Bancroftian filariasis on Pemba Island, Zanzibar, Tanzania: an update on the status in urban and semi-urban communities.

Cross-sectional clinical, parasitological and entomological surveys for bancroftian filariasis were conducted in Konde, Chake Chake and Kengeja, three urban and semiurban communities on Pemba Island, and the results were compared with similar surveys done 15 years earlier. The overall prevalences of clinical manifestations among males aged 15 years or more (n = 614) was remarkably similar to those recorded 15 years earlier: elephantiasis 1.4% in 1975 and 1.1% in 1990; hydrocele, 22.4% and 21.8%, respectively. However, when the communities were compared individually, there was a reduction in the hydrocele prevalence in Konde from 22.4% to 11.5% and an increase in Kengeja from 27.0% to 35.5%. The overall microfilarial prevalence found during night blood surveys of all individuals aged 1 year or more (n = 2687) was 9.7%, compared to 14.2% recorded in 1975. The reduction was most pronounced in Konde. Of 1052 female mosquitoes caught with CDC light traps, 95% were Culex quinquefasciatus and 5% Anopheles gambiae s.l. Infective larvae of Wuchereria bancrofti were found only in the former. The filariasis situation in urban and semiurban communities on Pemba Island appears not to have changed considerably over the last 15 years.

Genetic analysis of kifafa, a complex familial seizure disorder.

Kifafa is the Swahili name for an epileptic seizure disorder, first reported in the early 1960s, that is prevalent in the Wapogoro tribe of the Mahenge region of Tanzania in eastern Africa. A 1990 epidemiological survey of seizure disorders in this region reported a prevalence in the range of 19/1,000-36/1,000, with a mean age at onset of 11.6 years; 80% of those affected had onset prior to 20 years of age. A team of investigators returned to Tanzania in 1992 and collected data on > 1,600 relatives of 26 probands in 20 kifafa families. We have undertaken a genetic analysis of these data in order to detect the presence of familial clustering and whether such aggregation could be attributed to genetic factors. Of the 127 affected individuals in these pedigrees, 23 are first-degree relatives (parent, full sibling, or offspring) of the 26 probands; 20 are second-degree relatives (half-sibling, grandparent, uncle, or aunt). When corrected for age, the risk to first-degree relatives is .15; the risk to second-degree relatives is .063. These risks are significantly higher than would be expected if there were no familial clustering. Segregation analysis, using PAP (rev.4.0), was undertaken to clarify the mode of inheritance. Among the Mendelian single-locus models, an additive model was favored over either a dominant, recessive, or codominant model. The single-locus model could be rejected when compared with the mixed Mendelian model (inclusion of a polygenic background), although the major-gene component tends to be recessive.(ABSTRACT TRUNCATED AT 250 WORDS)

Headache in a nonclinical population in Dar es Salaam, Tanzania. A community-based study.

Headache is a common symptom that constitutes a major health problem to all countries in the world with a variable prevalence from about 20.2% in the African population to about 80% in populations of the civilized world. Community-based studies in African populations are still scanty, and the impact on health facility utilization and sickness absence from work is unknown. After a simple random selection, 1540 urban workers and students of higher education completed a standardized self-administered questionnaire on headache. A total of 815 (52%), (620 (51%) men, 195 (60%) women) admitted to having suffered a headache requiring medication or medical consultation in the last year. Of these, 366 (23.7%) had recurrent headache not attributable to systemic disease. Of the total with recurrent headache, there was a significant preponderance of women over men with sex prevalence of 28.9% and 22.4%, respectively (X2 P = 0.0001). Combined vascular-muscular-type of headache exceeded all types of headache, accounting for 35.8% of cases, followed by migraine accounting for 30.8% of cases. Organic disease was rare, accounting for 8.5% of cases, and psychogenic causes of headache were even rarer at less than 1.2% of cases. Within 2 months of onset of recurrent headaches, over 32% of sufferers had utilized the health facility at their place of work or study. A significant number of cases (175) had an average of 11.3 lost work days per year in comparison to a control group of 154 persons with an average of 5.7 lost work days per year for reasons other than headache (X2 P = 0.0005).(ABSTRACT TRUNCATED AT 250 WORDS)

Knowledge, attitude and practice (KAP) towards epilepsy in secondary school students in Tanzania.

