Background: Severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) infection is a global pandemic. Healthcare workers' (HCWs) role in patient management is predisposing and can serve as means of hospitals and community transmission. This study evaluated HCWs' knowledge, attitude, and practice towards COVID-19 in Nigeria. Methods: we carried out a cross-sectional survey among HCWs during the COVID-19 outbreak in Nigeria from March to June 2020. The study assessed 346 HCWs for Knowledge, attitude, and practice by using an online (Google form) self-administered questionnaire, based on a convinience sampling technique Data were retrieved and analyzed using descriptive statistics. Chi-Square and one-way ANOVA were used to measure association and difference among demographic variables. The relationship between knowledge, attitude, and practice was measured using Spearman's rho correlation test. Results: the mean knowledge score of the HCWs was 7.1 on a scale of 0-8. The correct overall rate of the knowledge questionnaire was 88.75%. Knowledge was gained mainly from television (35.0%) and social media (35.0%). The mean attitude score on a scale of 0-6 was 5.31 AE 0.39. Most (92.5%) participants were confident that Nigerian medical scientists would win the war against COVID-19. The majority (92.2%) of the respondents thought that SARS-CoV-2 was not a biological weapon. About 1 out of 5 respondents held that faith healing or prayer is the only cure for COVID-19. A vast majority of the HCWs were taking precautionary measures such as avoiding crowded places (94.2%), washing of hands (96.0%), and the use of personal protective equipment (91.6%) against SARS-CoV-2 infection. Nevertheless, only 3 out of 5 HCWs used a face mask when leaving home. There was a significant (p ¼ 0.046) positive correlation (0.584) between knowledge and attitude. Conclusion: our results showed that HCWs in Nigeria had excellent knowledge and possessed a positive attitude and good practice towards COVID-19. However; there were areas where poor knowledge, negative attitudes and unacceptable practices were observed. We recommend continuous public health education of HCWs on SARS-COV-2 infection control and prevention.

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The Mycobacterium tuberculosis complex (MTBC) comprises the species that causes tuberculosis (TB) which affects 10 million people every year. A robust classification of species, lineages, and sub-lineages is important to explore associations with drug resistance, epidemiological patterns or clinical outcomes. We present a rapid and easy-to-follow methodology to classify clinical TB samples into the main MTBC clades. Approaches are based on the identification of lineage and sub-lineage diagnostic SNP using a real-time PCR high resolution melting assay and classic Sanger sequencing from low-concentrated, low quality DNA. Thus, suitable for implementation in middle and low-income countries. Once we validated our molecular procedures, we characterized a total of 491 biological samples from human and cattle hosts, representing countries with different TB burden. Overall, we managed to genotype ~95% of all samples despite coming from unpurified and low-concentrated DNA. Our approach also allowed us to detect zoonotic cases in eight human samples from Nigeria. To conclude, the molecular techniques we have developed, are accurate, discriminative and reproducible. Furthermore, it costs less than other classic typing methods, resulting in an affordable alternative method in TB laboratories.

Coxiellosis (Q-fever) caused by Coxiella burnetii is a cosmopolitan zoonosis that causes significant losses through abortions and stillbirths in small ruminants. A cross-sectional seroprevalence study was conducted in three agricultural zones of Borno State in the flocks of sheep and goats. Seven hundred sixty-eight small ruminants (384 sheep and goats each) of both sexes (282 males and 486 females) of different age groups from 90 flocks were randomly selected to collect sera and related epidemiological data information. A commercial indirect enzyme-linked immunosorbent assay (iELISA; I.D. Vet) was used to test the samples for the presence of both phases I and II antibodies to Coxiella burnetii infections. The seroprevalence in sheep and goats was 10.9% (44/384) and 12.0% (46/384). There was no statistically significant association in the two species of the animals tested and the infection rates of coxiellosis. Bivariate analysis showed that female animals of all species tested were more seropositive for antibodies to Coxiella burnetii than males. There was a statistically significant association between the sex of both sheep and goats tested and the infection rates of coxiellosis. Breed and age of sheep and goats were not statistically significant for seropositivity to Coxiella burnetii. The study indicates that seroprevalence of coxiellosis was high in the studied small ruminants’ population, particularly among female sheep and goats and can be considered a potential risk for both susceptible animals and humans in the study area.