Geographically Targeted Interventions versus Mass Drug Administration to Control Taenia solium Cysticercosis, Peru.

Optimal control strategies for Taenia solium taeniasis and cysticercosis have not been determined. We conducted a 2-year cluster randomized trial in Peru by assigning 23 villages to 1 of 3 geographically targeted intervention approaches. For ring screening (RS), participants living near pigs with cysticercosis were screened for taeniasis; identified cases were treated with niclosamide. In ring treatment (RT), participants living near pigs with cysticercosis received presumptive treatment with niclosamide. In mass treatment (MT), participants received niclosamide treatment every 6 months regardless of location. In each approach, half the villages received targeted or mass oxfendazole for pigs (6 total study arms). We noted significant reductions in seroincidence among pigs in all approaches (67.1% decrease in RS, 69.3% in RT, 64.7% in MT; p<0.001), despite a smaller proportion of population treated by targeted approaches (RS 1.4%, RT 19.3%, MT 88.5%). Our findings suggest multiple approaches can achieve rapid control of T. solium transmission.

Neurocysticercosis in Northern Peru: Qualitative Insights from men and women about living with seizures.

BACKGROUND: Neurocysticercosis (NCC) is a helminthic disease of the central nervous system, and it is one of the leading causes of seizures and symptomatic epilepsy in countries with tropical regions like Peru. Studies of people with epilepsy in Peru's northern coast have consistently found that between 30% and 50% of epilepsy cases is associated with NCC. There are few studies that report on the differences in incidence and prevalence of NCC by sex, and to our knowledge, none that consider the gendered dimensions of having epilepsy. METHODOLOGY: This qualitative study based on individual interviews (n = 9) and focus group discussions (n = 12) explored the challenges of diagnosis and the implications for everyday activities among men and women with epilepsy as well as the views of their family members on the impact of such condition. PRINCIPAL FINDINGS: The explanatory models used by women to discuss their condition reflect low levels of decision-making power in areas such a reproductive health, health care access and treatment. For some women domestic violence is also a probable cause for seizures among women. The implications of living with neurocysticercosis and the accompanying seizures were reported differently by men and women. While women were mostly concerned about their capacity to perform their domestic responsibilities and their roles as mothers and caregivers; men were mostly concerned about the impact on their income generation activities. Women and men shared concern about the consequences of their condition on the wellbeing of their families. CONCLUSIONS/SIGNIFICANCE: NCC is a disrupting experience for men and women in ways that reflect their position and roles in society: Women as caregivers within the home, men as income generators outside the home. Further gender research is needed to better understand and address the differential impacts of NCC and health system responses as well as gendered dimensions of prevalence and incidence. (268 words).

Population Screening for Urine Antigens to Detect Asymptomatic Subarachnoid Neurocysticercosis: A Pilot Study in Northern Peru.

Subarachnoid neurocysticercosis (SANCC) is a severe and progressive brain infection with Taenia solium. We performed a pilot study of noninvasive screening for SANCC in two endemic villages in northern Peru using a urine antigen screen followed by brain magnetic resonance imaging for participants with elevated levels of antigen. Among the 978 participants screened, we identified eight individuals with SANCC, many of whom were asymptomatic. This represents a minimum prevalence of 0.8% of SANCC, a level higher than expected based on prior studies, and a positive predictive value of 62% for our novel urine screening test. Future studies should confirm whether early detection and management improve clinical outcomes.

Evaluating Urban Taeniasis as a Threat to Cysticercosis Elimination in Northern Peru.

Reintroduction of Taenia solium into a region in Peru where it had been eliminated prompted evaluation of the possibility of reintroduction from an urban reservoir of taeniasis. In a cross-sectional study of an adjacent urban area, we found low prevalence of taeniasis (4/1,621; 0.25%), suggesting minimal risk of parasite reintroduction into rural areas through this route.

Interventional programs to improve therapeutic management of people with epilepsy in low- and middle-income countries.

OBJECTIVE: To assess the current status of initiatives carried out in developing countries to improve therapeutic management of people with epilepsy. METHODS: A literature review was performed in 2015 to identify and analyze interventional programs carried out in countries with low- and middle-income economies. Electronic databases were reviewed with no time restriction. Each intervention was categorized according to the level of evidence achieved (A: blind randomized controlled trial, B: randomized controlled trial, C1: randomized trial, C2: controlled trial, D: prospective cohort, E: retrospective evaluation). RESULTS: A total of 46 intervention projects were identified, 13 with no quantitative assessment. The 31 remaining projects were carried out in 18 countries, 52% (16) in Africa, 42% (13) in Asia, and 6% (2) in Latin America. Among those, 13% (4) were level B, 3% (1) C1, 6% (2) C2, 74% (23) D, and 3% (1) were level E. The effectiveness of the intervention, assessed by the efficacy of antiepileptic drugs, was the primary objective in 81% (25). People with epilepsy were on average seizure-free in 44.6%±14.4% of cases at one year, ranging from 25.0% to 78.4%. At two years, on average 50.9%±29.7% are seizure-free, ranging from 4.6 to 92.7%. The median compliance was 79.3% with a minimum of 21.6% and a maximum of 100.0%. DISCUSSION: No blind randomized controlled trial has been used to assess the efficacy of a program to improve access to antiepileptic drugs (AEDs) in developing countries, and the level of evidence was globally low. Phenobarbital remains the AED predominantly used in programs. Adherence to treatment management has been pointed out to be a key element in the success of a program, sometimes not sufficiently considered. Monthly supply of AEDs, at specific and community level, reducing the costs and time spent traveling, appeared to be the most effective strategies. Homogenization and standardization of evaluation practices of programs to improve the management of epilepsy in resource-limited settings would lead to comparison and meta-analysis which would ultimately improve strategies of support for not only epilepsy but also other noncommunicable diseases in developing countries.

