Sammy Olufemi Sam-Wobo

• HND, BSc, MSc, PhD
• Professor (Full) at Federal University of Agriculture

Over the past decade, Mass Administration of Medicines (MAM) has been a key strategy for controlling schistosomiasis and soil-transmitted helminthiasis (STHs) in Anambra State, Nigeria. This longitudinal study, conducted from 2017 to 2019, evaluated the impact of interventions for controlling schistosomiasis (SCH) and STHs in recipient communities....

Background Over the past decade, mass drug administration (MDA) has been a crucial strategy in controlling schistosomiasis and soil-transmitted helminthiasis in Anambra State, Nigeria. This longitudinal study from 2017 to 2019, evaluated the implementation of interventions introduced for the control of schistosomiasis (SCH) and soil-transmitted hel...

The sibling species composition of Simulium damnosum sensulato and abundance of these sibling species in two communities (Opeji and Imala-Odo) of Ogun State south-western Nigeria was carried out in the wet months (May to October). Morphological identification of black flies using standard protocol was done from 07:00hr-18:00hr twice every two weeks...

This study highlights the physical and chemical composition of surface water bodies that serves as source of irrigation water used in Ijebu East (IE), Yewa North (YN) and Ewekoro (EW) LGAs for leafy vegetable cultivation in Ogun state. Analytical results from water samples collected from surface water from farms across the selected study locations...

The level of knowledge possessed by community members determines the role it plays in preventing Neglected Tropical Diseases (NTDs) within the population. Our cross-sectional study assessed the knowledge, attitude and practices (KAP) towards Lymphatic Filariasis (LF) across three communities located in Ose Local Government Area (LGA) Ondo State, So...

Parasites constitute a major problem for fish health and their prevalence hamper fish growth and productivity by increasing their morbidity and mortality. Fish endoparasites are often associated with zoonotic disease in humans. The aim of this study was to determine the endoparasitic prevalence and feeding habits of Oreochromis aureus, Amia calva a...

Objective: This study, conducted between March 2015 and July 2016, investigated the sensitivity and specificity of the OV-16 RDT and Dried Blood Spot (DBS) Enzyme-Linked Immunosorbent Assay (ELISA) for skin snip microfilaria (MF) detection in Ogun State. Methods: Five hundred and eighty-eight (588) members of 16 first-line communities in 8 endemic...

Exposure to bioaerosols poses significant health risks to occupants of buildings, especially in tropical areas due to its climatic characteristics that favour airborne bacterial growth. This study investigated the levels and composition of indoor and outdoor airborne bacteria in residential buildings in Benin Metropolis. Air samples were collected...

Onchocerciasis caused by infection with Onchocerca volvulus is a disease of public health importance and is highly associated with disability. As Nigeria is aiming at eliminating onchocerciasis by 2030, there is a need to develop newer tools to map disease prevalence and identify environmental factors driving disease prevalence, even in places that...

This study investigated the knowledge and perceptions of bioethics among biomedical researchers in Osun State, Nigeria using a semi-structured self-administered questionnaire during a capacity workshop in November 2020. Demographic data, and attendee' awareness, knowledge, and perception on bioethics and need for ethical approvals for biomedical re...

Globally, malaria in pregnancy leads to severe complications such as abortion, stillbirth, premature delivery, low birth weight, and fetal underdevelopment. This study examined the prevalence and risk factors of malaria among pregnant women attending antenatal care in Osun State, Nigeria. Between July and December 2020, 555 pregnant women from ten...

Captive-held wild animals are those housed in zoological exhibits, rehabilitation centres, zoos, research stations, sanctuaries, aquaria, circuses, and plantations. However, parasitic diseases constitute one of the major problems causing mortality in these animals while in captivity. The effects range from sub-clinical to death; hence, the study wa...

This study reports the status of onchocerciasis and lymphatic filariasis (LF) in communities with low endemicity in Ogun-State, Nigeria. The Ov16/Wb123 biplex Rapid Diagnostic Test was used to screen 1,836 participants aged 5 years and above from 8 Local Government Areas (LGAs) from October to December, 2016. Skin snips and night blood were also us...

Soil Transmitted Helminths (STHs) are Neglected Tropical Diseases of global public health importance. This study evaluated the efficacy of albendazole (ALB) amongst primary school children aged 6 – 16 years in STH-endemic communities in Ogun State, Nigeria. Demographic characteristics were obtained and stool samples were collected and analysed by K...

