Journal Article > ResearchFull Text
Trop Med Infect Dis. 6 December 2024; Volume 9 (Issue 12); 300.; DOI: 10.3390/tropicalmed9120300
Chippaux JP, Madec Y, Amta P, Ntone R, Noël G, et al.
Trop Med Infect Dis. 6 December 2024; Volume 9 (Issue 12); 300.; DOI: 10.3390/tropicalmed9120300
Snakes responsible for bites are rarely identified, resulting in a loss of information about snakebites from venomous species whose venom effects are poorly understood. A prospective clinical study including patients bitten by a snake was conducted in Cameroon between 2019 and 2021 to evaluate the efficacy and tolerability of a marketed polyvalent antivenom. Clinical presentation during the first 3 days of hospitalization was recorded following a standardized protocol. This ancillary study aimed to assess the frequency of bites by the different species encountered in Cameroon and to describe the symptoms of bites by formally identified species. Of the 447 patients included in the study, 159 (35.6%) brought the snake that caused the bite that was identified by a specialist. Out of these, 8 specimens could not be identified due to poor condition, 19 were non-venomous species, and 95 belonged to Echis romani—formerly E. ocellatus—species. The remaining 37 specimens included 2 Atheris squamigera, 12 Atractaspis spp., 2 Bitis arietans, 11 Causus maculatus, 1 Dendroaspis jamesoni, 1 Naja haje, 1 N. katiensis, 5 N. melanoleuca complex, and 2 N. nigricollis. Symptoms, severity of envenomation, and post-treatment course are described. Symptoms and severity of bites are consistent with cases described in the literature, but some specific features are highlighted.
Journal Article > ResearchFull Text
Toxins. 22 March 2024; Volume 16 (Issue 4); 165.; DOI:10.3390/toxins16040165
Benhammou D, Chippaux JP, Ntone R, Madec Y, Amta P, et al.
Toxins. 22 March 2024; Volume 16 (Issue 4); 165.; DOI:10.3390/toxins16040165
Snakebite envenomation (SBE) is a public health issue in sub-Saharan countries. Antivenom is the only etiological treatment. Excellent tolerance is essential in managing SBE successfully. This study aimed to evaluate tolerance of InoserpTM PAN-AFRICA (IPA). It was conducted on fourteen sites across Cameroon. IPA was administered intravenously and repeated at the same dose every two hours if needed. Early and late tolerance was assessed by the onset of clinical signs within two hours and at a visit two weeks or more after the first IPA administration, respectively. Over 20 months, 447 patients presenting with a snakebite were included. One dose of IPA was administered to 361 patients and repeated at least once in 106 patients. No significant difference was shown between the proportion of adverse events in patients who received IPA (266/361, 73.7%) and those who did not (69/85, 81.2%) (p = 0.95). Adverse reactions, probably attributable to IPA, were identified in four (1.1%) patients, including one severe (angioedema) and three mild. All these reactions resolved favorably. None of the serious adverse events observed in twelve patients were attributed to IPA. No signs of late intolerance were observed in 302 patients. Tolerance appears to be satisfactory. The availability of effective and well-tolerated antivenoms would reduce the duration of treatment and prevent most disabilities and/or deaths.
Journal Article > ResearchFull Text
PLoS Negl Trop Dis. 8 November 2023; Volume 17 (Issue 11); e0011707.; DOI:10.1371/journal.pntd.0011707
Chippaux JP, Ntone R, Benhammou D, Madec Y, Noël G, et al.
PLoS Negl Trop Dis. 8 November 2023; Volume 17 (Issue 11); e0011707.; DOI:10.1371/journal.pntd.0011707
BACKGROUND
Snakebites is a serious public health issue but remains a neglected tropical disease. Data on antivenom effectiveness are urgently needed in Africa. We assessed effectiveness of Inoserp PAN-AFRICA (IPA), the recommended antivenom available in Cameroon.
METHODOLOGY/PRINCIPAL FINDINGS
We enrolled 447 patients presenting with snakebite in 14 health facilities across Cameroon. At presentation, cytotoxicity, coagulation troubles and neurotoxicity were graded. We administered two to four vials of antivenom to patients based on hemotoxic or neurotoxic signs. We renewed antivenom administration to patients with persistence of bleedings or neurotoxicity 2 hours after each injection. We defined early improvement as a reduction of the grade of envenomation symptoms 2 hours after first injection. Medium-term effectiveness was investigated looking at disappearance of symptoms during hospitalization. After hospital discharge, a home visit was planned to assess long-term outcomes.
