aim : the aim of the present study was to determine the species and genotypes of cryptosporidium spp. among children with diarrhea by pcr- rflp using the trap-c2 gene. background : cryptosporidium is a globally distributed protozoan parasite and one of the most common causes of infection and diarrhea in humans. patients and methods : four hundred and sixty nine stool samples were collected from...

background: in view of the massive rural-to-urban migration in nigeria, investigations on transmission of urinary schistosomiasis were carried out in ur-ban and semi-urban communities in nike lake area of enugu state, nigeria. methods : urine samples of school children were tested for micro-haematuria using reagent strips followed by microscopic examination for schistosoma haematobium eggs. wat...

The declining prevalence of leprosy has not been matched by a declining incidence. Widespread adoption of multiple drug therapy (MDT) in closely monitored control programmes has not prevented transmission of Mycobacterium leprae. Despite the rarity of lepromatous patients, most of those living in endemic areas have immunological evidence of exposure to M. leprae. This paradox could be explained...

Anaplasma marginale Theiler is a tick-borne intraerythrocytic rickettsial pathogen of cattle that also can be mechanically transmitted by biting flies. Rickettsemia during the acute phase of infection may reach as high as 10(9) infected erythrocytes (IEs) per milliliter of blood. Animals that survive acute infection develop a life-long persistent infection that cycles between 10(2.5) and 10(7) ...

The mode of infection transmission has profound implications for effective containment by public health interventions. The mode of smallpox transmission was never conclusively established. Although, "respiratory droplet" transmission was generally regarded as the primary mode of transmission, the relative importance of large ballistic droplets and fine particle aerosols that remain suspended in...

OBJECTIVES To identify cases of hepatitis B infection after vaccination in Kimberley residents and determine maternal serostatus as a potential indicator of mode of transmission. DESIGN AND PARTICIPANTS Retrospective review of Kimberley residents with notified hepatitis B infection using records of vaccination history and child and maternal serology. MAIN OUTCOME MEASURES Confirmed cases of...

Transmission reduction is a key component of global efforts to control and eliminate malaria; yet, it is unclear how the density of transmission stages (gametocytes) influences infection (proportion of mosquitoes infected). Human to mosquito transmission was assessed using 171 direct mosquito feeding assays conducted in Burkina Faso and Kenya. Plasmodium falciparum infects Anopheles gambiae eff...

Introduction: The first case of HIV-infection in Iran was a hemophilic child who was infected by imported blood products in 1989. Since then, the HIV epidemic in Iran has undergone significant changes. This study investigated the time variations of the epidemiology of reported HIV/AIDS -infections during 2011-2017 in Yazd, Iran. Methods: This analytical cross-sectional study was carried out us...

The Persian Gulf and its shores are important and strategic areas with a large variety of fish species. Betanodavirus infection is known to be a serious threat to susceptible fish and causing economic damages to the fisheries and fishing industry. Concerning to isolation and confirmation of VNN virus in the Mullet fish (Chelon aurata and C. saliens) in the Caspian Sea and its damages on Mullet ...