Dataset Information

First report and molecular characterization of Cryptosporidium spp. in humans and animals in Khartoum state, Sudan.

ABSTRACT: Background and Aim:Cryptosporidium is recognized to infect several mammalian species as well as humans, causing substantial economic losses and serious public health concern. Infected animals can be a source of environmental contamination and human infections. In general, the occurrence of Cryptosporidium species in animals and human in Sudan and zoonotic importance is not well documented. This study aimed to identify Cryptosporidium spp. infecting different animal species and humans and to compare between different isolates obtained. Materials and Methods:To provide molecular information about Cryptosporidium in animals and humans, both modified Ziehl-Neelsen (MZN) specific stain and molecular assay were used. Concentration techniques followed by three protocols of DNA extraction were carried out. After microscopic screening of 263 fecal samples (goats [n=197], cattle [n=12], sheep [n=12], and human [n=42]), 61 positive and 30 negative, randomly selected samples were used in nested polymerase chain reaction (PCR) targeting part of the 18S RNA. Results:Nested PCR amplification confirmed 91.8% (56/61) of microscopic-positive samples. 8.2% (5/61) of negative samples by PCR (positive by microscopy) were considered false negatives. Sequencing followed by alignment of the 14 isolates indicated that all samples were identical (100%) and belonged to Cryptosporidium parvum. Conclusion:MZN staining procedure is reliable for the routine diagnosis of Cryptosporidium; cetyltrimethylammonium bromide extraction buffer and nested PCR targeting 18S rRNA gene are reliable and useful in epidemiological studies of this parasite.

SUBMITTER: Adam KY

PROVIDER: S-EPMC6431811 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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First report and molecular characterization of <i>Cryptosporidium</i> spp. in humans and animals in Khartoum state, Sudan.

Adam Kaltoum Yagoub KY Ismail A A AA Masri M A MA Gameel A A AA

Veterinary world 20190131 1

<h4>Background and aim</h4><i>Cryptosporidium</i> is recognized to infect several mammalian species as well as humans, causing substantial economic losses and serious public health concern. Infected animals can be a source of environmental contamination and human infections. In general, the occurrence of <i>Cryptosporidium</i> species in animals and human in Sudan and zoonotic importance is not well documented. This study aimed to identify <i>Cryptosporidium</i> spp. infecting different animal s ...[more]

PMID: 30936674

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Project description:Cryptosporidium is an important zoonotic parasite globally. Few studies have examined the ecology and epidemiology of this pathogen in rural tropical systems characterized by high rates of overlap among humans, domesticated animals, and wildlife. We investigated risk factors for Cryptosporidium infection and assessed cross-species transmission potential among people, non-human primates, and domestic animals in the Gombe Ecosystem, Kigoma District, Tanzania. A cross-sectional survey was designed to determine the occurrence and risk factors for Cryptosporidium infection in humans, domestic animals and wildlife living in and around Gombe National Park. Diagnostic PCR revealed Cryptosporidium infection rates of 4.3% in humans, 16.0% in non-human primates, and 9.6% in livestock. Local streams sampled were negative. DNA sequencing uncovered a complex epidemiology for Cryptosporidium in this system, with humans, baboons and a subset of chimpanzees infected with C. hominis subtype IfA12G2; another subset of chimpanzees infected with C. suis; and all positive goats and sheep infected with C. xiaoi. For humans, residence location was associated with increased risk of infection in Mwamgongo village compared to one camp (Kasekela), and there was an increased odds for infection when living in a household with another positive person. Fecal consistency and other gastrointestinal signs did not predict Cryptosporidium infection. Despite a high degree of habitat overlap between village people and livestock, our results suggest that there are distinct Cryptosporidium transmission dynamics for humans and livestock in this system. The dominance of C. hominis subtype IfA12G2 among humans and non-human primates suggest cross-species transmission. Interestingly, a subset of chimpanzees was infected with C. suis. We hypothesize that there is cross-species transmission from bush pigs (Potaochoerus larvatus) to chimpanzees in Gombe forest, since domesticated pigs are regionally absent. Our findings demonstrate a complex nature of Cryptosporidium in sympatric primates, including humans, and stress the need for further studies.