Between October 2019 and May 2021, we enrolled 447 (93.7%), including 72% from the savannah regions. The median [IQR] age was 25 [14–40]. Envenomation was diagnosed in 369 (82.6%) participants. The antivenom was administered to 356 patients (96.5%) of whom 256 (71.9%) received one administration. Among these patients, cytotoxic symptoms were observed in 336 (94.4%) participants, coagulation disorders in 234 (65.7%) participants and neurotoxicity in 23 (6.5%) participants. Two hours after the first administration of antivenom, we observed a decrease in coagulation disorders or neurotoxicity in 75.2% and 39.1% of patients, respectively. Complete cessation of bleedings and neurotoxicity occurred in 96% and 93% of patients within 24 hours, respectively. Sequelae have been observed in 9 (3%) patients at the home visit 15 days after hospital admission and 11 (3%) died including one before antivenom injection.
CONCLUSIONS/SIGNIFICANCE
We confirmed good effectiveness of the IPA and highlighted the rapid improvement in bleeding or neurotoxicity after the first administration. Sequential administrations of low doses of antivenom, rigorously assessed at short intervals for an eventual renewal, can preserve patient safety and save antivenom.
Snakebites is a serious public health issue but remains a neglected tropical disease. Data on antivenom effectiveness are urgently needed in Africa. We assessed effectiveness of Inoserp PAN-AFRICA (IPA), the recommended antivenom available in Cameroon.
METHODOLOGY/PRINCIPAL FINDINGS
We enrolled 447 patients presenting with snakebite in 14 health facilities across Cameroon. At presentation, cytotoxicity, coagulation troubles and neurotoxicity were graded. We administered two to four vials of antivenom to patients based on hemotoxic or neurotoxic signs. We renewed antivenom administration to patients with persistence of bleedings or neurotoxicity 2 hours after each injection. We defined early improvement as a reduction of the grade of envenomation symptoms 2 hours after first injection. Medium-term effectiveness was investigated looking at disappearance of symptoms during hospitalization. After hospital discharge, a home visit was planned to assess long-term outcomes.
Between October 2019 and May 2021, we enrolled 447 (93.7%), including 72% from the savannah regions. The median [IQR] age was 25 [14–40]. Envenomation was diagnosed in 369 (82.6%) participants. The antivenom was administered to 356 patients (96.5%) of whom 256 (71.9%) received one administration. Among these patients, cytotoxic symptoms were observed in 336 (94.4%) participants, coagulation disorders in 234 (65.7%) participants and neurotoxicity in 23 (6.5%) participants. Two hours after the first administration of antivenom, we observed a decrease in coagulation disorders or neurotoxicity in 75.2% and 39.1% of patients, respectively. Complete cessation of bleedings and neurotoxicity occurred in 96% and 93% of patients within 24 hours, respectively. Sequelae have been observed in 9 (3%) patients at the home visit 15 days after hospital admission and 11 (3%) died including one before antivenom injection.
CONCLUSIONS/SIGNIFICANCE
We confirmed good effectiveness of the IPA and highlighted the rapid improvement in bleeding or neurotoxicity after the first administration. Sequential administrations of low doses of antivenom, rigorously assessed at short intervals for an eventual renewal, can preserve patient safety and save antivenom.
Journal Article > ResearchFull Text
Lancet Global Health. 1 February 2023; Volume 11 (Issue 2); e296-e300.; DOI:10.1016/S2214-109X(22)00479-X
Abouyannis M, Esmail H, Hamaluba M, Ngama M, Mwangudzah H, et al.
Lancet Global Health. 1 February 2023; Volume 11 (Issue 2); e296-e300.; DOI:10.1016/S2214-109X(22)00479-X
Snakebite clinical trials have often used heterogeneous outcome measures and there is an urgent need for standardisation. A globally representative group of key stakeholders came together to reach consensus on a globally relevant set of core outcome measurements. Outcome domains and outcome measurement instruments were identified through searching the literature and a systematic review of snakebite clinical trials. Outcome domains were shortlisted by use of a questionnaire and consensus was reached among stakeholders and the patient group through facilitated discussions and voting. Five universal core outcome measures should be included in all future snakebite clinical trials-mortality, WHO disability assessment scale, patient-specific functional scale, acute allergic reaction by Brown criteria, and serum sickness by formal criteria. Additional syndrome-specific core outcome measures should be used depending on the biting species. This core outcome measurement set provides global standardisation, supports the priorities of patients and clinicians, enables meta-analysis, and is appropriate for use in low-income and middle-income settings.
Journal Article > ResearchFull Text
Med Trop Sante Int
MTSI
MTSI bulletin
MTSI magazine
MTSI-Revue
Médecine tropicale et santé internationale. Bulletin
Médecine tropicale et santé internationale. Magazine
MTSI, la revue de la Société francophone de médecine tropicale et santé internationale. 1 February 2023; Volume 3 (Issue 3); DOI:10.48327/mtsi.v3i3.2023.421
Abouyannis M, Esmail H, Hamaluba M, Ngama M, Mwangudzah H, et al.
