Cryptosporidium and other enteric parasitic infections in HIV-seropositive individuals with and without diarrhoea in Osogbo, Nigeria.

The primary objective of this cross-sectional study is to correlate the presence of Cryptosporidium and other gastrointestinal parasites with the presence of diarrhoea in human immunodeficiency virus (HIV)-infected patients. Stool samples from 96 HIV-seropositive cases were examined for non-opportunistic parasites using the direct and formol-ether concentration methods, while the modified Ziehl-Neelsen technique was used to detect Cryptosporidium spp. The overall prevalence of Cryptosporidium spp. was 54.2%. Other intestinal parasites detected included Ascaris lumbricoides (59.4%), hookworm (5.2%), Entamoeba histolytica (3.1%), Strongyloides stercoralis (1%) and Taenia spp. (1%). Infection inmales was more common (68.2%) than in females (55.4%) but the difference was not statistically significant. Therewas a significant association between Cryptosporidium infection and CD4+ count (P=0.0001), with the highest parasite prevalence (90%) observed among patients who had the lowest CD4+ count (<200 cells/mm3). Forty-five (86.5%) patients with Cryptosporidium infection presented with diarrhoea and the difference between those with and without diarrhoea was statistically significant (P=0.0001). There was a statistically significant difference (P=0.0001) among the age groups, with the 41-50 group showing the highest prevalence (84.6%) of infection. Co-infection was observed in 13.5% of the patients. As no drug is currently available for the treatment of cryptosporidiosis, emphasis should be placed on educating HIV-infected individuals about prevention.

Genetic diversity of Plasmodium falciparum field isolates from south western Nigeria.

BACKGROUND: Plasmodium falciparum the main causative agent of malaria is an important public health vector. With the use of PCR, its genetic diversity has been extensively studied with dearth information from Nigeria. METHODS: In this study, 100 P. falciparum strains merozoite surface protein 1(msp-1), merozoite surface protein 2 (msp-2) and Glutamate rich protein (Glurp) from Ogun State General Hospitals were characterized. The genetic diversity of P. falciparum isolates was analyzed by restriction fragment length polymorphism following gel electrophoresis of DNA products from nested polymerase chain reactions (PCR) of their respective allelic families KI, MAD 20, RO33 (MSP-1);FC27, 3D7 (MSP-2) and Glutamate rich protein respectively. RESULTS: Majority of the patients showed monoclonal infections while multiplicity of the infection for msp-1 and msp-2 were 1.1 and 1.2 respectively. The estimated number of genotypes was 8 msp-1 (4 KI; 3 MAD; 1 RO33) and 6 msp-2 (3 FC27; 3 3D7). 80% of the isolates coded for Glurp with allelic size ranged between 700 and 900 bp. CONCLUSION: The allelic distributions however were similar to those previously reported in other endemic malaria countries. Future studies will be designed to include other malaria endemic regions of Nigeria such as the oil exploration regions.