High rabies burden and low vaccination status among dogs inflicting bite in Addis Ababa: an urgent call for action.

INTRODUCTION: Rabies remains a global threat, killing approximately 60,000 people every year. In Ethiopia, dogs are the main reservoir of the disease. Animals also estimate the burden of the disease. METHODOLOGY: Data from 2016 to 2020 were extracted from a rabies cases recording book of the Ethiopian Public Health Institute. Proportions and trends over time were analyzed. Brain samples of dogs were diagnosed with a Fluorescent Anti Body test. RESULTS: A total of 6,001 dogs inflicting bites were brought to the laboratory. A high proportion of dogs 4,389 73.14% were not vaccinated. The total number of dogs brought to the laboratory was decreasing over the last five years. Among 1,216 dog brain samples examined 855 (70.3%) confirmed rabies. The proportion of rabies cases was increasing from 8.5% in 2016 and 32.6% in 2020. The highest rabies proportion (33.8%) was reported in 2018. Out of the total (2,156) dogs inflicting bites and observed for 10 days, only 468 (21.7%) of the observation report was tracked and reported. CONCLUSIONS: There is a high proportion of rabies in dogs inflicting bites in Addis Ababa. The findings are alarming with seven out of ten dogs diagnosed being infected with rabies. Only two dogs were vaccinated out of ten dogs inflicting bites. Rabies became a serious public health problem in the city that needs urgent health action from all sectors including the city administration.

The effect of quinine on the electroretinograms of children with pediatric cerebral malaria.

To investigate the effects of quinine on the electroretinograms (ERGs) of children with cerebral malaria (CM), we recruited subjects during a single malaria season in Blantyre, Malawi. Seventy ERG investigations were performed, on 34 children with CM. Time recorded from completion of the most recent quinine infusion was termed "quinine elapsed time" (QET). In a subgroup of 16 children, whole-blood quinine concentrations were estimated in a sample of capillary blood, for validation. A significant positive association was found between QET and both maximal-response A-wave amplitude (MRAWA; P=.03) and cone A-wave amplitude (P=.04). Longitudinal analysis demonstrated a significant trend of increasing MRAWA with increasing QET (P=.03). Parenteral quinine administered in therapeutic doses to a pediatric population appears to cause a transient depression in photoreceptor function. No evidence of ocular quinine toxicity was found at the therapeutic doses used.

Plasmodium falciparum: in vitro activity of sulfadoxine and dapsone in field isolates from Kenya: point mutations in dihydropteroate synthase may not be the only determinants in sulfa resistance.

We have determined the relationship between point mutations in the gene that encodes the sulfa target, dihydropteroate synthase (DHPS) and the chemosensitivity profile to sulfadoxine and dapsone in 67 isolates from Kilifi, Kenya. We assessed the presence of mutations at codons 436, 437, 540, 581, and 613 of dhps. The results showed that the dhps genotype had a strong influence on the sensitivity to sulfadoxine and dapsone, but that the correlation was far from perfect. Eleven isolates carried a wild-type dhps allele, but were resistant to sulfadoxine (IC(50) values >10 microg/ml), and 4/28 isolates were classed as sensitive to sulfadoxine (IC(50) values <10 microg/ml), but carried a triple mutant (436/437/613) allele of dhps. These data show that in low folate medium in vitro, the dhps genotype alone did not account completely for sulfadoxine or dapsone resistance; other factors such as the utilisation of exogenous folate must also be considered.