National lymphatic filariasis elimination programme (NLFEP) of Federal Ministry of Health sets to provide status of LF in the country before 2020. Borno State, situated in the North East political zone of Nigeria with an estimated population of 4.1million had been enmeshed in insurgency for over a decade. Following an initial mapping between 2008 a...

Urinary schistosomiasis is considered a major public health parasitic disease in African communities. Prior to this study, Nsugbe community was not considered endemic for the disease and as such was not involved in Praziquantel-Preventive Chemotherapy (PC). Longitudinal study of 281 consented pupils aged 5-16 years was carried out with aim of deter...

Background: The need to assess the gaps in knowledge and perception on bioethics among biomedical researchers has become necessary considering the increasing numbers of researchers and research outputs in sub-Saharan Africa. This study, therefore, investigated the knowledge and perceptions of biomedical researchers in Osun State, southwest Nigeria....

PurposeIntestinal helminthiasis among pupils is a major impediment to their well-being and development. This 2-year study determined how home-grown school feeding programme (HGSFP) impacted on pupils’ school attendance and created opportunity for more children to assess interventions geared towards the prevention and possible elimination of intesti...

Mosquitoes are known to transmit lymphatic filariasis (LF) which causes varying disease conditions in humans. This study assessed indoor mosquitoes and their parity status in some communities of Ose Local Government Area, Ondo State, Nigeria. Endophilic mosquitoes were collected from 122 consented participants' houses of various building structures...

Captive-held wild animals are those housed in zoological exhibits, rehabilitation centres, zoos, research stations, sanctuaries, aquaria, circuses, and plantations. However, parasitic diseases constitute one of the major problems causing mortality in these animals while in captivity. The effects range from sub-clinical to death; hence, the study wa...

The knowledge, attitude, and practices (KAP) people hold towards a new disease could play a major role in the way they accept measures put in place to curb its spread as Symptoms of COVID-19 are similar to those of other endemic diseases, especially malaria. A cross-sectional KAP/symptomatology online survey was conducted from August –September 202...

Abstract Background The impact of single-dose mass drug administration (MDA) of ivermectin for onchocerciasis on mosquito populations was investigated in Ogun State, Nigeria. Methods Indoor and outdoor collection of mosquitoes was carried out in two intervention (IC) and two control communities (CC) at three different periods: pre-MDA (baseline), 2...

An epidemiological study was conducted in four communities of Yewa-South Local Government Area of Ogun State to determine the prevalence of lymphatic filariasis. Also investigated was the intensity among the study participants. Three hundred and sixty-two participants of both sexes and age ranging from 5 to 85 years were examined. Blood samples for...

The knowledge, attitude, and practices (KAP) people hold towards a new disease could play a major role in the way they accept measures put in place to curb its spread as Symptoms of COVID-19 are similar to those of other endemic diseases, especially malaria. A cross-sectional KAP/symptomatology online survey was conducted from August-September 2020...

Abstract The knowledge, attitude, and practices (KAP) people hold towards a new disease could play a major role in the way they accept measures put in place to curb its spread as Symptoms of COVID-19 are similar to those of other endemic diseases, especially malaria. A cross-sectional KAP/symptomatology online survey was conducted from August –Se...

This study was carried out across the six geopolitical zones to assess knowledge and health seeking behaviors of Nigerians during the first wave of COVID-19 pandemic lockdown in order to understand the seemingly low cases of COVID-19 in Nigeria. Structured and pretested short questionnaires were employed to obtain information electronically and phy...

This study was carried out across the six geopolitical zones to assess knowledge and health seeking behaviors of Nigerians during the first wave of COVID-19 pandemic lockdown in order to understand the seemingly low cases of COVID-19 in Nigeria. Structured and pretested short questionnaires were employed to obtain information electronically and phy...

Abstract Background: Plasmodium is efficiently transmitted majorly by female Anopheline mosquitoes: Anopheles funestus and Anopheles gambiae sensus lato. A gap exists with respect to primary vector control strategies; indoor residual spray requires expertise while long-lasting insecticidal nets (LLINs) cover early night sleepers. Objectives: To cov...

Background: This study investigated the impacts of single-dose mass drug administration (MDA) with ivermectin for onchocerciasis and lymphatic filariasis on mosquito populations in Ogun State, Nigeria. Methods: Mosquito samples were collected indoor and outdoor in two communities before and after MDA. The communities were pair-matched with two othe...

