah) was positive for rhinovirus/enterovirus. Testing of facial vesicles for varicella-zoster virus (VZV) and herpes simplex virus (HSV) was negative by DFA and culture, and enteroviral throat and rectal PCRs were negative. However, CSF PCR for VZV was found to be positive. In light of this finding, the viral isolate was sent to Dr. Anne Gershon’s research lab at Columbia University Medical Center for typing and was determined to be vOka. Quantitative and functional immune studies were performed, and were normal. The patient initially received 7 days of intravenous acyclovir, during which time his rash resolved and mental status returned to baseline. He completed a total of 14 days of acyclovir and has had no recurrences.ConclusionThis case represents only the tenth case of Oka-strain meningitis in an immunocompetent child reported to date, and one of very few cases in immunocompetent adolescents. While rare, vOka meningitis is an entity of which primary care pediatricians and infectious diseases specialists should be aware, even in older children.Disclosures All Authors: No reported disclosures

Safety of High-dose Acyclovir in Infants With Suspected and Confirmed Neonatal Herpes Simplex Virus Infections.

Acyclovir is used to treat herpes simplex virus disease in infants. Treatment with high-dose acyclovir, 60 mg/kg/d, is recommended; however, the safety of this dosage has not been assessed in the past 15 years, and this dosage is not currently approved for infants by the US Food and Drug Administration. We included infants with neonatal herpes simplex virus disease treated with ≥14 days of intravenous acyclovir starting in the first 120 days of life admitted to 1 of 42 neonatal intensive care units managed by the Pediatrix Medical Group between 2002 and 2012. We determined the frequency and proportion of infants with clinical and laboratory adverse events (AEs) as well as the number and proportion of infant days with laboratory AEs occurring during acyclovir exposure. We identified 89 infants during the study period with 1658 days of acyclovir exposure. Almost all received high-dose acyclovir therapy (79/89, 89%). The most common clinical AEs were hypotension and seizure, both occurring in 9% of infants. Thrombocytopenia was the most common laboratory AE occurring in 25% of infants and on 9% of infant-days. Elevated creatinine occurred in 2% of infants and 0.2% of infant-days and no infants developed renal failure requiring dialysis. Overall, 45% of infants had ≥1 AE. In this cohort of infants treated during the high-dose acyclovir era, AEs were common but usually not severe. Many of the AEs reported in this cohort may be related to the underlying infection rather than due to acyclovir exposure.

Varicella-zoster meningoencephalitis — Case report

Introduction: Encephalitis is defined as inflammation of the brain parenchyma and meningoencephalitis when there is meningeal involvement. A viral etiology is the most common and the diagnostic method of choice is the polymerase chain reaction (PCR) of viral nucleic acids in cerebrospinal fluid (CSF). Herpes simplex virus is the leading cause of encephalitis and varicella-zoster virus (VZV) a less common cause, particularly in immunocompetent individuals. Case report: Woman, 67 years old, retired nurse, brought to the emergency room by disorientation. Physical examination: slowed, disoriented, incoherent and repetitive speech; subfebrile (T-37, 2 °C); no meningeal signs or skin lesions were identified. Laboratory tests revealed leukocytosis (10.5 × 10 ^9/L) with neutrophilia (86.9%). Computed tomography and magnetic resonance imaging (MRI) of the brain were performed and there were no lesions on brain parenchyma. Lumbar puncture (LP): 5 leukocytes/mm3; erythrocytes 2327/mm3; glucose: 80 mg/dl, and protein 26.7 mg/dl. Blood, cerebrospinal fluid cultures and capsular antigens were collected. The patient had clinical worsening at 48 h with fever (T-38, 7 °C), agitation, seizures, left hemiparesis and meningeal signs. LP was repeated: leukocytes 40/mm (98% of polymorphonuclear cells), glucose: 113 mg/dl, and protein: 30.4 mg/dl. CSF cultures were repeated and viral PCR in cerebrospinal fluid was requested. Human immunodeficiency virus testing was negative. Empirically ceftriaxone, ampicillin and acyclovir 10 mg/Kg ev, 8/8 h was established. Electroencephalography revealed severe cortical structural damage in the left hemisphere. MRI of the brain was repeated and showed no lesions. Microbiological study was negative and VZV PCR in CSF was positive. She completed 21 days of acyclovir. The patient had a good clinical and neurologic outcome with resolution of all the symptoms. Conclusion: VZV meningoencephalitis. The case stands out for infection of the central nervous system by VZV in an immunocompetent patient, along with the importance of a high clinical suspicion of viral encephalitis even in the presence of pleocytosis with a predominance of polymorphonuclear cells in the early phase of infection. The suspicion of encephalitis is critical in the decision of early antiviral therapy to prevent neurological sequelae.