Persons with epilepsy are shunned and discriminated against in education, employment, and marriage in Africa, because epilepsy is seen as a highly contagious and shameful disease in the eyes of the public. These observations come from many studies carried out in Africa including recent ones in Nigeria and Liberia. The KAP towards epilepsy among school children in Tanzania has not been studied and this information is essential before a health education programme on epilepsy can be designed for incorporation into the school curriculum. Therefore a study was carried out on 426 secondary school children in Mahenge to find out their KAP towards epilepsy. Forty six pc (193 of 420, students attributed epilepsy to heredity, brain injury, brain infection and witchcraft in that order. About 60 pc (186 of 331) considered epilepsy to be contagious through physical contact, saliva, and breath. Hospital treatment was considered by 62.7 pc (248 of 395) students and 80 pc (346 of 422) considered epilepsy to be controllable. Over 90 pc (385 of 414) of the students believed an epileptic person to be mentally subnormal and considered this a major reason for not sending an epileptic child to school. Their belief in the contagiousness of epilepsy was a major reason for discriminating against an epileptic child or person playing with other children; going to school; sharing the same plate or bed and as a marriage partner and this was significantly more so in the lower than upper classes.(ABSTRACT TRUNCATED AT 250 WORDS)

Chronic cyanide poisoning in relation to blindness and tropical neuropathy.

Within a group of 20 patients showing optic atrophy and macula degeneration, 14 patients could be examined for neurological and audiometric defects. In 6 patients neurological signs and symptoms were observed. Nine patients reported loss of hearing and in 3 of them a severe perceptive deafness was seen in the audiogram. In 3 of the 14 patients a combination of severe neurologic and audiologic symptoms developed and in two of them a high thiocyanate concentration in serum was observed. The occurrence of perceptive deafness and posterior column sensory loss in the lower extremities in four of the patients made the diagnosis of polyneuropathy the most plausible. Although a similarity to chronic myelopathies caused by nutritional cyanide poisoning cannot be denied, the mean thiocyanate concentration in plasma 24 mumol/L (1.39 mg/L), and the cyanide levels in the blood 0.09 mumol/L (2.3 micrograms/L) were substantially lower than those found in other individuals during periods of extreme drought in which food only consisted of the bitter variety of cassava. The role of cyanide in the etiopathology of this polyneuropathy is unknown.

Knowledge, attitude, and practice toward epilepsy among rural Tanzanian residents.

Before a health education program can be established, one must first know what the target population believes and does with respect to the disease in question. Therefore, we performed a study among Tanzanian rural inhabitants to identify their knowledge, attitude, and practice (KAP) toward epilepsy: 3,256 heads of households (mean age 40.2 years, range 15-90 years; M/F ratio 1:1) were interviewed. Of the respondents, 32.9% said they had never seen a seizure; 67.7% said they did not know the cause of epilepsy; 33.3% mentioned various causes including heredity, witchcraft, infection of the spinal cord, hernia; 40.6% believed epilepsy was infectious through physical contact, flatus, breath, excretions, sharing food; 36.8% believed epilepsy could not be cured and 17.1% believed it could not even be controlled; 45.3% believed epilepsy could be treated by traditional healers, and only 50.8% believed hospital drugs were of any use; and 62.7% of the respondents would not allow an epileptic child to go to school for various reasons, including mental subnormality (54.0%), fear of the child falling while alone (65.9%), and fear that the epileptic child would infect other children (11.2%). Concerning what is to be done when a seizure occurs, 33.5% of the respondents would keep away and not touch the person; 16.5% would take some potentially harmful measure such as forcing a mouth gag or forcing a drink such as water (1 even mentioned urine); 5.2% would take unnecessary measures such as rushing the patient to a hospital. Only 35.7% of respondents would perform at least some of the currently recommended first-aid measures.(ABSTRACT TRUNCATED AT 250 WORDS)

Konzo: a distinct disease entity with selective upper motor neuron damage.

Two Tanzanian patients with konzo were severely disabled by a non-progressive spastic paraparesis, since the sudden onset during an epidemic six years earlier. At the time of onset they had a high dietary intake of cyanide from exclusive consumption of insufficiently processed bitter cassava roots. MRI of brain and spinal cord were normal but motor evoked potentials on magnetic brain stimulation were absent, even in the only slightly affected upper limbs. Other neurophysiological investigations were largely normal but the more affected patient had central visual field defects. Konzo is a distinct disease entity with selective type upper motor neuron damage.