This study assessed the efficacy and safety of albendazole (ALB) amongst soil-transmitted helminth (STH) infected school aged children (SAC) cross-section ally in Odeda Local Government Area (LGA), Ogun State, Nigeria. Consented 485 pupils between the ages of 5-16 years were examined for STH infections using the Kato-katz technique at baseline. All...

Background: Urinary schistosomiasisis a debilitating Neglected Tropical Disease (NTD) spreads when infected people urinate close to a water source, contaminating it with the larvae of the parasite, it is associated with lack of access to water, sanitation and hygiene (WASH) facilities in rural and semi-urban settlements. This study was conducted to...

Polyparasitism is widespread in many communities in Sub-Saharan Africa. However, there is paucity of data on polyparasitism in infants and preschool-aged children (IPSAC), to inform policy developments. Therefore, a survey of 1110 consented IPSAC was undertaken in Egbedore Local Government Area (LGA), Osun State, Nigeria, to determine the prevalenc...

Background: Plasmodium is efficiently transmitted majorly by female Anopheline mosquitoes: Anopheles funestus and Anopheles gambiae sensus lato. A gap exists with respect to primary vector control strategies; indoor residual spray requires expertise while long-lasting insecticidal nets (LLINs) cover early night sleepers. Objectives: To cover the ti...

Background: Plasmodium is efficiently transmitted majorly by female Anopheline mosquitoes: Anopheles funestus and Anopheles gambiae sensus lato. A gap exists with respect to primary vector control strategies; indoor residual spray requires expertise while long-lasting insecticidal nets (LLINs) cover early night sleepers. Objectives: To cover the ti...

Background: Schistosomiasis and Soil-transmitted helminthiasis cause considerable morbidity and mortality in developing countries, especially among children. To this end it, a cross-sectional survey to determine the pattern of Schistosomiasis and Soil-transmitted helminthiasis co-infection was undertaken among primary school pupils in Oduma Commun...

This study determined the factors that influence the economic burden of water-borne diseases and the associated financial cost for rural households in southwestern Nigeria. A multi-stage random sampling method was used to select four hundred and thirty-seven rural households from whom data were collected for the study. Data were analyzed using desc...

Background: This serological study conducted between March and July 2015 investigated the status of onchocerciasis in Ogun State, Nigeria after a decade of mass drug administration (MDA) with ivermectin. Baseline information from the rapid epidemiological mapping of onchocerciasis (REMO) prior to MDA had indicated that Ogun State was meso-endemic t...

Background: This study reports knowledge of onchocerciasis and surrounding factors from the perspective of community members, Community drug distributors and health workers in eight endemic LGAs of Ogun State, Nigeria. Methods: Using structured questionnaires and Focus Group Discussion, a total of 417 community members, 37 health workers and 42 CDD...

Introduction: Control of intestinal helminthiasis among pupils improves their nutritional status. This study identified the risk factors and socio-demographic determinants of intestinal helminthiasis among children in primary schools that implemented Home Grown School Feeding Program (HGSFP) in Anambra State, Nigeria.Methods: Eight hundred and fort...

Intestinal helminthiasis still persists among pupils; as this study evaluated its current status in pupils where Home Grown School Feeding Program (HGSFP) was implemented. Consented 1677 primary pupils aged 6-11 years from schools in three senatorial zones of Anambra State, Nigeria were enrolled. Fresh faecal samples collected from all pupils were...

A cross-sectional survey was carried out in primary schools to determine prevalence, intensity and spatial co-distribution of Schistosomiasis and soil transmitted helminths (STH) infections in Ogun State, Nigeria. A total of 2148 pupils from 42 schools were examined for Schistosoma and STH infections from urine and fresh fecal samples respectively....

Introduction: Control of intestinal helminthiasis among pupils improves their nutritional status. This study identified the risk factors and socio-demographic determinants of intestinal helminthiasis among children in primary schools that implemented Home Grown School Feeding Program (HGSFP) in Anambra State, Nigeria. Methods: Eight hundred and for...

Background: This serological study conducted between March and July 2015 investigated the status of onchocerciasis in Ogun State, Nigeria after a decade of mass drug administration (MDA) with ivermectin. Baseline information from the rapid epidemiological mapping of onchocerciasis (REMO) prior to MDA had indicated that Ogun State was meso-endemic t...