Herpes simplex encephalitis following spinal ependymoma resection: case report and literature review

Herpes simplex encephalitis (HSE) is a rare complication of neurosurgical procedures but must be considered in early deterioration of the postoperative patient. This is the first report of HSE following spinal cord tumor resection. A 65-year-old woman had C2-C5 laminectomy for subtotal resection of intramedullary ependymoma. Six days postoperatively she developed fever, vomiting and rapid decline in mental status. Brain MRI revealed enhancement of left insular cortex. Polymerase chain reaction on cerebrospinal fluid (CSF) identified herpes simplex virus type 1 (HSV-1) as the causal agent. Twenty-one days of acyclovir led to improvement. Three subsequent admissions to neurological intensive care unit were required for deterioration in mental status, including pneumonia, hydrocephalus and deep vein thromboses. Ventriculoperitoneal shunt (VPS), tracheotomy, percutaneous intravenous central catheter (PICC) line and percutaneous endoscopic gastrostomy (PEG) were placed. She was discharged to skilled nursing home care. Acyclovir is effective therapy against HSV, though outcomes may be poor even in optimally treated cases. Empiric treatment must be started even in the absence of serologic evidence of HSV infection if suspicion for HSE is high.

Gastric Lymphoma: The Vanishing Act

Purpose: Spontaneous regression (SR) is a well-known phenomenon of various cancers, especially low-grade malignancies, and is referred to the disappearance of cancer cells without specific anti-cancer therapy. Diffuse large B cell lymphoma (DLBL) is an aggressive malignant neoplasm that can be fatal if left untreated. We report a case of SR of a gastric DLBL which is considered to be an extremely rare occurrence. Case Presentation: A 40 year-old man, with a history of HIV, EBV, and CMV infections presented with abdominal pain, nausea and vomiting. Endoscopic examination (EGD) revealed a deep ulcer in the anterior wall near the antrum of the stomach, and an adjacent 5-mm satellite nodule. The patient's ulcer had perforated through the bowel wall and adhesions with the liver capsule were noted. Biopsy of the gastric ulcer and nodule showed diffuse infiltrate of immature large lymphocytes, positive for CD20, BCL6 and lambda light chains, and negative for CD3 and kappa that were diagnostic for DLBL. Bone marrow biopsy was negative and a nuclear scan showed uptake only at the gastric ulcer region. One month after the EGD biopsy, a subtotal gastrectomy was performed and the entire gastrectomy specimen and all possible lymph nodes were submitted for histopathological analysis. Immunohistochemistry stains for Helicobacter pylori/EBV/CMV antigens were all negative in both biopsy and gastrectomy specimens. Intriguingly, no residual lymphoma was identified anywhere in the gastrectomy specimens. PCR DNA profiling confirmed that the EGD biopsy and the gastrectomy specimens were from the same patient. During the 1 month period between the biopsy and gastrectomy, the patient had only received daily Omeprazole, 11 days of antidepressive drugs, and 3 days of Acyclovir for a herpes skin infection. Discussion:SR of gastric DLBL is considered to be extremely rare and prior such reported cases involved use of either eradication therapy for H. pylori or histamine-2 receptor antagonists. None of these were used in our patient. Various humoral and immune-regulatory mechanisms, including the induction of an immune response secondary to trauma resulting from biopsies have been proposed to explain the concept of SR of cancers, but the topic is widely speculative even today. Conclusion: Further elucidation of the process of SR might offer the possibility of finding a cure even for aggressive cancers with currently fatal outcomes.

Effect of acyclovir on herpetic ocular recurrence using a structural nested model

Noncompliance with assigned therapies is ubiquitous in randomized clinical trials. Treatment effects may be corrected for noncompliance using Robins' structural nested models, but few examples have been published. The Herpetic Eye Disease Study randomized 703 ocular herpes patients to 365 days of acyclovir or placebo between 1992 and 1996, and achieved over 90% compliance in both arms. The hazard of recurrence in the acyclovir arm was 0.55 times the hazard in the placebo arm using an intent-to-treat approach (95% confidence interval [CI]: 0.41, 0.75). Assuming a structural nested model with a Weibull distribution, the hazard of recurrence under constant exposure to acyclovir was 0.41 times that of the non-exposed (test-based 95% CI: 0.28, 0.72), or 34% larger than the intent-to-treat estimate. Notwithstanding excellent compliance, intent-to-treat estimates may notably undervalue the causal effect of a treatment.