The significance of seizure provoking factors in epileptic patients

207 patients were randomly selected out of 590 epileptic patients attending the neurology clinic of the St. Rhadboud Hospital; Nijmegen between January 1st 1980 and June 30th 1985; and studied for the presence of factors known to provoke or precipitate seizures in patients with epilepsy. Seizure precipitating factors were in 64.7 percent of the patients. The factors included; emotional or psychological stress (54.1 percent); menstruation (25.0 percent of the females); physical stress or lack of sleep (19.3 percent); alcohol (17.8 percent); light or TV watching (1.9 percent); specific sounds or Music (1.9 percent); excessive relaxation (1.9 percent); hyperventilation (1.9 percent) and others (7.2 percent). Seizures occured in the wakeful state in 56.2 percent of the patients; during sleep in 32.2 percent. Seizure precipitant are significantly present in epileptic patients and should be routinely looked for in every patient with epilepsy

Prevalence and incidence of epilepsy in Ulanga, a rural Tanzanian district: a community-based study.

A random cluster sample survey of approximately 18,000 people in 11 villages was performed in Ulanga, a Tanzanian district with a population of approximately 139,000 people. Well-instructed fourth-year medical students and neurologic and psychiatry nurses identified persons with epilepsy using a screening questionnaire and sent them to a neurologist for detailed evaluation. Identified were 207 subjects (88 male, 119 female) with epilepsy; of these, 185 (89.4%) (80 male, 105 female) had active epilepsy. The prevalence of active epilepsy was 10.2 in 1,000. Prevalence among villages varied, ranging from 5.1 to 37.1 in 1,000 (age-adjusted 5.8-37.0). In a 10-year period (1979-1988) 122 subjects living in the 11 villages developed epilepsy, with an annual incidence of 73.3 in 100,000. Generalized tonic-clonic seizures (GTCS) accounted for 58% and partial seizures accounted for 31.9%, whereas in 10.1% seizures were unclassifiable. Of the partial seizures, secondarily generalized seizures were the most common. Possible etiologic or associated factors were identifiable in only 25.3% of cases. Febrile convulsions were associated in 13.4 of cases. Other associated factors included unspecified encephalitis (4.7%), cerebral malaria (1.9%), birth injury (1.4%), and other (3%). In 38% of the cases, there was a positive family history of epilepsy.

Prognosis of epilepsy in a rural African community: a 30-year follow-up of 164 patients in an outpatient clinic in rural Tanzania.

While working as a physician in Tanzania in the early 1960s, Dr. Louise Jilek-Aall founded an outpatient clinic for epilepsy among the Pogoro people of Mahenge mountains where epilepsy (locally termed Kifafa) had brought misery and death to an unusually high percentage of the population. With local assistance and overseas donations of phenobarbital (PB), this clinic treated approximately 200 patients for less than or equal to 10 years. The area was revisited 30 years later to trace these patients. Of the 164 patients who had started treatment, 86 (52.4%) achieved complete seizure suppression, 59 (36.0%) experienced reduction in seizure frequency, 13 (7.9%) experienced no change, and in 1 (0.6%) seizures were worse. The effect of treatment could not be assessed in 5 (3.0%) patients. After 30 years, only 36 (21.9%) of the 164 patients were known to be alive. Of the patients, 110 (67.1%) had died, and the whereabouts of 18 (11%) could not be traced. The causes of death were epilepsy related (status epilepticus, drowning, burns, dying in or after a seizure) in greater than 50% of the patients. Epilepsy-related deaths were proportionately higher after drug supply was stopped and among patients who were receiving drugs irregularly or who had only partial seizure control. Patients with epilepsy showed an increased mortality rate, which was twice that of the general rural Tanzanian population of similar age. Management of epilepsy in rural Africans should also emphasize methods to prevent epilepsy-related causes of death among patients with epilepsy.

Raised intracranial pressure of obscure cause: prospective clinical review on African Tanzanian patients.

