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Biomedical subjects

A Nadim

Publications and source records attributed to A Nadim.

51 records · Page 3Linked to original sources
PubMedDate not supplied

Numerical simulation and experimental validation of blood flow in arteries with structured-tree outflow conditions.

Blood flow in the large systemic arteries is modeled using one-dimensional equations derived from the axisymmetric Navier-Stokes equations for flow in compliant and tapering vessels. The arterial tree is truncated after the first few generations of large arteries with the remaining small arteries and arterioles providing outflow boundary conditions for the large arteries. By modeling the small arteries and arterioles as a structured tree, a semi-analytical approach based on a linearized version of the governing equations can be used to derive an expression for the root impedance of the structured tree in the frequency domain. In the time domain, this provides the proper outflow boundary condition. The structured tree is a binary asymmetric tree in which the radii of the daughter vessels are scaled linearly with the radius of the parent vessel. Blood flow and pressure in the large vessels are computed as functions of time and axial distance within each of the arteries. Comparison between the simulations and magnetic resonance measurements in the ascending aorta and nine peripheral locations in one individual shows excellent agreement between the two.

Adult↗
PubMedDate not supplied

Epidemiology of cutaneous leishmaniasis in Iran: B. Khorassan Part V: Report on a focus of zoonotic cutaneous leishmaniasis in Esferayen.

During August and September 1975, an epidemiological investigation was carried out in another focus of cutaneous leishmaniasis in Khorassan province namely the Esferayen district located in the north western part of this province. The disease in Esferayen area is of zoonotic type having Rhombomys opimus as reservoir and P. papatasi as vector.

Adolescent↗
PubMedDate not supplied

Studies on cutaneous leishmaniasis in Khuzestan, Iran. Part II. The status of sandflies.

In these studies, more than 25,000 specimens were collected from different parts of Khuzestan Province. Sandflies were caught by aspirator from indoor, and with sticky traps from outdoor resting places. We found 10 species of Phlebotomus and 12 species of Sergentomyia in our studies. The sandfly season extends from March through late November. There are two peaks in the density curve of most species in plain and littoral areas, one in early June and the second in late September; in mountainous areas there is a peak in the density curve in September.

Animals↗
PubMedDate not supplied

Cutaneous leishmaniasis in Saudi-Arabia: an overview.

Taking advantage of an investigation on cutaneous leishmaniosis in Saudi Arabia, the authors present an overview of the situation in three main foci: those of Riyadh and El-Khardj, El Hassa and Bisha. They present a list of the twelve species of phlebotomine sandflies found in the country and out of which predominates Phlebotomos papatasi, the possible vector of the disease in these foci.

Diptera↗
PubMedDate not supplied

Effectiveness of leishmanization in the control of cutaneous leishmaniasis.

To find out the effectiveness of leishmanization in the control of zoonotic cutaneous leishmaniasis, more than 250 persons were inoculated by the 5th subculture of a strain of L. tropica major kept on laboratory mice. About 47% took with incubation period ranging from less than one month to more than 1 year. The duration of the lesion was from 3 months 1/2 to 13 months 1/2. The two year incidence of the natural infection in this hyperendemic area was 0.8% for "takes", and 10.5% for "non-takes" and 40% for controls. By doing leishmanin skin test two years after inoculation, it is concluded that leishmanization has a protective effect of about 80% in this endemic area.

Child, Preschool↗
PubMedDate not supplied

Urban cutaneous leishmaniasis in Kerman, Southeast Iran.

To determine the prevalence and the trend of urban cutaneous leishmaniasis in the city of Kerman, Southeast Iran, a survey was made in more than 35,000 children in 77 elementary schools and 36 junior high schools. The overall prevalence of the active lesion was 0.8% and the scar rate 4.4%, cases had been few before 1970, then started to increase and reached a maximum in 1977. Most probably, P. sergenti, is the vector because more than 95% of indoor sandflies were of this species. Active season of Sandflies was from late April to late October.

Adolescent↗
PubMedDate not supplied

Seasonal and hourly activity of Rhombomys opimus in the endemic focus of zoonotic cutaneous leishmaniasis in Isfahan, Iran.

For the study of the seasonal and hourly activity of the great gerbil, Rhombomys opimus in an endemic focus of zoonotic cutaneous leishmaniasis (Isfahan), two colonies were selected in which the number of gerbils was counted by visual sighting. The study shows that the gerbils are quite active from August through December. After a decrease in January and February, once again they become active but not as much as early Autumn. In the hot months of the year the gerbils are active only early in the morning and late in the afternoon. In the cooler months, they are active in the middle of the day. In cold parts of the year the activity of gerbils decreases very considerably.

Animals↗