S U M M A R Y The Nigerian national control programme (NCP) for schistosomiasis does not have a specific action plan for female genital schistosomiasis (FGS), mainly due to gaps in epidemiological and clinical surveillance. To address this, we conducted a pilot investigation for FGS in girls (>5 and ≤15 years) and adult women (≥16 years) in four ru...

Background: There is dearth of information on perinatally acquired malaria, as well as its burden in Nigeria. We determined the prevalence of pregnancy-associated malaria and its burden among parturients in Abeokuta, Ogun State. Materials and methods: Blood films from 211 parturients were prepared, stained with 10% Giemsa and examined using micr...

Objective: This study compared the prevalence of intestinal helminths in Water, Sanitation and Hygiene (WASH) intervention and non-intervention communities in Abeokuta, Nigeria. Methods: Stool samples were collected from 225 respondents in a study carried out between July and November, 2014. Stool samples were examined for presence of helminths usi...

This study investigates the prevalence of malaria and evaluates Long Lasting Insecticide Nets (LLINs) utilization for malaria control in Ikenne LGA, Ogun State, Nigeria. A cross-sectional survey was conducted in five major communities in Ikenne Local Government Area (LGA) namely: Ilisan, Ikenne, Iperu, Ogere and Irolu. Fifty (50) households were sy...

Provision of water, sanitation and hygiene (WASH) resources has been advocated as necessary add-on strategy for sustainable control of soil-transmitted helminthiasis (STH) alongside annual mass drug administration (MDA) of albendazole to endemic communities. This study investigated the burden of STH and status of WASH resources in eight rural commu...

Provision of water, sanitation and hygiene (WASH) resources has been advocated as necessary add-on strategy for sustainable control of soil-transmitted helminthiasis (STH) alongside annual mass drug administration (MDA) of albendazole to endemic communities. This study investigated the burden of STH and status of WASH resources in eight rural commu...

Helminths are associated with parasitism for both man and animals causing serious diseases and even mortality. This study assessed the presence and status of helminth infections in birds kept at the Federal University of Agriculture (FUNAAB) Zoo Park. Early morning freshly voided faecal samples were collected from cages of 7 different species of bi...

Helminths are associated with parasitism for both man and animals causing serious diseases and even mortality. This study assessed the presence and status of helminth infections in birds kept at the Federal University of Agriculture (FUNAAB) Zoo Park. Early morning freshly voided faecal samples were collected from cages of 7 different species of bi...

Background: Aspergillosis has been identified as one of the hospital acquired infections but the contribution of water and inhouse air as possible sources of Aspergillus infection in immunocompromised individuals like HIV-TB patients have not been studied in any hospital setting in Nigeria. Objective: To identify and investigate genetic relation...

The burden of malaria and its associated problems in pregnancy can be reduced by the use of different malaria preventive measures. This study was conducted to determine the comparative effectiveness of three different malaria preventive measures on populations of parturient in Abeokuta, Ogun State, Nigeria. Blood samples from maternal placenta were...

This study reports information on human migration and its possible role in the spread of onchocerciasis in Ogun State. Employing structured questionnaire, information on history of migration and residency was obtained from a total of 2,169 participants selected from 32 communities (four from each of the eight meso-endemic LGA’s) receiving treatment...

Lymphatic filariasis (LF) is one of the neglected tropical diseases endemic in Nigeria. Epidemiological studies were conducted to determine the prevalence, distribution and clinical signs of the disease in three communities of Ose LGA, Ondo State from October 2014 to January 2015. One thousand and ninety consented participants enrolled for the stud...

A cytotaxonomic study was carried out to determine the species composition and dynamics of Simulium damnosum sensu lato in Oyan River, an onchocerciasis mesoendemic area in southwest Nigeria. Simulium larvae were collected fortnightly from different attachments between March and November 2012 fixed in Carnoy's solution for laboratory identification...

This study critically reviewed the spatial distributions of helminth infections in Nigeria within the last decade (2005-2015) and the need for urgent interventions in order to protect the susceptible populations against its morbidity and mortality. This study revealed that prevalence of intestinal helminth in the country has not declined since the1...

Aedes albopictus (Skuse) was first recorded in Nigeria in 1991 during a post epidemiological surveillance of yellow fever epidemics in Delta State. In this report, we present a map of the current distribution of Ae. albopictus and its possible epidemiological implications based on accessible records of mosquito fauna in Nigeria using electronic e-j...