Project description:BackgroundCryptosporidiosis and giardiasis are significant parasitic diseases shared between humans and domestic animals. Due to the close contact between humans and domestic animals in rural areas, it is important to consider the potential transmission of zoonotic parasites from infected domestic animals to humans. This investigation aimed to determine the prevalence and molecular characteristics of Cryptosporidium spp. and Giardia duodenalis in domestic animals and villagers.MethodsA total of 116 fecal samples from villagers and 686 fecal samples from domestic animals in Heilongjiang Province, China, were analyzed for two parasites using nested polymerase chain reaction (PCR) targeting various genetic loci and DNA sequence analysis of the PCR products.ResultsBy sequence analysis of the SSU rRNA gene, the prevalence of Cryptosporidium in humans was 0.9% (1/116), with one species of C. parvum (n = 1) detected; among domestic animals, the prevalence was 2.6% (18/686), with five species identified: C. suis (n = 7) and C. scrofarum (n = 7) in pigs, C. meleagridis (n = 1) in chickens, C. andersoni (n = 1) in cattle, and C. canis (n = 2) in foxes. C. parvum and C. canis were further subtyped as IIdA19G1 and XXa4 on the basis of gp60 gene. Regarding G. duodenalis, based on the SSU rRNA, bg, gdh, and tpi genes, the prevalence in domestic animals was 5.1% (31/608), with three assemblages identified: A (n = 1) in pigs, D (n = 1) in foxes, and E (n = 27) in geese, cattle, pigs, ducks, and sheep, along with mixed infection of A + E (n = 1) in one pig and B + E (n = 1) in one sheep. No G. duodenalis was detected in humans (0/116).ConclusionsThe present results show that no overlap of subtypes between animals and villagers was found in Cryptosporidium spp. and G. duodenalis, indicating a minor role of domestic animals in infecting humans in this population. However, the presence of zoonotic protozoa in domestic animals highlights the need for special attention to high-risk individuals during close contact with domestic animals.

Project description:BackgroundCervical cancer is considered the third leading cause of death among women worldwide, and human papillomavirus was identified as a major causative agent for developing cervical cancer.ObjectivesThis study aimed to assess the knowledge and attitudes towards cervical cancer prevention among women in Khartoum state, Sudan.DesignA community-based cross-sectional study implemented in Khartoum state, Sudan, from 1 August 2020 to 1 September 2020.MethodsWe conducted a descriptive cross-sectional community-based study using an electronic questionnaire for data collection. Descriptive statistics, frequency, mean, and percentage were computed.ResultsThe study included 716 female participants with a mean age of 27.6 + 8.7 years. 580 (81.0%) and 229 (32.0%) had heard about cervical cancer and Pap test, respectively. cervical cancer was assumed related to alcohol consumption 109 (15.2%), giving birth to many children 51 (7.1%), ageing 118 (16.5%), and having many sexual partners 335 (46.8%). In addition, 300 (41.9%) attributed cervical cancer to having human papillomavirus infection, 256 (35.6%) to the prolonged use of contraceptives, and 162 (22.6%) to smoking. Knowledge about the best time to be vaccinated against human papillomavirus, 110 (15.4%) stated it is better after marriage. Regression models to predict the effectors on participants' knowledge and attitudes showed a low standard deviation of the estimates with higher values of the adjusted R2 [R: 0.041, 0.017, and 0.006; std: 1.527, 0.417, and 0.426]. This indicates the combined influence of occupation, educational level, family income, and marital status on the participant's knowledge and attitude levels.ConclusionThis study revealed that the participant's knowledge and attitudes levels are mainly driven by their occupation, educational level, family income, and marital status altogether. This underscores the need for a countrywide community engagement campaign through health education and raising awareness sessions, and massive social media to sensitize the community and healthcare providers about the risk of cervical cancer and the available prevention and control measures.

Dataset Information

First report and molecular characterization of Cryptosporidium spp. in humans and animals in Khartoum state, Sudan.

Publications

First report and molecular characterization of <i>Cryptosporidium</i> spp. in humans and animals in Khartoum state, Sudan.

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