A full-scale survey, in Kelibia, Tunisia, screening 34,874 persons started on July 1, 1985. The accuracy of this survey was evaluated by a second survey using a randomized sample of 1,673 subjects (control survey). Better selection and training of the interviewers during the control survey led to a higher positive predictive value with no modification in prevalence ratios of neurologic disorders. The control survey helped to validate the full-scale survey data which were then used to establish the prevalence ratios of major neurologic disorders in Kelibia. Prevalence ratios, age-adjusted to the WHO population, were compared to those of studies using similar methodology. Migraine prevalence ratios in Nigeria, Ecuador, and Kelibia were equivalent. Epilepsy and Parkinson''s disease prevalence ratios were close to those of other similar studies. The stroke prevalence ratio was low, compared to other studies, but was not the lowest. It seems that in Kelibia, stroke does not constitute a public health problem as it does in the USA or urban China. The large full-scale survey, in Kelibia, provided estimates of prevalence ratios for stroke, epilepsy, migraine and other common neurologic disorders for comparisons with other countries. However, definitions of neurologic disorders and diagnostic criteria differ from one study to another making difficult the comparison of results between different countries. Had the WHO protocol developed well-defined criteria and a standardized neurologic examining tool, more accurate comparisons could have been made.

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This paper is a contribution to the evaluation of the petroleum potential of southern Tunisia. Its purpose is to report on the burial and thermal histories of the Gafsa‐Metlaoui Basin and the surrounding area in the time interval between the Triassic and the Quaternary. We have used a one‐dimensional deterministic model, which enabled us to integrate the burial and thermal influences on potential source rocks with kinetic parameters, in order to define the timing of hydrocarbon generation and expulsion in relation to the main structural episodes in the study area. The Mesozoic burial history of this basin is characterized by two principal phases of rifting, each of which was followed by a brief episode of thermal (post‐rift) subsidence. The first phase occurred during the Triassic and Jurassic, and was related to the breakup of Gondwana; the second phase occurred during the Cretaceous and Early Tertiary, and was related to the opening of the neo‐Tethyan Mediterranean Sea. Geothermal studies of this basin have allowed us to determine an average surface heat flow of 60 m W/sq. m and an average geothermal gradient of about 25.5d̀C/km. Middle Jurassic source rocks expelled oil from the Cenomanian (about 100 million years ago) to the Quaternary.

Nail psoriasis has variable prevalence and heterogeneous aspects. Many of them could mimic onychomycosis (OM). It has been suggested that patients with nail psoriasis are at high risk of OM. The aim of our study was to determine the epidemiological and clinical characteristics of nail psoriasis and to estimate the frequency and the factors associated with OM in psoriatic patients. The studied group included 163 patients with psoriasis aged 18 years or older. Epidemiological and clinical data, as well as the severity of skin and nails disease by evaluating the Psoriasis Area Severity Index (PASI) and Nail Area Psoriasis Severity Index (NAPSI) scores were specified. Mycological testing was performed for patients with nail alterations. Nail involvement was found in 71.2% of patients. The most common nail alterations were subungual hyperkeratosis and onycholysis. The mean NAPSI score was 11.6. Mycological testing was performed in 104 patients with onychodystrophy. OM was diagnosed in 53% of the cases. Dermatophytes were the most isolated pathogens. OM was associated with male gender, but not with age, NAPSI, or PASI score. Psoriasis is one of the dermatoses that most commonly affect the nail. Available data about the association between nail psoriasis and OM are controversial. However, mycological testing should be routinely performed on psoriatic nails.

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