Background. Placental malaria has long been acknowledged as a complication of malaria in pregnancy, and has been associated with poor pregnancy outcome in malaria-endemic areas. This study was conducted to determine the risk factors associated with occurrence of placental malaria in a population of parturients in Abeokuta Ogun State, Nigeria. Mater...

A longitudinal study covering 55 months evaluated the three diagnostic tools used for confirmation of prevalence of urinary schistosomiasis among 1151 consented primary school pupils in 13 communities of Edo State, Nigeria. Questionnaire, reagent strip method and parasitological examination were employed. Urine samples collected were processed usin...

Malaria parasites and packed cell volume offree range poultry was conducted on one hundred free range chickens collected from three communities in Abeokuta (Osiele, Lafenwa and Kuto). The results revealed that out of the 100 free range chickens examined, 13(13%) were infected with avian malaria parasite. Hematological parameter i.e. packed cell vol...

This study reports the ecological and attachment profile of Simulium damnosun sl larvae, water physico-chemical parameters and in-situ plants associated with larvae breeding along Ogun River systems, Ogun State from March to November 2012. A line transect 50m × 50m vegetation plot measured at the four cardinal points of the breeding sites was used...

Malaria caused by Plasmodium species is often observed in areas where malaria is endemic. Malaria prevalence in metropolitan Abeokuta of Ogun State, Nigeria was studied between October, 2012 and January 2013. Oral interviews were used to get personal data of participants. Blood samples were obtained from 384 consented participants from the seven pr...

Morphometric studies were carried out on Ascaris lumbricoides recovered after Antihelminthic Levamex (400 mg Levamisole) treatment of 960 school children in Ewekoro, Ado-odo-Ota and Ogun-Waterside Local Government of Ogun State, Nigeria. 986 worms were expelled, of which 613 (62.17%) were female worms and 373 (37.83%) were male worms. An overall av...

A study was carried out to determine the current status of urinary schistosomiasis on 552 pupils from seven primary schools in Abeokuta North and Abeokuta South Local Government Areas of Ogun State, Nigeria using haematuria and parasitological tests. Males that complied were 75% to 25% females. Children within the age-group of 10 to 14 years were m...

Schistosomiasis and soil-transmitted helminthiasis (STH) are public health problems in communities which lack basic social amenities with poor hygienic conditions. Studies were carried out to determine the prevalence and effect of schistosomes and soil-transmitted helminths infection on labour input on rice production in 9 rice-growing communities...

Seasonal fluctuations of the Simulium damnosum Theobald complex and the prevalence of Onchocerca volvulus Bickel in blackflies caught in river systems bordering the Nigeria–Benin border were assessed for their direct impact on the epidemiology of onchocerciasis in South-western Nigeria. Entomological evaluation and heteroduplex assay (HDA) techniqu...

Malaria is an important illness in fewer than five years old children in Nigeria which is accompanied with vomiting and severe anaemia that lead to infant and childhood mortality. In view of problems and implications associated with management of malaria at home, rectal artesunate is being introduced as pre-referral drug to reduced multiplication o...

Falciparum malaria is an important cause of death and illness in children in southwestern Nigeria which is accompanied with vomiting and severe anaemia. Rectal artesunate suppository (Plasmotrim-50/200 mg Artesunate) was used for pre-referral treatment of uncomplicated, moderate and severe falciparum malaria in 264 under five years children attendi...

Background: The biting preference of Simulium vectors has been known to influence the distribution of Onchocerca nodules and microfilariae in human body. There is, however, variation in biting pattern of Simulium flies in different geographical locations. This study investigates the biting pattern on human parts by Simulium vectors along Osun rive...

There is an urgent need for information on schistosomiasis in preschool children, who are often excluded in mass treatment programmes. The prevalence and intensity of Schistosoma haematobium infection were determined in preschool children aged ≤ 6 years in two rural communities in Ijebu East, south-western Nigeria. Two urine samples each were colle...

2012. Implication of cockroaches as vectors of gastrointestinal parasites in parts of Osogbo, Southwestern Nigeria. Munis Entomology & Zoology, 7 (2): 1106-1110] ABSTRACT: Cockroaches are one of the ubiquitous insects around human residential areas and their filthy habits make them to be potential carriers of pathogens. In this study, we document t...