Herbal medicine uses to treat people with epilepsy: A survey in rural communities of northern Peru.

ETHNOPHARMACOLOGICAL RELEVANCE: Epilepsy affects 150,000 people in Peru, with a prevalence of 16.6/1000 and a treatment gap of 75%. Herbal medicine (HM) is widely used in this country. AIM OF THE STUDY: We aimed to assess the use of plants in a rural community in northern Peru as part of therapeutic strategies for people with epilepsy (PWE). MATERIALS AND METHODS: The study was a cross-sectional observational and descriptive study. The inclusion criteria for people with epilepsy were 2 years of age and over, having lived in the study area for at least 3 months and a confirmed diagnosis of epilepsy by a neurologist. The information was gathered through structured interviews using a survey questionnaire. Botanical species used by people with epilepsy or traditional healers were collected and identified. RESULTS: Out of the 228 people with epilepsy included, 60.0% had used herbal remedies and 54.8% both herbal medicine and anti-epileptic drugs. The traditional healer was the first practitioner consulted by 45.2% of people with epilepsy. Sixty-six species have been mentioned by the people with epilepsy and traditional healers on the treatment of epilepsy. Carbamazepine was the most prescribed anti-epileptic drug with 33.2% of prescriptions. CONCLUSIONS: This study was the first to measure a percentage of use of herbal medicine for epilepsy in Peru. It would be interesting to conduct a pharmacological evaluation of the most commonly used species on epileptic models to validate and secure their use.

Prevalence, Age Profile, and Associated Risk Factors for Hymenolepis nana Infection in a Large Population-Based Study in Northern Peru.

Hymenolepis nana, the dwarf tapeworm, is a common intestinal infection of children worldwide. We evaluated infection and risk factor data that were previously collected from 14,761 children aged 2-15 years during a large-scale program in northern Peru. We found that 1,124 of 14,761 children (7.61%) had H. nana infection, a likely underestimate given that only a single stool sample was examined by microscopy for diagnosis. The strongest association with infection was lack of adequate water (adjusted prevalence ratio [aPR] 2.22, 95% confidence interval [CI] 1.82-2.48) and sanitation infrastructure in the house (aPR 1.94, 95% CI 1.64-2.29). One quarter of those tested did not have a bathroom or latrine at home, which doubled their likelihood of infection. Similarly, one quarter did not have piped public water to the house, which also increased the likelihood of infection. Continued efforts to improve access to basic water and sanitation services will likely reduce the burden of infection in children for this and other intestinal infections.

Assessing Ultrasonography as a Diagnostic Tool for Porcine Cysticercosis.

BACKGROUND: Taenia solium inflicts substantial neurologic disease and economic losses on rural communities in many developing nations. "Ring-strategy" is a control intervention that targets treatment of humans and pigs among clusters of households (rings) that surround pigs heavily infected with cysticerci. These pigs are typically identified by examining the animal's tongue for cysts. However, as prevalence decreases in intervened communities, more sensitive methods may be needed to identify these animals and to maintain control pressure. The purpose of this study was to evaluate ultrasonography as an alternative method to detect pigs heavily infected with T. solium cysts. METHODOLOGY/PRINCIPAL FINDINGS: We purchased 152 pigs representing all seropositive animals villagers were willing to sell from eight communities (pop. 2085) in Piura, Peru, where T. solium is endemic. Tongue and ultrasound examinations of the fore and hind-limbs were performed in these animals, followed by necropsy with fine dissection as gold standard to determine cyst burden. We compared the sensitivity and specificity of ultrasonography with tongue examination for their ability to detect heavy infection (≥ 100 viable cysts) in pigs. Compared to tongue examination, ultrasonography was more sensitive (100% vs. 91%) but less specific (90% vs. 98%), although these differences were not statistically significant. The greater sensitivity of ultrasound resulted in detection of one additional heavily infected pig compared to tongue examination (11/11 vs. 10/11), but resulted in more false positives (14/141 vs. 3/141) due to poor specificity. CONCLUSIONS/SIGNIFICANCE: Ultrasonography was highly sensitive in detecting heavily infected pigs and may identify more rings for screening or treatment compared to tongue examination. However, the high false positive rate using ultrasound would result in substantial unnecessary treatment. If specificity can be improved with greater operator experience, ultrasonography may benefit ring interventions where control efforts have stalled due to inadequate sensitivity of tongue examination.