Med Trop Sante Int
MTSI
MTSI bulletin
MTSI magazine
MTSI-Revue
Médecine tropicale et santé internationale. Bulletin
Médecine tropicale et santé internationale. Magazine
MTSI, la revue de la Société francophone de médecine tropicale et santé internationale. 1 February 2023; Volume 3 (Issue 3); DOI:10.48327/mtsi.v3i3.2023.421
English
Français
CONTEXTE
Les essais cliniques sur les morsures de serpent ont souvent utilisé des critères de décision hétérogènes qui demandent à être standardisés.
MÉTHODE
Un groupe d'acteurs clés mondialement représentatifs s'est réuni pour parvenir à un consensus sur un jeu universel de critères de décision de base. Les domaines d'intérêt et les instruments d'évaluation des critères de décision ont été identifiés à partir d'une recherche documentaire et d'un examen systématique des essais cliniques concernant les envenimations par morsure de serpent. Les domaines d'intérêt ont été présélectionnés à l'aide d'un questionnaire et un consensus a été obtenu entre le groupe d'acteurs et un groupe représentatif de patients à la suite de discussions orientées et d'un vote.
RÉSULTATS
Cinq critères de décision de base universels devraient être inclus dans tous les futurs essais cliniques sur les morsures de serpent : la mortalité, l'échelle d'évaluation du handicap de l'OMS, l'échelle fonctionnelle propre à chaque patient, la réaction allergique immédiate selon les critères de Brown et la maladie sérique en fonction de critères formels. D'autres critères de décision spécifiques aux différents syndromes observés lors des envenimations par morsure de serpent doivent être utilisés en fonction de l'espèce responsable de la morsure.
CONCLUSION
Ce jeu universel de critères de décision de base permet une standardisation mondiale, répond aux priorités des patients et des cliniciens, favorise des méta-analyses et est compatible avec une utilisation dans les pays à revenu faible ou intermédiaire.
Les essais cliniques sur les morsures de serpent ont souvent utilisé des critères de décision hétérogènes qui demandent à être standardisés.
MÉTHODE
Un groupe d'acteurs clés mondialement représentatifs s'est réuni pour parvenir à un consensus sur un jeu universel de critères de décision de base. Les domaines d'intérêt et les instruments d'évaluation des critères de décision ont été identifiés à partir d'une recherche documentaire et d'un examen systématique des essais cliniques concernant les envenimations par morsure de serpent. Les domaines d'intérêt ont été présélectionnés à l'aide d'un questionnaire et un consensus a été obtenu entre le groupe d'acteurs et un groupe représentatif de patients à la suite de discussions orientées et d'un vote.
RÉSULTATS
Cinq critères de décision de base universels devraient être inclus dans tous les futurs essais cliniques sur les morsures de serpent : la mortalité, l'échelle d'évaluation du handicap de l'OMS, l'échelle fonctionnelle propre à chaque patient, la réaction allergique immédiate selon les critères de Brown et la maladie sérique en fonction de critères formels. D'autres critères de décision spécifiques aux différents syndromes observés lors des envenimations par morsure de serpent doivent être utilisés en fonction de l'espèce responsable de la morsure.
CONCLUSION
Ce jeu universel de critères de décision de base permet une standardisation mondiale, répond aux priorités des patients et des cliniciens, favorise des méta-analyses et est compatible avec une utilisation dans les pays à revenu faible ou intermédiaire.
Journal Article > ResearchFull Text
PLoS Negl Trop Dis. 25 October 2018; Volume 12 (Issue 10); DOI:10.1371/journal.pntd.0006716
Taieb F, Dub T, Madec Y, Tondeur L, Chippaux JP, et al.
PLoS Negl Trop Dis. 25 October 2018; Volume 12 (Issue 10); DOI:10.1371/journal.pntd.0006716
Snakebite has only recently been recognized as a neglected tropical disease by the WHO. Knowledge regarding snakebites and its care is poor both at the population level, and at the health care staff level. The goal of this study was to describe the level of knowledge and clinical practice regarding snakebite among health care staff from Cameroon.
Journal Article > Case Report/SeriesFull Text
J Venom Anim Toxins Incl Trop Dis. 30 December 2012; Volume 18 (Issue 4); DOI:10.1590/S1678-91992012000400019
Gras S, Plantefeve G, Baud FJ, Chippaux JP
J Venom Anim Toxins Incl Trop Dis. 30 December 2012; Volume 18 (Issue 4); DOI:10.1590/S1678-91992012000400019
Snakebite is a particularly important health problem in rural areas of tropical regions. A large number of victims survive with permanent physical sequelae due to local tissue necrosis. However, necrosis may be associated with compartment syndrome especially when the bite is on the hands or feet. Herein, we describe two cases reported at a rural district hospital in Central African Republic. The present study suggests that active multidisciplinary management may improve patient prognosis while evidencing how difficult it is to decide on surgical intervention.