Pper motor neuron signs in combination with other neurologic features; seven had parkinsonism. By 1 month after onset, seven had normal neurologic examinations and were symptomatically well with complete resolution of neurologic signs. By 2 months, an additional 6 had resolution of neurologic signs (Table 3). Four continued to display objective neurologic findings–an 18-year-old male with persistent myoclonus, ataxia, and spasticity; a 14-year-old female with persistent ataxia and parkinsonism; and a 7-year-old male and 16-year-old female both of whom had persistent lower extremity hyperreflexia, clonus, and spastic gait. Thirteen of these patients were re-assessed at approximately 11 months after acute illness; none had experienced a recurrence of neurologic illness, but the two patients with hyperreflexia, clonus, and spasticity at one month continued to demonstrate these signs.Extensive diagnostic testing for other viral, bacterial, parasitic, and rickettsial pathogens, including broad-spectrum polymerase-chain reaction (PCR) testing and random-primer sequencing, was performed on 16 of the 303 patients overall and included four patients with neurologic illness. Viral cultures, serologic assays for infectious agents, and PCR for 
pathogen-specific nucleic acid sequences were negative, and random-primer PCR assays in serum were unremarkable or nonspecific. Pentagastrin chemical information Autopsy specimens from one decedent with focal neurologic findings, including ataxia, spasticity, and clonus, showed ASP015K supplier patchy necrosis in the liver; histopathology of cerebral cortex, cerebellum, pons, and medulla were unremarkable and without perivascular cuffing or other signs of acute inflammation. Immunohistochemical assays for leptospira and flaviviruses in all tissues were negative.Dietary Findings and Laboratory ResultsAlthough chronic malnutrition was present in this poor and rural area, there had been no acute changes in food availability or food type consumption reported by villagers. Cassava consumption was reported in all affected areas, including both bitter and sweet cultivars, but no recent changes in cassava processing were reported. We were unable to elicit a history of pea or legume consumption, or other plants that would be suggestive of Lathyrus sativus. Serum vitamin B12 concentrations were assessed in 13 patients with and 10 patients without neurologic signs. The distribution of the 23 levels (range: 175?540 pg/mL) was mainly within the central 95 percent reference interval generated from a sample of presumably healthy U.S. residents, and the distributions of 1516647 the two groups were not significantly different from each other (Table 2). Only one patient (without neurologic signs) had a serum vitamin B12 concentration ,200 pg/mL, a cutoff value often used to indicate B12 deficiency [21]. Serum PLP and 4-PA concentrations were assessed in eight persons with and nine without neurologic illness. The distribution of these 17 PLP concentrations (range: 0.7?0.4 nmol/L) was lower than the central 95 percent reference interval generated from a U.S. population [22], while the 4PA concentrations (range: 7.4?56 nmo/L) were mainly within this referent range. Fourteen (82 ) of the samples had low PLP values (,20 nmol/L) indicative of B6 deficiency, a higher percentage than 23115181 that seen in the U.S. population (25 of nonsupplement users) [22]. The PLP and 4PA concentrations in theAssessment of Subclinical Neurological Illness Among Unaffected VillagesSixty-five persons from two affecte.Pper motor neuron signs in combination with other neurologic features; seven had parkinsonism. By 1 month after onset, seven had normal neurologic examinations and were symptomatically well with complete resolution of neurologic signs. By 2 months, an additional 6 had resolution of neurologic signs (Table 3). Four continued to display objective neurologic findings–an 18-year-old male with persistent myoclonus, ataxia, and spasticity; a 14-year-old female with persistent ataxia and parkinsonism; and a 7-year-old male and 16-year-old female both of whom had persistent lower extremity hyperreflexia, clonus, and spastic gait. Thirteen of these patients were re-assessed at approximately 11 months after acute illness; none had experienced a recurrence of neurologic illness, but the two patients with hyperreflexia, clonus, and spasticity at one month continued to demonstrate these signs.Extensive diagnostic testing for other viral, bacterial, parasitic, and rickettsial pathogens, including broad-spectrum polymerase-chain reaction (PCR) testing and random-primer sequencing, was performed on 16 of the 303 patients overall and included four patients with neurologic illness. Viral cultures, serologic assays for infectious agents, and PCR for pathogen-specific nucleic acid sequences were negative, and random-primer PCR assays in serum were unremarkable or nonspecific. Autopsy specimens from one decedent 
with focal neurologic findings, including ataxia, spasticity, and clonus, showed patchy necrosis in the liver; histopathology of cerebral cortex, cerebellum, pons, and medulla were unremarkable and without perivascular cuffing or other signs of acute inflammation. Immunohistochemical assays for leptospira and flaviviruses in all tissues were negative.Dietary Findings and Laboratory ResultsAlthough chronic malnutrition was present in this poor and rural area, there had been no acute changes in food availability or food type consumption reported by villagers. Cassava consumption was reported in all affected areas, including both bitter and sweet cultivars, but no recent changes in cassava processing were reported. We were unable to elicit a history of pea or legume consumption, or other plants that would be suggestive of Lathyrus sativus. Serum vitamin B12 concentrations were assessed in 13 patients with and 10 patients without neurologic signs. The distribution of the 23 levels (range: 175?540 pg/mL) was mainly within the central 95 percent reference interval generated from a sample of presumably healthy U.S. residents, and the distributions of 1516647 the two groups were not significantly different from each other (Table 2). Only one patient (without neurologic signs) had a serum vitamin B12 concentration ,200 pg/mL, a cutoff value often used to indicate B12 deficiency [21]. Serum PLP and 4-PA concentrations were assessed in eight persons with and nine without neurologic illness. The distribution of these 17 PLP concentrations (range: 0.7?0.4 nmol/L) was lower than the central 95 percent reference interval generated from a U.S. population [22], while the 4PA concentrations (range: 7.4?56 nmo/L) were mainly within this referent range. Fourteen (82 ) of the samples had low PLP values (,20 nmol/L) indicative of B6 deficiency, a higher percentage than 23115181 that seen in the U.S. population (25 of nonsupplement users) [22]. The PLP and 4PA concentrations in theAssessment of Subclinical Neurological Illness Among Unaffected VillagesSixty-five persons from two affecte.