This paper reports a clinical review of 13 patients with raised intracranial pressure of obscure cause seen over a six-year period. Patients were young in the 8 to 40 years age range. Female patients accounted for 54 pc. About half of the females had menstrual abnormalities. 15 pc were obese while the rest were normal or underweight. A previous long history of headache was present in patients with focal neurological signs. The main presenting symptoms were headache and reduction in visual acuity. Main signs were papilloedema and reduced visual Acuity. After a short term follow-up period of one to six years, (mean three years), the general outcome was good with recurrence in one patient. Headache and visual symptoms recovered early after treatment. Focal long tract signs recovered rather slowly. Twelve patients are at present free of symptoms. One died from mesenteric vessel thrombosis and was presumed to have pregnancy related sagittal sinus thrombophlebitis.

Jimson weed food poisoning. An epidemic at Usangi rural government hospital.

Ten agitated and psychotic patients were admitted to Usangi hospital after having eaten stiff-porridge (Ugali) made from millet (Serena). This had been bought from the local regional branch of the National Milling Corporation (NMC). The patients had cardinal signs of atropine poisoning, viz., psychosis with hallucinations, tachycardia, fixed dilated pupils and a dry mouth. Toxicological analysis of the food samples revealed contamination with Jimson weed (Datura stramonium) seeds which contained an atropine-like alkaloid. On studying the records of the chief government chemist, it was found that a similar type of food poisoning had occurred in at least eight other regions. The clinical picture and management of this entirely preventable type of agricultural food poisoning are discussed.

Side-effects of drugs in epileptic patients.

Drug therapy in patients suffering from various forms of epilepsy aims at the administration of such dosages of antiepileptic drugs as to produce significant reduction of seizures without the occurrence of serious side-effects. To assess these side-effects 75 patients (48 males, 27 females) with epilepsy, attending an out-patient clinic were studied prospectively and data were collected regarding diagnosis, drug use and side-effects. Primarily generalized epilepsy and partial complex epilepsy with secondary generalization are the most prevailing categories. 69% (52) Of the patients are treated with monotherapy, with carbamazepine as the drug most frequently prescribed (30/52). Side-effects were scored after examining and questioning the patient with the help of a standard questionnaire. A distinction was made between groups of side-effects, being systemic, anamnestic, dermatological, neurological or miscellaneous. Also, haematological and biochemical changes were looked for. In the monotherapy group 26/52 (50%) of the patients showed side-effects (23 patients with 1, 2 with 2, 1 with 3 side-effects), and in the polytherapy group 15/23 (65%) (8 patients with 1, 7 with 2 side-effects). Adverse drug reactions were hardly related to the plasma concentration category. Between 50-60% of the patients at sub-therapeutic and low-therapeutic plasma levels complained of side-effects. No clear relationship between the clinical efficacy and the side-effects could be established. The clinical custom, among others, to titrate the dose according to the disappearance or appearance of side-effects seems open for discussion.

Retrospective analysis of drug treatment in epileptic patients.

An epidemiological analysis was performed of the adult, out-patient epilepsy clinic population of a university hospital during the period from 1 January 1981 through 30 June 1985. The number of patients that could be traced amounted to 590. An at random sample of 207 were retrospectively analysed. Gender distribution was male:female = 1.46. The mean age was 37.4 years. The diagnoses were classified according to the classification of the International League Against Epilepsy (ILAE). A preponderance of partial seizures was present, reflecting the selection in a university out-patient clinic of more difficult to treat forms of epilepsy. Antiepileptic drugs used in the treatment varied; monotherapy was obtained in 46% of the cases and carbamazepine was the most frequently prescribed drug (49%). Changes in seizure severity and factors associated with epilepsy are described. A discrepancy was found between the suspected drug levels, based upon the physician's judgement, and the plasma level measured in those patients in whom drug levels were monitored; factors interfering with clinical judgement are discussed.

Bilateral direct carotid-cavernous fistulas of traumatic and spontaneous origin: two case reports.

In the present paper we discuss two cases with bilaterally located carotid-cavernous fistulas: one of traumatic origin and the other occurring spontaneously. Most traumatic fistulas are direct, unilateral and of a high flow type. In our first case we deal with traumatic bilateral direct fistulas with a low flow, a combination which must be considered rare and is not reported in the literature so far. In our second case there are bilaterally located fistulas, occurring spontaneously. Peculiarly they are direct, instead of indirect as is to be expected in spontaneously developing fistulas, and of a low flow type. This combination too must be considered extremely rare. In both cases conservative therapy was successful, despite their difference in etiology. It appears that neither the anatomy nor the manner of onset determines the success of conservative therapy, but the fact that a fistula is of a high- or low flow type.